SONAR-22727 Add new software qualities maintainability measures

2 files changed, 26 insertions, 0 deletions

diff --git a/server/sonar-server-common/src/main/java/org/sonar/server/measure/DebtRatingGrid.java b/server/sonar-server-common/src/main/java/org/sonar/server/measure/DebtRatingGrid.java
index 247a1829f98..4bbc2b54ac7 100644
--- a/server/sonar-server-common/src/main/java/org/sonar/server/measure/DebtRatingGrid.java
+++ b/server/sonar-server-common/src/main/java/org/sonar/server/measure/DebtRatingGrid.java
@@ -78,6 +78,17 @@ public class DebtRatingGrid {
       .orElseThrow(() -> new IllegalArgumentException(format("Invalid value '%s'", value)));
   }
 
+  /**
+   * Computes a rating from A to D, where E is converted to D.
+   */
+  public Rating getAToDRatingForDensity(double value) {
+    return ratingBounds.entrySet().stream()
+      .filter(e -> e.getValue().match(value))
+      .map(e -> e.getKey() == E ? D : e.getKey())
+      .findFirst()
+      .orElseThrow(() -> new IllegalArgumentException(format("Invalid value '%s'", value)));
+  }
+
   public double getGradeLowerBound(Rating rating) {
     if (rating.getIndex() > 1) {
       return gridValues[rating.getIndex() - 2];
diff --git a/server/sonar-server-common/src/test/java/org/sonar/server/measure/DebtRatingGridTest.java b/server/sonar-server-common/src/test/java/org/sonar/server/measure/DebtRatingGridTest.java
index 8a312cba599..6557e108815 100644
--- a/server/sonar-server-common/src/test/java/org/sonar/server/measure/DebtRatingGridTest.java
+++ b/server/sonar-server-common/src/test/java/org/sonar/server/measure/DebtRatingGridTest.java
@@ -55,6 +55,21 @@ public class DebtRatingGridTest {
   }
 
   @Test
+  public void getAToDRatingForDensity_returnsValueBetweenAAndD() {
+    assertThat(ratingGrid.getAToDRatingForDensity(0)).isEqualTo(A);
+    assertThat(ratingGrid.getAToDRatingForDensity(0.05)).isEqualTo(A);
+    assertThat(ratingGrid.getAToDRatingForDensity(0.09999999)).isEqualTo(A);
+    assertThat(ratingGrid.getAToDRatingForDensity(0.1)).isEqualTo(A);
+    assertThat(ratingGrid.getAToDRatingForDensity(0.15)).isEqualTo(B);
+    assertThat(ratingGrid.getAToDRatingForDensity(0.2)).isEqualTo(B);
+    assertThat(ratingGrid.getAToDRatingForDensity(0.25)).isEqualTo(C);
+    assertThat(ratingGrid.getAToDRatingForDensity(0.5)).isEqualTo(C);
+    assertThat(ratingGrid.getAToDRatingForDensity(0.65)).isEqualTo(D);
+    assertThat(ratingGrid.getAToDRatingForDensity(1)).isEqualTo(D);
+    assertThat(ratingGrid.getAToDRatingForDensity(1.01)).isEqualTo(D);
+  }
+
+  @Test
   public void density_matching_exact_grid_values() {
     assertThat(ratingGrid.getRatingForDensity(0.1)).isEqualTo(A);
     assertThat(ratingGrid.getRatingForDensity(0.2)).isEqualTo(B);