unused assignment: respect report initialization setting in fields (IDEA-183162)

java/java-analysis-impl/src/com/intellij/codeInspection/defUse/DefUseInspectionBase.java

@@ -158,7 +158,9 @@ public class DefUseInspectionBase extends AbstractBaseJavaLocalInspectionTool {
     for (final FieldWrite fieldWrite : fieldWrites) {
       if (wasDefinitelyAssigned) {
         if (fieldWrite.isInitializer()) {
-          reportInitializerProblem(field, holder, isOnTheFly);
+          if (REPORT_REDUNDANT_INITIALIZER) {
+            reportInitializerProblem(field, holder, isOnTheFly);
+          }
         }
         else {
           for (PsiAssignmentExpression assignment : fieldWrite.getAssignments()) {

java/java-tests/testData/inspection/defUse/FieldIgnoringRedundantInitializer.java

+class C {
+  private String str = null;
+}
\ No newline at end of file

java/java-tests/testSrc/com/intellij/java/codeInspection/DefUseTest.java

@@ -57,6 +57,12 @@ public class DefUseTest extends LightCodeInsightFixtureTestCase {
   public void testNestedTryFinallyInEndlessLoop() { doTest(); }
   public void testNestedTryFinallyInForLoop() { doTest(); }
   public void testFieldInitializer() { doTest(); }
+  public void testFieldIgnoringRedundantInitializer() {
+    DefUseInspection inspection = new DefUseInspection();
+    inspection.REPORT_REDUNDANT_INITIALIZER = false;
+    myFixture.enableInspections(inspection);
+    myFixture.testHighlighting(getTestName(false) + ".java");
+  }
 
   private void doTest() {
     myFixture.enableInspections(new DefUseInspection());