Add a regression test for b/188314422

PiperOrigin-RevId: 374800951
google · May 20, 2021 · 2241386 · 2241386
1 parent 4fa4727
commit 2241386
Showing 1 changed file with 33 additions and 0 deletions.
diff --git a/core/src/test/java/com/google/errorprone/bugpatterns/UnusedVariableTest.java b/core/src/test/java/com/google/errorprone/bugpatterns/UnusedVariableTest.java
@@ -1287,4 +1287,37 @@ public void exemptedMethods() {
             "}")
         .doTest();
   }
+
+  @Ignore("b/188314422")
+  @Test
+  public void unusedReassignment() {
+    new Exception();
+    refactoringHelper
+        .addInputLines(
+            "Test.java",
+            "import java.util.ArrayList;",
+            "import java.util.Collection;",
+            "import java.util.List;",
+            "import static java.util.stream.Collectors.toList;",
+            "public class Test {",
+            "  public void f(List<List<String>> lists) {",
+            "    List<String> result =",
+            "        lists.stream().collect(ArrayList::new, Collection::addAll,"
+                + " Collection::addAll);",
+            "    result = lists.stream().collect(ArrayList::new, ArrayList::addAll,"
+                + " ArrayList::addAll);",
+            "  }",
+            "}")
+        .addOutputLines(
+            "Test.java",
+            "import java.util.ArrayList;",
+            "import java.util.Collection;",
+            "import java.util.List;",
+            "import static java.util.stream.Collectors.toList;",
+            "public class Test {",
+            "  public void f(List<List<String>> lists) {",
+            "  }",
+            "}")
+        .doTest();
+  }
 }