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author | Sébastien Lesaint <sebastien.lesaint@sonarsource.com> | 2016-07-20 18:10:01 +0200 |
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committer | Sébastien Lesaint <sebastien.lesaint@sonarsource.com> | 2016-07-21 17:03:57 +0200 |
commit | 1bb0e1cfd1aa5f2de1d20d6d9a10af3803dde057 (patch) | |
tree | 0000a1b57d84753c7a19e811439c57b9a9bafd3b /sonar-core/src/test | |
parent | 8a59810c57e65e6dbbe8245dfcbce25e96cd4dc1 (diff) | |
download | sonarqube-1bb0e1cfd1aa5f2de1d20d6d9a10af3803dde057.tar.gz sonarqube-1bb0e1cfd1aa5f2de1d20d6d9a10af3803dde057.zip |
add Collectors.join(Joiner)
Diffstat (limited to 'sonar-core/src/test')
-rw-r--r-- | sonar-core/src/test/java/org/sonar/core/util/stream/CollectorsTest.java | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/sonar-core/src/test/java/org/sonar/core/util/stream/CollectorsTest.java b/sonar-core/src/test/java/org/sonar/core/util/stream/CollectorsTest.java index 9bac9ee7d8f..a5d9466a494 100644 --- a/sonar-core/src/test/java/org/sonar/core/util/stream/CollectorsTest.java +++ b/sonar-core/src/test/java/org/sonar/core/util/stream/CollectorsTest.java @@ -19,6 +19,7 @@ */ package org.sonar.core.util.stream; +import com.google.common.base.Joiner; import com.google.common.collect.ImmutableList; import com.google.common.collect.ImmutableSet; import com.google.common.collect.Multimap; @@ -37,6 +38,7 @@ import static org.assertj.core.api.Assertions.assertThat; import static org.assertj.core.api.Assertions.entry; import static org.assertj.guava.api.Assertions.assertThat; import static org.sonar.core.util.stream.Collectors.index; +import static org.sonar.core.util.stream.Collectors.join; import static org.sonar.core.util.stream.Collectors.toArrayList; import static org.sonar.core.util.stream.Collectors.toHashSet; import static org.sonar.core.util.stream.Collectors.toList; @@ -351,6 +353,34 @@ public class CollectorsTest { assertThat(multimap).contains(entry(1, "A"), entry(2, "B"), entry(3, "C")); } + @Test + public void join_on_empty_stream_returns_empty_string() { + assertThat(Collections.emptyList().stream().collect(join(Joiner.on(",")))).isEmpty(); + } + + @Test + public void join_fails_with_NPE_if_joiner_is_null() { + expectedException.expect(NullPointerException.class); + expectedException.expectMessage("Joiner can't be null"); + + join(null); + } + + @Test + public void join_applies_joiner_to_stream() { + assertThat(Arrays.asList("1", "2", "3", "4").stream().collect(join(Joiner.on(",")))) + .isEqualTo("1,2,3,4"); + } + + @Test + public void join_supports_null_if_joiner_does() { + Stream<String> stream = Arrays.asList("1", null).stream(); + + expectedException.expect(NullPointerException.class); + + stream.collect(join(Joiner.on(","))); + } + private void expectedDuplicateKey1IAE() { expectedException.expect(IllegalArgumentException.class); expectedException.expectMessage("Duplicate key 1"); |