make DuplicationMeasuresStep support Views Component tree

5 files changed, 787 insertions, 399 deletions

diff --git a/server/sonar-server/src/main/java/org/sonar/server/computation/step/DuplicationMeasuresStep.java b/server/sonar-server/src/main/java/org/sonar/server/computation/step/DuplicationMeasuresStep.java
index aa058b199c4..f95579432cb 100644
--- a/server/sonar-server/src/main/java/org/sonar/server/computation/step/DuplicationMeasuresStep.java
+++ b/server/sonar-server/src/main/java/org/sonar/server/computation/step/DuplicationMeasuresStep.java
@@ -23,14 +23,14 @@ package org.sonar.server.computation.step;
 import com.google.common.base.Optional;
 import com.google.common.collect.ImmutableList;
 import org.sonar.api.measures.CoreMetrics;
-import org.sonar.server.computation.component.Component;
+import org.sonar.server.computation.component.CrawlerDepthLimit;
 import org.sonar.server.computation.component.PathAwareCrawler;
 import org.sonar.server.computation.component.TreeRootHolder;
 import org.sonar.server.computation.formula.Counter;
 import org.sonar.server.computation.formula.CreateMeasureContext;
-import org.sonar.server.computation.formula.LeafAggregateContext;
 import org.sonar.server.computation.formula.Formula;
 import org.sonar.server.computation.formula.FormulaExecutorComponentVisitor;
+import org.sonar.server.computation.formula.LeafAggregateContext;
 import org.sonar.server.computation.formula.SumCounter;
 import org.sonar.server.computation.measure.Measure;
 import org.sonar.server.computation.measure.MeasureRepository;
@@ -45,7 +45,6 @@ import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_DENSITY_KEY;
 import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_KEY;
 import static org.sonar.api.measures.CoreMetrics.LINES_KEY;
 import static org.sonar.api.measures.CoreMetrics.NCLOC_KEY;
-import static org.sonar.server.computation.component.Component.Type.FILE;
 
 /**
  * Computes duplication measures on files and then aggregates them on higher components.
@@ -102,7 +101,8 @@ public class DuplicationMeasuresStep implements ComputationStep {
 
     private Optional<Measure> createDuplicatedLinesMeasure(SumDuplicationCounter counter, CreateMeasureContext context) {
       int duplicatedLines = counter.value;
-      if (context.getMetric().getKey().equals(DUPLICATED_LINES_KEY) && context.getComponent().getType().isHigherThan(FILE)) {
+      if (context.getMetric().getKey().equals(DUPLICATED_LINES_KEY)
+        && CrawlerDepthLimit.LEAVES.isDeeperThan(context.getComponent().getType())) {
         return Optional.of(Measure.newMeasureBuilder().create(duplicatedLines));
       }
       return Optional.absent();
@@ -156,7 +156,7 @@ public class DuplicationMeasuresStep implements ComputationStep {
     @Override
     public Optional<Measure> createMeasure(SumDuplicationCounter counter, CreateMeasureContext context) {
       int value = counter.value;
-      if (context.getComponent().getType().isHigherThan(Component.Type.FILE)) {
+      if (CrawlerDepthLimit.LEAVES.isDeeperThan(context.getComponent().getType())) {
         return Optional.of(Measure.newMeasureBuilder().create(value));
       }
       return Optional.absent();
diff --git a/server/sonar-server/src/test/java/org/sonar/server/computation/component/ViewsComponent.java b/server/sonar-server/src/test/java/org/sonar/server/computation/component/ViewsComponent.java
index c8a54109faa..326b13ff279 100644
--- a/server/sonar-server/src/test/java/org/sonar/server/computation/component/ViewsComponent.java
+++ b/server/sonar-server/src/test/java/org/sonar/server/computation/component/ViewsComponent.java
@@ -48,7 +48,7 @@ public class ViewsComponent implements Component {
   private ViewsComponent(Type type, String key, @Nullable String uuid, @Nullable String name,
     List<Component> children,
     @Nullable ProjectViewAttributes projectViewAttributes) {
-    checkArgument(type.isViewsType());
+    checkArgument(type.isViewsType(), "Component type must be a Views type");
     this.type = type;
     this.key = requireNonNull(key);
     this.uuid = uuid;
diff --git a/server/sonar-server/src/test/java/org/sonar/server/computation/step/DuplicationMeasuresStepTest.java b/server/sonar-server/src/test/java/org/sonar/server/computation/step/DuplicationMeasuresStepTest.java
deleted file mode 100644
index 17f08370daf..00000000000
--- a/server/sonar-server/src/test/java/org/sonar/server/computation/step/DuplicationMeasuresStepTest.java
+++ /dev/null
@@ -1,393 +0,0 @@
-/*
- * SonarQube, open source software quality management tool.
- * Copyright (C) 2008-2014 SonarSource
- * mailto:contact AT sonarsource DOT com
- *
- * SonarQube is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
- *
- * SonarQube is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
- */
-
-package org.sonar.server.computation.step;
-
-import org.junit.Before;
-import org.junit.Rule;
-import org.junit.Test;
-import org.sonar.server.computation.batch.TreeRootHolderRule;
-import org.sonar.server.computation.measure.MeasureRepositoryRule;
-import org.sonar.server.computation.metric.MetricRepositoryRule;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.guava.api.Assertions.assertThat;
-import static org.sonar.api.measures.CoreMetrics.COMMENT_LINES;
-import static org.sonar.api.measures.CoreMetrics.COMMENT_LINES_KEY;
-import static org.sonar.api.measures.CoreMetrics.DUPLICATED_BLOCKS;
-import static org.sonar.api.measures.CoreMetrics.DUPLICATED_BLOCKS_KEY;
-import static org.sonar.api.measures.CoreMetrics.DUPLICATED_FILES;
-import static org.sonar.api.measures.CoreMetrics.DUPLICATED_FILES_KEY;
-import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES;
-import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_DENSITY;
-import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_DENSITY_KEY;
-import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_KEY;
-import static org.sonar.api.measures.CoreMetrics.LINES;
-import static org.sonar.api.measures.CoreMetrics.LINES_KEY;
-import static org.sonar.api.measures.CoreMetrics.NCLOC;
-import static org.sonar.api.measures.CoreMetrics.NCLOC_KEY;
-import static org.sonar.server.computation.component.Component.Type.DIRECTORY;
-import static org.sonar.server.computation.component.Component.Type.FILE;
-import static org.sonar.server.computation.component.Component.Type.MODULE;
-import static org.sonar.server.computation.component.Component.Type.PROJECT;
-import static org.sonar.server.computation.component.ReportComponent.builder;
-import static org.sonar.server.computation.measure.Measure.newMeasureBuilder;
-
-public class DuplicationMeasuresStepTest {
-
-  private static final int ROOT_REF = 1;
-  private static final int MODULE_REF = 12;
-  private static final int SUB_MODULE_REF = 123;
-  private static final int DIRECTORY_REF = 1234;
-  private static final int FILE_1_REF = 12341;
-  private static final int FILE_2_REF = 12342;
-
-  @Rule
-  public TreeRootHolderRule treeRootHolder = new TreeRootHolderRule();
-
-  @Rule
-  public MetricRepositoryRule metricRepository = new MetricRepositoryRule()
-    .add(LINES)
-    .add(NCLOC)
-    .add(COMMENT_LINES)
-    .add(DUPLICATED_BLOCKS)
-    .add(DUPLICATED_FILES)
-    .add(DUPLICATED_LINES)
-    .add(DUPLICATED_LINES_DENSITY);
-
-  @Rule
-  public MeasureRepositoryRule measureRepository = MeasureRepositoryRule.create(treeRootHolder, metricRepository);
-
-  ComputationStep underTest = new DuplicationMeasuresStep(treeRootHolder, metricRepository, measureRepository);
-
-  @Before
-  public void setUp() throws Exception {
-    treeRootHolder.setRoot(
-      builder(PROJECT, ROOT_REF)
-        .addChildren(
-          builder(MODULE, MODULE_REF)
-            .addChildren(
-              builder(MODULE, SUB_MODULE_REF)
-                .addChildren(
-                  builder(DIRECTORY, DIRECTORY_REF)
-                    .addChildren(
-                      builder(FILE, FILE_1_REF).build(),
-                      builder(FILE, FILE_2_REF).build()
-                    ).build()
-                ).build()
-            ).build()
-        ).build());
-  }
-
-  @Test
-  public void aggregate_duplicated_blocks() {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY, newMeasureBuilder().create(10));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY, newMeasureBuilder().create(40));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(50);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(50);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(50);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(50);
-  }
-
-  @Test
-  public void aggregate_zero_duplicated_blocks() {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY, newMeasureBuilder().create(0));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(0);
-  }
-
-  @Test
-  public void aggregate_zero_duplicated_blocks_when_no_data() {
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_BLOCKS_KEY).get().getIntValue()).isEqualTo(0);
-  }
-
-  @Test
-  public void aggregate_duplicated_files() {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY, newMeasureBuilder().create(10));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY, newMeasureBuilder().create(40));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(50);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(50);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(50);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(50);
-  }
-
-  @Test
-  public void aggregate_zero_duplicated_files() {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY, newMeasureBuilder().create(0));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(0);
-  }
-
-  @Test
-  public void aggregate_zero_duplicated_files_when_no_data() {
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_FILES_KEY).get().getIntValue()).isEqualTo(0);
-  }
-
-  @Test
-  public void aggregate_duplicated_lines() {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(10));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(40));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(50);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(50);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(50);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(50);
-  }
-
-  @Test
-  public void aggregate_zero_duplicated_line() {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(0));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(0);
-  }
-
-  @Test
-  public void aggregate_zero_duplicated_line_when_no_data() {
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY)).isAbsent();
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(0);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_LINES_KEY).get().getIntValue()).isEqualTo(0);
-  }
-
-  @Test
-  public void compute_and_aggregate_duplicated_lines_density_using_lines() throws Exception {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(2));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(3));
-
-    measureRepository.addRawMeasure(FILE_1_REF, LINES_KEY, newMeasureBuilder().create(10));
-    measureRepository.addRawMeasure(FILE_2_REF, LINES_KEY, newMeasureBuilder().create(40));
-    measureRepository.addRawMeasure(DIRECTORY_REF, LINES_KEY, newMeasureBuilder().create(50));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, LINES_KEY, newMeasureBuilder().create(50));
-    measureRepository.addRawMeasure(MODULE_REF, LINES_KEY, newMeasureBuilder().create(50));
-    measureRepository.addRawMeasure(ROOT_REF, LINES_KEY, newMeasureBuilder().create(50));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(20d);
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(7.5d);
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-  }
-
-  @Test
-  public void compute_and_aggregate_duplicated_lines_density_using_nclocs_and_comment_lines() throws Exception {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(2));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(3));
-
-    measureRepository.addRawMeasure(FILE_1_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(2));
-    measureRepository.addRawMeasure(FILE_2_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(10));
-    measureRepository.addRawMeasure(DIRECTORY_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(12));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(12));
-    measureRepository.addRawMeasure(MODULE_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(12));
-    measureRepository.addRawMeasure(ROOT_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(12));
-
-    measureRepository.addRawMeasure(FILE_1_REF, NCLOC_KEY, newMeasureBuilder().create(8));
-    measureRepository.addRawMeasure(FILE_2_REF, NCLOC_KEY, newMeasureBuilder().create(30));
-    measureRepository.addRawMeasure(DIRECTORY_REF, NCLOC_KEY, newMeasureBuilder().create(38));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, NCLOC_KEY, newMeasureBuilder().create(38));
-    measureRepository.addRawMeasure(MODULE_REF, NCLOC_KEY, newMeasureBuilder().create(38));
-    measureRepository.addRawMeasure(ROOT_REF, NCLOC_KEY, newMeasureBuilder().create(38));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(20d);
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(7.5d);
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-  }
-
-  @Test
-  public void compute_duplicated_lines_density_using_only_nclocs() throws Exception {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(2));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(3));
-
-    measureRepository.addRawMeasure(FILE_1_REF, NCLOC_KEY, newMeasureBuilder().create(10));
-    measureRepository.addRawMeasure(FILE_2_REF, NCLOC_KEY, newMeasureBuilder().create(40));
-    measureRepository.addRawMeasure(DIRECTORY_REF, NCLOC_KEY, newMeasureBuilder().create(50));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, NCLOC_KEY, newMeasureBuilder().create(50));
-    measureRepository.addRawMeasure(MODULE_REF, NCLOC_KEY, newMeasureBuilder().create(50));
-    measureRepository.addRawMeasure(ROOT_REF, NCLOC_KEY, newMeasureBuilder().create(50));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(20d);
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(7.5d);
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(10d);
-  }
-
-  @Test
-  public void compute_zero_percent_duplicated_lines_density_when_duplicated_lines_are_zero() throws Exception {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(0));
-
-    measureRepository.addRawMeasure(FILE_1_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(2));
-    measureRepository.addRawMeasure(FILE_2_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(10));
-    measureRepository.addRawMeasure(DIRECTORY_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(12));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(12));
-    measureRepository.addRawMeasure(MODULE_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(12));
-    measureRepository.addRawMeasure(ROOT_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(12));
-
-    measureRepository.addRawMeasure(FILE_1_REF, NCLOC_KEY, newMeasureBuilder().create(8));
-    measureRepository.addRawMeasure(FILE_2_REF, NCLOC_KEY, newMeasureBuilder().create(30));
-    measureRepository.addRawMeasure(DIRECTORY_REF, NCLOC_KEY, newMeasureBuilder().create(38));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, NCLOC_KEY, newMeasureBuilder().create(38));
-    measureRepository.addRawMeasure(MODULE_REF, NCLOC_KEY, newMeasureBuilder().create(38));
-    measureRepository.addRawMeasure(ROOT_REF, NCLOC_KEY, newMeasureBuilder().create(38));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(0d);
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(0d);
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(0d);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(0d);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(0d);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(0d);
-  }
-
-  @Test
-  public void not_compute_duplicated_lines_density_when_lines_is_zero() throws Exception {
-    measureRepository.addRawMeasure(FILE_1_REF, LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(FILE_2_REF, LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(DIRECTORY_REF, LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(MODULE_REF, LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(ROOT_REF, LINES_KEY, newMeasureBuilder().create(0));
-
-    underTest.execute();
-
-    assertNoNewMeasures(DUPLICATED_LINES_DENSITY_KEY);
-  }
-
-  @Test
-  public void not_compute_duplicated_lines_density_when_ncloc_and_comment_are_zero() throws Exception {
-    measureRepository.addRawMeasure(FILE_1_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(FILE_2_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(DIRECTORY_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(MODULE_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(ROOT_REF, COMMENT_LINES_KEY, newMeasureBuilder().create(0));
-
-    measureRepository.addRawMeasure(FILE_1_REF, NCLOC_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(FILE_2_REF, NCLOC_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(DIRECTORY_REF, NCLOC_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, NCLOC_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(MODULE_REF, NCLOC_KEY, newMeasureBuilder().create(0));
-    measureRepository.addRawMeasure(ROOT_REF, NCLOC_KEY, newMeasureBuilder().create(0));
-
-    underTest.execute();
-
-    assertNoNewMeasures(DUPLICATED_LINES_DENSITY_KEY);
-  }
-
-  @Test
-  public void compute_100_percent_duplicated_lines_density() throws Exception {
-    measureRepository.addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(2));
-    measureRepository.addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, newMeasureBuilder().create(3));
-
-    measureRepository.addRawMeasure(FILE_1_REF, LINES_KEY, newMeasureBuilder().create(2));
-    measureRepository.addRawMeasure(FILE_2_REF, LINES_KEY, newMeasureBuilder().create(3));
-    measureRepository.addRawMeasure(DIRECTORY_REF, LINES_KEY, newMeasureBuilder().create(5));
-    measureRepository.addRawMeasure(SUB_MODULE_REF, LINES_KEY, newMeasureBuilder().create(5));
-    measureRepository.addRawMeasure(MODULE_REF, LINES_KEY, newMeasureBuilder().create(5));
-    measureRepository.addRawMeasure(ROOT_REF, LINES_KEY, newMeasureBuilder().create(5));
-
-    underTest.execute();
-
-    assertThat(measureRepository.getAddedRawMeasure(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(100d);
-    assertThat(measureRepository.getAddedRawMeasure(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(100d);
-    assertThat(measureRepository.getAddedRawMeasure(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(100d);
-    assertThat(measureRepository.getAddedRawMeasure(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(100d);
-    assertThat(measureRepository.getAddedRawMeasure(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(100d);
-    assertThat(measureRepository.getAddedRawMeasure(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY).get().getDoubleValue()).isEqualTo(100d);
-  }
-
-  private void assertNoNewMeasures(String metricKey){
-    assertThat(measureRepository.getAddedRawMeasures(FILE_1_REF).get(metricKey)).isEmpty();
-    assertThat(measureRepository.getAddedRawMeasures(FILE_2_REF).get(metricKey)).isEmpty();
-    assertThat(measureRepository.getAddedRawMeasures(DIRECTORY_REF).get(metricKey)).isEmpty();
-    assertThat(measureRepository.getAddedRawMeasures(SUB_MODULE_REF).get(metricKey)).isEmpty();
-    assertThat(measureRepository.getAddedRawMeasures(MODULE_REF).get(metricKey)).isEmpty();
-    assertThat(measureRepository.getAddedRawMeasures(ROOT_REF).get(metricKey)).isEmpty();
-  }
-
-}
diff --git a/server/sonar-server/src/test/java/org/sonar/server/computation/step/ReportDuplicationMeasuresStepTest.java b/server/sonar-server/src/test/java/org/sonar/server/computation/step/ReportDuplicationMeasuresStepTest.java
new file mode 100644
index 00000000000..650255cea78
--- /dev/null
+++ b/server/sonar-server/src/test/java/org/sonar/server/computation/step/ReportDuplicationMeasuresStepTest.java
@@ -0,0 +1,402 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2014 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+package org.sonar.server.computation.step;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.sonar.server.computation.batch.TreeRootHolderRule;
+import org.sonar.server.computation.measure.MeasureRepositoryRule;
+import org.sonar.server.computation.metric.MetricRepositoryRule;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.guava.api.Assertions.assertThat;
+import static org.sonar.api.measures.CoreMetrics.COMMENT_LINES;
+import static org.sonar.api.measures.CoreMetrics.COMMENT_LINES_KEY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_BLOCKS;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_BLOCKS_KEY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_FILES;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_FILES_KEY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_DENSITY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_DENSITY_KEY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_KEY;
+import static org.sonar.api.measures.CoreMetrics.LINES;
+import static org.sonar.api.measures.CoreMetrics.LINES_KEY;
+import static org.sonar.api.measures.CoreMetrics.NCLOC;
+import static org.sonar.api.measures.CoreMetrics.NCLOC_KEY;
+import static org.sonar.server.computation.component.Component.Type.DIRECTORY;
+import static org.sonar.server.computation.component.Component.Type.FILE;
+import static org.sonar.server.computation.component.Component.Type.MODULE;
+import static org.sonar.server.computation.component.Component.Type.PROJECT;
+import static org.sonar.server.computation.component.ReportComponent.builder;
+import static org.sonar.server.computation.measure.Measure.newMeasureBuilder;
+
+public class ReportDuplicationMeasuresStepTest {
+
+  private static final int ROOT_REF = 1;
+  private static final int MODULE_REF = 12;
+  private static final int SUB_MODULE_REF = 123;
+  private static final int DIRECTORY_REF = 1234;
+  private static final int FILE_1_REF = 12341;
+  private static final int FILE_2_REF = 12342;
+
+  @Rule
+  public TreeRootHolderRule treeRootHolder = new TreeRootHolderRule()
+    .setRoot(
+        builder(PROJECT, ROOT_REF)
+            .addChildren(
+                builder(MODULE, MODULE_REF)
+                    .addChildren(
+                        builder(MODULE, SUB_MODULE_REF)
+                            .addChildren(
+                                builder(DIRECTORY, DIRECTORY_REF)
+                                    .addChildren(
+                                        builder(FILE, FILE_1_REF).build(),
+                                        builder(FILE, FILE_2_REF).build())
+                                    .build())
+                            .build())
+                    .build())
+            .build());
+  @Rule
+  public MetricRepositoryRule metricRepository = new MetricRepositoryRule()
+    .add(LINES)
+    .add(NCLOC)
+    .add(COMMENT_LINES)
+    .add(DUPLICATED_BLOCKS)
+    .add(DUPLICATED_FILES)
+    .add(DUPLICATED_LINES)
+    .add(DUPLICATED_LINES_DENSITY);
+  @Rule
+  public MeasureRepositoryRule measureRepository = MeasureRepositoryRule.create(treeRootHolder, metricRepository);
+
+  ComputationStep underTest = new DuplicationMeasuresStep(treeRootHolder, metricRepository, measureRepository);
+
+  @Test
+  public void aggregate_duplicated_blocks() {
+    addRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY, 10);
+    addRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY, 40);
+
+    underTest.execute();
+
+    assertNoRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY);
+    assertNoRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_BLOCKS_KEY, 50);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_BLOCKS_KEY, 50);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_BLOCKS_KEY, 50);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_BLOCKS_KEY, 50);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_blocks() {
+    addRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY, 0);
+    addRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY, 0);
+
+    underTest.execute();
+
+    assertNoRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY);
+    assertNoRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_BLOCKS_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_blocks_when_no_data() {
+    underTest.execute();
+
+    assertNoRawMeasure(FILE_1_REF, DUPLICATED_BLOCKS_KEY);
+    assertNoRawMeasure(FILE_2_REF, DUPLICATED_BLOCKS_KEY);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_BLOCKS_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_duplicated_files() {
+    addRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY, 10);
+    addRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY, 40);
+
+    underTest.execute();
+
+    assertNoRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY);
+    assertNoRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_FILES_KEY, 50);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_FILES_KEY, 50);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_FILES_KEY, 50);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_FILES_KEY, 50);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_files() {
+    addRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY, 0);
+    addRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY, 0);
+
+    underTest.execute();
+
+    assertNoRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY);
+    assertNoRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_FILES_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_files_when_no_data() {
+    underTest.execute();
+
+    assertNoRawMeasure(FILE_1_REF, DUPLICATED_FILES_KEY);
+    assertNoRawMeasure(FILE_2_REF, DUPLICATED_FILES_KEY);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_FILES_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_duplicated_lines() {
+    addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, 10);
+    addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, 40);
+
+    underTest.execute();
+
+    assertNoRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY);
+    assertNoRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_LINES_KEY, 50);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_LINES_KEY, 50);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_LINES_KEY, 50);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_KEY, 50);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_line() {
+    addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, 0);
+    addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, 0);
+
+    underTest.execute();
+
+    assertNoRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY);
+    assertNoRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_line_when_no_data() {
+    underTest.execute();
+
+    assertNoRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY);
+    assertNoRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_KEY, 0);
+  }
+
+  @Test
+  public void compute_and_aggregate_duplicated_lines_density_using_lines() throws Exception {
+    addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, 2);
+    addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, 3);
+
+    addRawMeasure(FILE_1_REF, LINES_KEY, 10);
+    addRawMeasure(FILE_2_REF, LINES_KEY, 40);
+    addRawMeasure(DIRECTORY_REF, LINES_KEY, 50);
+    addRawMeasure(SUB_MODULE_REF, LINES_KEY, 50);
+    addRawMeasure(MODULE_REF, LINES_KEY, 50);
+    addRawMeasure(ROOT_REF, LINES_KEY, 50);
+
+    underTest.execute();
+
+    assertRawMeasureValue(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY, 20d);
+    assertRawMeasureValue(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY, 7.5d);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+  }
+
+  @Test
+  public void compute_and_aggregate_duplicated_lines_density_using_nclocs_and_comment_lines() throws Exception {
+    addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, 2);
+    addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, 3);
+
+    addRawMeasure(FILE_1_REF, COMMENT_LINES_KEY, 2);
+    addRawMeasure(FILE_2_REF, COMMENT_LINES_KEY, 10);
+    addRawMeasure(DIRECTORY_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(SUB_MODULE_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(MODULE_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(ROOT_REF, COMMENT_LINES_KEY, 12);
+
+    addRawMeasure(FILE_1_REF, NCLOC_KEY, 8);
+    addRawMeasure(FILE_2_REF, NCLOC_KEY, 30);
+    addRawMeasure(DIRECTORY_REF, NCLOC_KEY, 38);
+    addRawMeasure(SUB_MODULE_REF, NCLOC_KEY, 38);
+    addRawMeasure(MODULE_REF, NCLOC_KEY, 38);
+    addRawMeasure(ROOT_REF, NCLOC_KEY, 38);
+
+    underTest.execute();
+
+    assertRawMeasureValue(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY, 20d);
+    assertRawMeasureValue(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY, 7.5d);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+  }
+
+  @Test
+  public void compute_duplicated_lines_density_using_only_nclocs() throws Exception {
+    addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, 2);
+    addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, 3);
+
+    addRawMeasure(FILE_1_REF, NCLOC_KEY, 10);
+    addRawMeasure(FILE_2_REF, NCLOC_KEY, 40);
+    addRawMeasure(DIRECTORY_REF, NCLOC_KEY, 50);
+    addRawMeasure(SUB_MODULE_REF, NCLOC_KEY, 50);
+    addRawMeasure(MODULE_REF, NCLOC_KEY, 50);
+    addRawMeasure(ROOT_REF, NCLOC_KEY, 50);
+
+    underTest.execute();
+
+    assertRawMeasureValue(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY, 20d);
+    assertRawMeasureValue(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY, 7.5d);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+  }
+
+  @Test
+  public void compute_zero_percent_duplicated_lines_density_when_duplicated_lines_are_zero() throws Exception {
+    addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, 0);
+    addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, 0);
+
+    addRawMeasure(FILE_1_REF, COMMENT_LINES_KEY, 2);
+    addRawMeasure(FILE_2_REF, COMMENT_LINES_KEY, 10);
+    addRawMeasure(DIRECTORY_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(SUB_MODULE_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(MODULE_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(ROOT_REF, COMMENT_LINES_KEY, 12);
+
+    addRawMeasure(FILE_1_REF, NCLOC_KEY, 8);
+    addRawMeasure(FILE_2_REF, NCLOC_KEY, 30);
+    addRawMeasure(DIRECTORY_REF, NCLOC_KEY, 38);
+    addRawMeasure(SUB_MODULE_REF, NCLOC_KEY, 38);
+    addRawMeasure(MODULE_REF, NCLOC_KEY, 38);
+    addRawMeasure(ROOT_REF, NCLOC_KEY, 38);
+
+    underTest.execute();
+
+    assertRawMeasureValue(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY, 0d);
+    assertRawMeasureValue(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY, 0d);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY, 0d);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 0d);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 0d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 0d);
+  }
+
+  @Test
+  public void not_compute_duplicated_lines_density_when_lines_is_zero() throws Exception {
+    addRawMeasure(FILE_1_REF, LINES_KEY, 0);
+    addRawMeasure(FILE_2_REF, LINES_KEY, 0);
+    addRawMeasure(DIRECTORY_REF, LINES_KEY, 0);
+    addRawMeasure(SUB_MODULE_REF, LINES_KEY, 0);
+    addRawMeasure(MODULE_REF, LINES_KEY, 0);
+    addRawMeasure(ROOT_REF, LINES_KEY, 0);
+
+    underTest.execute();
+
+    assertNoRawMeasures(DUPLICATED_LINES_DENSITY_KEY);
+  }
+
+  @Test
+  public void not_compute_duplicated_lines_density_when_ncloc_and_comment_are_zero() throws Exception {
+    addRawMeasure(FILE_1_REF, COMMENT_LINES_KEY, 0);
+    addRawMeasure(FILE_2_REF, COMMENT_LINES_KEY, 0);
+    addRawMeasure(DIRECTORY_REF, COMMENT_LINES_KEY, 0);
+    addRawMeasure(SUB_MODULE_REF, COMMENT_LINES_KEY, 0);
+    addRawMeasure(MODULE_REF, COMMENT_LINES_KEY, 0);
+    addRawMeasure(ROOT_REF, COMMENT_LINES_KEY, 0);
+
+    addRawMeasure(FILE_1_REF, NCLOC_KEY, 0);
+    addRawMeasure(FILE_2_REF, NCLOC_KEY, 0);
+    addRawMeasure(DIRECTORY_REF, NCLOC_KEY, 0);
+    addRawMeasure(SUB_MODULE_REF, NCLOC_KEY, 0);
+    addRawMeasure(MODULE_REF, NCLOC_KEY, 0);
+    addRawMeasure(ROOT_REF, NCLOC_KEY, 0);
+
+    underTest.execute();
+
+    assertNoRawMeasures(DUPLICATED_LINES_DENSITY_KEY);
+  }
+
+  @Test
+  public void compute_100_percent_duplicated_lines_density() throws Exception {
+    addRawMeasure(FILE_1_REF, DUPLICATED_LINES_KEY, 2);
+    addRawMeasure(FILE_2_REF, DUPLICATED_LINES_KEY, 3);
+
+    addRawMeasure(FILE_1_REF, LINES_KEY, 2);
+    addRawMeasure(FILE_2_REF, LINES_KEY, 3);
+    addRawMeasure(DIRECTORY_REF, LINES_KEY, 5);
+    addRawMeasure(SUB_MODULE_REF, LINES_KEY, 5);
+    addRawMeasure(MODULE_REF, LINES_KEY, 5);
+    addRawMeasure(ROOT_REF, LINES_KEY, 5);
+
+    underTest.execute();
+
+    assertRawMeasureValue(FILE_1_REF, DUPLICATED_LINES_DENSITY_KEY, 100d);
+    assertRawMeasureValue(FILE_2_REF, DUPLICATED_LINES_DENSITY_KEY, 100d);
+    assertRawMeasureValue(DIRECTORY_REF, DUPLICATED_LINES_DENSITY_KEY, 100d);
+    assertRawMeasureValue(SUB_MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 100d);
+    assertRawMeasureValue(MODULE_REF, DUPLICATED_LINES_DENSITY_KEY, 100d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 100d);
+  }
+
+  private void addRawMeasure(int componentRef, String metricKey, int value) {
+    measureRepository.addRawMeasure(componentRef, metricKey, newMeasureBuilder().create(value));
+  }
+
+  private void assertNoRawMeasures(String metricKey) {
+    assertThat(measureRepository.getAddedRawMeasures(FILE_1_REF).get(metricKey)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(FILE_2_REF).get(metricKey)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(DIRECTORY_REF).get(metricKey)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(SUB_MODULE_REF).get(metricKey)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(MODULE_REF).get(metricKey)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(ROOT_REF).get(metricKey)).isEmpty();
+  }
+
+  private void assertNoRawMeasure(int componentRef, String metricKey) {
+    assertThat(measureRepository.getAddedRawMeasure(componentRef, metricKey)).isAbsent();
+  }
+
+  private void assertRawMeasureValue(int componentRef, String metricKey, int value) {
+    assertThat(measureRepository.getAddedRawMeasure(componentRef, metricKey).get().getIntValue()).isEqualTo(value);
+  }
+
+  private void assertRawMeasureValue(int componentRef, String metricKey, double value) {
+    assertThat(measureRepository.getAddedRawMeasure(componentRef, metricKey).get().getDoubleValue()).isEqualTo(value);
+  }
+
+}
diff --git a/server/sonar-server/src/test/java/org/sonar/server/computation/step/ViewsDuplicationMeasuresStepTest.java b/server/sonar-server/src/test/java/org/sonar/server/computation/step/ViewsDuplicationMeasuresStepTest.java
new file mode 100644
index 00000000000..64dd85ba8f3
--- /dev/null
+++ b/server/sonar-server/src/test/java/org/sonar/server/computation/step/ViewsDuplicationMeasuresStepTest.java
@@ -0,0 +1,379 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2014 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.server.computation.step;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.sonar.server.computation.batch.TreeRootHolderRule;
+import org.sonar.server.computation.measure.MeasureRepositoryRule;
+import org.sonar.server.computation.metric.MetricRepositoryRule;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.guava.api.Assertions.assertThat;
+import static org.sonar.api.measures.CoreMetrics.COMMENT_LINES;
+import static org.sonar.api.measures.CoreMetrics.COMMENT_LINES_KEY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_BLOCKS;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_BLOCKS_KEY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_FILES;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_FILES_KEY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_DENSITY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_DENSITY_KEY;
+import static org.sonar.api.measures.CoreMetrics.DUPLICATED_LINES_KEY;
+import static org.sonar.api.measures.CoreMetrics.LINES;
+import static org.sonar.api.measures.CoreMetrics.LINES_KEY;
+import static org.sonar.api.measures.CoreMetrics.NCLOC;
+import static org.sonar.api.measures.CoreMetrics.NCLOC_KEY;
+import static org.sonar.server.computation.component.Component.Type.PROJECT_VIEW;
+import static org.sonar.server.computation.component.Component.Type.SUBVIEW;
+import static org.sonar.server.computation.component.Component.Type.VIEW;
+import static org.sonar.server.computation.component.ViewsComponent.builder;
+import static org.sonar.server.computation.measure.Measure.newMeasureBuilder;
+
+public class ViewsDuplicationMeasuresStepTest {
+
+  private static final int ROOT_REF = 1;
+  private static final int SUBVIEW_REF = 12;
+  private static final int SUB_SUBVIEW_REF = 123;
+  private static final int PROJECT_VIEW_1_REF = 1231;
+  private static final int PROJECT_VIEW_2_REF = 1232;
+  private static final int PROJECT_VIEW_3_REF = 13;
+
+  @Rule
+  public TreeRootHolderRule treeRootHolder = new TreeRootHolderRule()
+    .setRoot(builder(VIEW, ROOT_REF)
+      .addChildren(
+          builder(SUBVIEW, SUBVIEW_REF)
+              .addChildren(
+                  builder(SUBVIEW, SUB_SUBVIEW_REF)
+                      .addChildren(
+                          builder(PROJECT_VIEW, PROJECT_VIEW_1_REF).build(),
+                          builder(PROJECT_VIEW, PROJECT_VIEW_2_REF).build())
+                      .build())
+              .build(),
+          builder(PROJECT_VIEW, PROJECT_VIEW_3_REF).build())
+      .build());
+  @Rule
+  public MetricRepositoryRule metricRepository = new MetricRepositoryRule()
+    .add(LINES)
+    .add(NCLOC)
+    .add(COMMENT_LINES)
+    .add(DUPLICATED_BLOCKS)
+    .add(DUPLICATED_FILES)
+    .add(DUPLICATED_LINES)
+    .add(DUPLICATED_LINES_DENSITY);
+  @Rule
+  public MeasureRepositoryRule measureRepository = MeasureRepositoryRule.create(treeRootHolder, metricRepository);
+
+  ComputationStep underTest = new DuplicationMeasuresStep(treeRootHolder, metricRepository, measureRepository);
+
+  @Test
+  public void aggregate_duplicated_blocks() {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_BLOCKS_KEY, 10);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_BLOCKS_KEY, 40);
+    addRawMeasure(PROJECT_VIEW_3_REF, DUPLICATED_BLOCKS_KEY, 60);
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_BLOCKS_KEY, 50);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_BLOCKS_KEY, 50);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_BLOCKS_KEY, 110);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_blocks() {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_BLOCKS_KEY, 0);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_BLOCKS_KEY, 0);
+    // no raw measure for PROJECT_VIEW_3_REF
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_BLOCKS_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_blocks_when_no_data() {
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_BLOCKS_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_BLOCKS_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_duplicated_files() {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_FILES_KEY, 10);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_FILES_KEY, 40);
+    addRawMeasure(PROJECT_VIEW_3_REF, DUPLICATED_FILES_KEY, 70);
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_FILES_KEY, 50);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_FILES_KEY, 50);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_FILES_KEY, 120);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_files() {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_FILES_KEY, 0);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_FILES_KEY, 0);
+    // no raw measure for PROJECT_VIEW_3_REF
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_FILES_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_files_when_no_data() {
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_FILES_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_FILES_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_duplicated_lines() {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_LINES_KEY, 10);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_LINES_KEY, 40);
+    addRawMeasure(PROJECT_VIEW_3_REF, DUPLICATED_LINES_KEY, 50);
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_LINES_KEY, 50);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_LINES_KEY, 50);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_KEY, 100);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_line() {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_LINES_KEY, 0);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_LINES_KEY, 0);
+    // no raw measure for PROJECT_VIEW_3_REF
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_KEY, 0);
+  }
+
+  @Test
+  public void aggregate_zero_duplicated_line_when_no_data() {
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_LINES_KEY, 0);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_KEY, 0);
+  }
+
+  @Test
+  public void compute_and_aggregate_duplicated_lines_density_using_lines() throws Exception {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_LINES_KEY, 2);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_LINES_KEY, 3);
+    addRawMeasure(PROJECT_VIEW_3_REF, DUPLICATED_LINES_KEY, 4);
+
+    addRawMeasure(PROJECT_VIEW_1_REF, LINES_KEY, 10);
+    addRawMeasure(PROJECT_VIEW_2_REF, LINES_KEY, 40);
+    addRawMeasure(PROJECT_VIEW_3_REF, LINES_KEY, 70);
+    addRawMeasure(SUB_SUBVIEW_REF, LINES_KEY, 50);
+    addRawMeasure(SUBVIEW_REF, LINES_KEY, 50);
+    addRawMeasure(ROOT_REF, LINES_KEY, 50);
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 18d);
+  }
+
+  @Test
+  public void compute_and_aggregate_duplicated_lines_density_using_nclocs_and_comment_lines() throws Exception {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_LINES_KEY, 2);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_LINES_KEY, 3);
+    addRawMeasure(PROJECT_VIEW_3_REF, DUPLICATED_LINES_KEY, 4);
+
+    addRawMeasure(PROJECT_VIEW_1_REF, COMMENT_LINES_KEY, 2);
+    addRawMeasure(PROJECT_VIEW_2_REF, COMMENT_LINES_KEY, 10);
+    addRawMeasure(PROJECT_VIEW_3_REF, COMMENT_LINES_KEY, 20);
+    addRawMeasure(SUB_SUBVIEW_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(SUBVIEW_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(ROOT_REF, COMMENT_LINES_KEY, 12);
+
+    addRawMeasure(PROJECT_VIEW_1_REF, NCLOC_KEY, 8);
+    addRawMeasure(PROJECT_VIEW_2_REF, NCLOC_KEY, 30);
+    addRawMeasure(PROJECT_VIEW_3_REF, NCLOC_KEY, 50);
+    addRawMeasure(SUB_SUBVIEW_REF, NCLOC_KEY, 38);
+    addRawMeasure(SUBVIEW_REF, NCLOC_KEY, 38);
+    addRawMeasure(ROOT_REF, NCLOC_KEY, 38);
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 18d);
+  }
+
+  @Test
+  public void compute_duplicated_lines_density_using_only_nclocs() throws Exception {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_LINES_KEY, 2);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_LINES_KEY, 3);
+
+    addRawMeasure(PROJECT_VIEW_1_REF, NCLOC_KEY, 10);
+    addRawMeasure(PROJECT_VIEW_2_REF, NCLOC_KEY, 40);
+    addRawMeasure(SUB_SUBVIEW_REF, NCLOC_KEY, 50);
+    addRawMeasure(SUBVIEW_REF, NCLOC_KEY, 50);
+    addRawMeasure(ROOT_REF, NCLOC_KEY, 50);
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 10d);
+  }
+
+  @Test
+  public void compute_zero_percent_duplicated_lines_density_when_duplicated_lines_are_zero() throws Exception {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_LINES_KEY, 0);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_LINES_KEY, 0);
+    // no raw measure for PROJECT_VIEW_3_REF
+
+    addRawMeasure(PROJECT_VIEW_1_REF, COMMENT_LINES_KEY, 2);
+    addRawMeasure(PROJECT_VIEW_2_REF, COMMENT_LINES_KEY, 10);
+    addRawMeasure(SUB_SUBVIEW_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(SUBVIEW_REF, COMMENT_LINES_KEY, 12);
+    addRawMeasure(ROOT_REF, COMMENT_LINES_KEY, 12);
+
+    addRawMeasure(PROJECT_VIEW_1_REF, NCLOC_KEY, 8);
+    addRawMeasure(PROJECT_VIEW_2_REF, NCLOC_KEY, 30);
+    addRawMeasure(SUB_SUBVIEW_REF, NCLOC_KEY, 38);
+    addRawMeasure(SUBVIEW_REF, NCLOC_KEY, 38);
+    addRawMeasure(ROOT_REF, NCLOC_KEY, 38);
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 0d);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 0d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 0d);
+  }
+
+  @Test
+  public void not_compute_duplicated_lines_density_when_lines_is_zero() throws Exception {
+    addRawMeasure(PROJECT_VIEW_1_REF, LINES_KEY, 0);
+    addRawMeasure(PROJECT_VIEW_2_REF, LINES_KEY, 0);
+    // no raw measure for PROJECT_VIEW_3_REF
+    addRawMeasure(SUB_SUBVIEW_REF, LINES_KEY, 0);
+    addRawMeasure(SUBVIEW_REF, LINES_KEY, 0);
+    addRawMeasure(ROOT_REF, LINES_KEY, 0);
+
+    underTest.execute();
+
+    assertNoRawMeasures(DUPLICATED_LINES_DENSITY_KEY);
+  }
+
+  @Test
+  public void not_compute_duplicated_lines_density_when_ncloc_and_comment_are_zero() throws Exception {
+    addRawMeasure(PROJECT_VIEW_1_REF, COMMENT_LINES_KEY, 0);
+    addRawMeasure(PROJECT_VIEW_2_REF, COMMENT_LINES_KEY, 0);
+    // no raw measure for PROJECT_VIEW_3_REF
+    addRawMeasure(SUB_SUBVIEW_REF, COMMENT_LINES_KEY, 0);
+    addRawMeasure(SUBVIEW_REF, COMMENT_LINES_KEY, 0);
+    addRawMeasure(ROOT_REF, COMMENT_LINES_KEY, 0);
+
+    addRawMeasure(PROJECT_VIEW_1_REF, NCLOC_KEY, 0);
+    addRawMeasure(PROJECT_VIEW_2_REF, NCLOC_KEY, 0);
+    addRawMeasure(SUB_SUBVIEW_REF, NCLOC_KEY, 0);
+    addRawMeasure(SUBVIEW_REF, NCLOC_KEY, 0);
+    addRawMeasure(ROOT_REF, NCLOC_KEY, 0);
+
+    underTest.execute();
+
+    assertNoRawMeasures(DUPLICATED_LINES_DENSITY_KEY);
+  }
+
+  @Test
+  public void compute_100_percent_duplicated_lines_density() throws Exception {
+    addRawMeasure(PROJECT_VIEW_1_REF, DUPLICATED_LINES_KEY, 2);
+    addRawMeasure(PROJECT_VIEW_2_REF, DUPLICATED_LINES_KEY, 3);
+    // no raw measure for PROJECT_VIEW_3_REF
+
+    addRawMeasure(PROJECT_VIEW_1_REF, LINES_KEY, 2);
+    addRawMeasure(PROJECT_VIEW_2_REF, LINES_KEY, 3);
+    addRawMeasure(SUB_SUBVIEW_REF, LINES_KEY, 5);
+    addRawMeasure(SUBVIEW_REF, LINES_KEY, 5);
+    addRawMeasure(ROOT_REF, LINES_KEY, 5);
+
+    underTest.execute();
+
+    assertNoNewRawMeasuresOnProjectViews();
+    assertRawMeasureValue(SUB_SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 100d);
+    assertRawMeasureValue(SUBVIEW_REF, DUPLICATED_LINES_DENSITY_KEY, 100d);
+    assertRawMeasureValue(ROOT_REF, DUPLICATED_LINES_DENSITY_KEY, 100d);
+  }
+
+  private void addRawMeasure(int componentRef, String metricKey, int value) {
+    measureRepository.addRawMeasure(componentRef, metricKey, newMeasureBuilder().create(value));
+  }
+
+  private void assertNoRawMeasures(String metricKey) {
+    assertThat(measureRepository.getAddedRawMeasures(PROJECT_VIEW_1_REF).get(metricKey)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(PROJECT_VIEW_2_REF).get(metricKey)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(SUB_SUBVIEW_REF).get(metricKey)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(SUBVIEW_REF).get(metricKey)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(ROOT_REF).get(metricKey)).isEmpty();
+  }
+
+  private void assertNoNewRawMeasuresOnProjectViews() {
+    assertThat(measureRepository.getAddedRawMeasures(PROJECT_VIEW_1_REF)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(PROJECT_VIEW_2_REF)).isEmpty();
+    assertThat(measureRepository.getAddedRawMeasures(PROJECT_VIEW_3_REF)).isEmpty();
+  }
+
+  private void assertNoRawMeasure(int componentRef, String metricKey) {
+    assertThat(measureRepository.getAddedRawMeasure(componentRef, metricKey)).isAbsent();
+  }
+
+  private void assertRawMeasureValue(int componentRef, String metricKey, int value) {
+    assertThat(measureRepository.getAddedRawMeasure(componentRef, metricKey).get().getIntValue()).isEqualTo(value);
+  }
+
+  private void assertRawMeasureValue(int componentRef, String metricKey, double value) {
+    assertThat(measureRepository.getAddedRawMeasure(componentRef, metricKey).get().getDoubleValue()).isEqualTo(value);
+  }
+
+}