Fix ChangeInfoDiffer.getAddedForMap method
The method fails with exception NullPointerException when oldMap is
null. The problem appears in [1] after adding removableLabels to the
ChangeInfo.
[1] https://gerrit-review.git.corp.google.com/c/gerrit/+/355394
Issue: Google b/264883623
Change-Id: I7d032f7365e7383b07d41a6dbaf7dcca3d82e6b9
Release-Notes:skip
diff --git a/java/com/google/gerrit/extensions/common/ChangeInfoDiffer.java b/java/com/google/gerrit/extensions/common/ChangeInfoDiffer.java
index 24182cc..51c35dc 100644
--- a/java/com/google/gerrit/extensions/common/ChangeInfoDiffer.java
+++ b/java/com/google/gerrit/extensions/common/ChangeInfoDiffer.java
@@ -150,16 +150,17 @@
/** Returns {@code null} if nothing has been added to {@code oldCollection} */
@Nullable
private static ImmutableList<?> getAddedForCollection(
- Collection<?> oldCollection, Collection<?> newCollection) {
- ImmutableList<?> notInOldCollection = getAdditions(oldCollection, newCollection);
+ @Nullable Collection<?> oldCollection, Collection<?> newCollection) {
+ ImmutableList<?> notInOldCollection = getAdditionsForCollection(oldCollection, newCollection);
return notInOldCollection.isEmpty() ? null : notInOldCollection;
}
@Nullable
- private static ImmutableList<Object> getAdditions(
- Collection<?> oldCollection, Collection<?> newCollection) {
- if (oldCollection == null)
- return newCollection != null ? ImmutableList.copyOf(newCollection) : null;
+ private static ImmutableList<Object> getAdditionsForCollection(
+ @Nullable Collection<?> oldCollection, Collection<?> newCollection) {
+ if (oldCollection == null) {
+ return ImmutableList.copyOf(newCollection);
+ }
Map<Object, List<Object>> duplicatesMap = newCollection.stream().collect(groupingBy(v -> v));
oldCollection.forEach(
@@ -173,7 +174,18 @@
/** Returns {@code null} if nothing has been added to {@code oldMap} */
@Nullable
- private static ImmutableMap<Object, Object> getAddedForMap(Map<?, ?> oldMap, Map<?, ?> newMap) {
+ private static ImmutableMap<Object, Object> getAddedForMap(
+ @Nullable Map<?, ?> oldMap, Map<?, ?> newMap) {
+ ImmutableMap<Object, Object> notInOldMap = getAdditionsForMap(oldMap, newMap);
+ return notInOldMap.isEmpty() ? null : notInOldMap;
+ }
+
+ @Nullable
+ private static ImmutableMap<Object, Object> getAdditionsForMap(
+ @Nullable Map<?, ?> oldMap, Map<?, ?> newMap) {
+ if (oldMap == null) {
+ return ImmutableMap.copyOf(newMap);
+ }
ImmutableMap.Builder<Object, Object> additionsBuilder = ImmutableMap.builder();
for (Map.Entry<?, ?> entry : newMap.entrySet()) {
Object added = getAdded(oldMap.get(entry.getKey()), entry.getValue());
@@ -181,8 +193,7 @@
additionsBuilder.put(entry.getKey(), added);
}
}
- ImmutableMap<Object, Object> additions = additionsBuilder.build();
- return additions.isEmpty() ? null : additions;
+ return additionsBuilder.build();
}
private static Object get(Field field, Object obj) {
diff --git a/javatests/com/google/gerrit/extensions/common/ChangeInfoDifferTest.java b/javatests/com/google/gerrit/extensions/common/ChangeInfoDifferTest.java
index 7ed236a..f45d33b 100644
--- a/javatests/com/google/gerrit/extensions/common/ChangeInfoDifferTest.java
+++ b/javatests/com/google/gerrit/extensions/common/ChangeInfoDifferTest.java
@@ -48,6 +48,7 @@
assertThat(diff.added().messages).isNull();
assertThat(diff.added().reviewers).isNull();
assertThat(diff.added().hashtags).isNull();
+ assertThat(diff.added().removableLabels).isNull();
assertThat(diff.removed()._number).isNull();
assertThat(diff.removed().branch).isNull();
assertThat(diff.removed().project).isNull();
@@ -56,6 +57,7 @@
assertThat(diff.removed().messages).isNull();
assertThat(diff.removed().reviewers).isNull();
assertThat(diff.removed().hashtags).isNull();
+ assertThat(diff.removed().removableLabels).isNull();
}
@Test
@@ -315,6 +317,295 @@
}
@Test
+ public void getDiff_removableLabelsEmpty_returnsNullRemovableLabels() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ oldChangeInfo.removableLabels = ImmutableMap.of();
+ newChangeInfo.removableLabels = ImmutableMap.of();
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels).isNull();
+ assertThat(diff.removed().removableLabels).isNull();
+ }
+
+ @Test
+ public void getDiff_removableLabelsNullAndEmpty_returnsEmptyRemovableLabels() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ newChangeInfo.removableLabels = ImmutableMap.of();
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels).isEmpty();
+ assertThat(diff.removed().removableLabels).isNull();
+ }
+
+ @Test
+ public void getDiff_removableLabelsEmptyAndNull_returnsEmptyRemovableLabels() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ oldChangeInfo.removableLabels = ImmutableMap.of();
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels).isNull();
+ assertThat(diff.removed().removableLabels).isEmpty();
+ }
+
+ @Test
+ public void getDiff_removableLabelsLabelAdded() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "Cow";
+ AccountInfo acc2 = new AccountInfo();
+ acc2.name = "Pig";
+ AccountInfo acc3 = new AccountInfo();
+ acc3.name = "Cat";
+ AccountInfo acc4 = new AccountInfo();
+ acc4.name = "Dog";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of(
+ "Code-Review",
+ ImmutableMap.of("+1", ImmutableList.of(acc1), "-1", ImmutableList.of(acc2, acc3)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of(
+ "Code-Review",
+ ImmutableMap.of("+1", ImmutableList.of(acc1), "-1", ImmutableList.of(acc2, acc3)),
+ "Verified",
+ ImmutableMap.of("-1", ImmutableList.of(acc4)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Verified", ImmutableMap.of("-1", ImmutableList.of(acc4))));
+ assertThat(diff.removed().removableLabels).isNull();
+ }
+
+ @Test
+ public void getDiff_removableLabelsLabelRemoved() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "Cow";
+ AccountInfo acc2 = new AccountInfo();
+ acc2.name = "Pig";
+ AccountInfo acc3 = new AccountInfo();
+ acc3.name = "Cat";
+ AccountInfo acc4 = new AccountInfo();
+ acc4.name = "Dog";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of(
+ "Code-Review",
+ ImmutableMap.of("+1", ImmutableList.of(acc1), "-1", ImmutableList.of(acc2, acc3)),
+ "Verified",
+ ImmutableMap.of("-1", ImmutableList.of(acc4)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of(
+ "Code-Review",
+ ImmutableMap.of("+1", ImmutableList.of(acc1), "-1", ImmutableList.of(acc2, acc3)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels).isNull();
+ assertThat(diff.removed().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Verified", ImmutableMap.of("-1", ImmutableList.of(acc4))));
+ }
+
+ @Test
+ public void getDiff_removableLabelsVoteAdded() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "acc1";
+ AccountInfo acc2 = new AccountInfo();
+ acc2.name = "acc2";
+ AccountInfo acc3 = new AccountInfo();
+ acc3.name = "acc3";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of(
+ "Code-Review",
+ ImmutableMap.of("+1", ImmutableList.of(acc1), "-1", ImmutableList.of(acc2, acc3)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("-1", ImmutableList.of(acc2, acc3))));
+ assertThat(diff.removed().removableLabels).isNull();
+ }
+
+ @Test
+ public void getDiff_removableLabelsVoteRemoved() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "acc1";
+ AccountInfo acc2 = new AccountInfo();
+ acc2.name = "acc2";
+ AccountInfo acc3 = new AccountInfo();
+ acc3.name = "acc3";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of(
+ "Code-Review",
+ ImmutableMap.of("+1", ImmutableList.of(acc1), "-1", ImmutableList.of(acc2, acc3)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels).isNull();
+ assertThat(diff.removed().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("-1", ImmutableList.of(acc2, acc3))));
+ }
+
+ @Test
+ public void getDiff_removableLabelsAccountAdded() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "acc1";
+ AccountInfo acc2 = new AccountInfo();
+ acc2.name = "acc2";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1, acc2)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc2))));
+ assertThat(diff.removed().removableLabels).isNull();
+ }
+
+ @Test
+ public void getDiff_removableLabelsAccountRemoved() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "acc1";
+ AccountInfo acc2 = new AccountInfo();
+ acc2.name = "acc2";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1, acc2)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc2))));
+ assertThat(diff.removed().removableLabels).isNull();
+ }
+
+ @Test
+ public void getDiff_removableLabelsAccountChanged() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "acc1";
+ AccountInfo acc2 = new AccountInfo();
+ acc2.name = "acc2";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc2)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc2))));
+ assertThat(diff.removed().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1))));
+ }
+
+ @Test
+ public void getDiff_removableLabelsScoreChanged() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "acc1";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("-1", ImmutableList.of(acc1)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("-1", ImmutableList.of(acc1))));
+ assertThat(diff.removed().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1))));
+ }
+
+ @Test
+ public void getDiff_removableLabelsLabelChanged() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "acc1";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of("Verified", ImmutableMap.of("+1", ImmutableList.of(acc1)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Verified", ImmutableMap.of("+1", ImmutableList.of(acc1))));
+ assertThat(diff.removed().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1))));
+ }
+
+ @Test
+ public void getDiff_removableLabelsLabelScoreAndAccountChanged() {
+ ChangeInfo oldChangeInfo = new ChangeInfo();
+ ChangeInfo newChangeInfo = new ChangeInfo();
+ AccountInfo acc1 = new AccountInfo();
+ acc1.name = "acc1";
+ AccountInfo acc2 = new AccountInfo();
+ acc2.name = "acc2";
+
+ oldChangeInfo.removableLabels =
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1)));
+ newChangeInfo.removableLabels =
+ ImmutableMap.of("Verified", ImmutableMap.of("-1", ImmutableList.of(acc2)));
+
+ ChangeInfoDifference diff = ChangeInfoDiffer.getDifference(oldChangeInfo, newChangeInfo);
+
+ assertThat(diff.added().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Verified", ImmutableMap.of("-1", ImmutableList.of(acc2))));
+ assertThat(diff.removed().removableLabels)
+ .containsExactlyEntriesIn(
+ ImmutableMap.of("Code-Review", ImmutableMap.of("+1", ImmutableList.of(acc1))));
+ }
+
+ @Test
public void getDiff_assertCanConstructAllChangeInfoReferences() throws Exception {
buildObjectWithFullFields(ChangeInfo.class);
}
