IDEA-185819 Operator ! cannot be applied to void: add a quick-fix

java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightUtil.java

@@ -1430,6 +1430,12 @@ public class HighlightUtil extends HighlightUtilBase {
         HighlightInfo.newHighlightInfo(HighlightInfoType.ERROR).range(parentExpr).descriptionAndTooltip(message).create();
       if (parentExpr instanceof PsiPrefixExpression && token.getTokenType() == JavaTokenType.EXCL) {
         QuickFixAction.registerQuickFixAction(highlightInfo, QUICK_FIX_FACTORY.createNegationBroadScopeFix((PsiPrefixExpression)parentExpr));
+        if (expression instanceof PsiMethodCallExpression) {
+          PsiMethod method = ((PsiMethodCallExpression)expression).resolveMethod();
+          if (method != null) {
+            QuickFixAction.registerQuickFixAction(highlightInfo, QUICK_FIX_FACTORY.createMethodReturnFix(method, PsiType.BOOLEAN, true));
+          }
+        }
       }
       return highlightInfo;
     }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/methodReturnBooleanFix/afterNegated.java

@@ -0,0 +1,16 @@
+// "Make 'victim' return 'boolean'" "true"
+class Test {
+    public void trigger() {
+        if (!victim()) {
+            System.out.println("***");
+        }
+    }
+
+    public boolean victim() {
+        final int something = 1;
+        final boolean value = false;
+        int another = 10;
+        final boolean secondBoolean = another == something;
+        return value;
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/methodReturnBooleanFix/beforeNegated.java

@@ -0,0 +1,15 @@
+// "Make 'victim' return 'boolean'" "true"
+class Test {
+    public void trigger() {
+        if (!<caret>victim()) {
+            System.out.println("***");
+        }
+    }
+
+    public void victim() {
+        final int something = 1;
+        final boolean value = false;
+        int another = 10;
+        final boolean secondBoolean = another == something;
+    }
+}