change signature: conflict if deleted parameter is used in method body, excluding javadoc (IDEA-157603)

java/java-tests/testData/refactoring/changeSignature/ConflictForUsedParametersInMethodBody.java

@@ -0,0 +1,9 @@
+class A {
+  void f<caret>oo(int i) {}
+}
+
+class B extends A {
+  void foo(int i) {
+    System.out.println(i);
+  }
+}

java/java-tests/testSrc/com/intellij/refactoring/ChangeSignatureGestureTest.java

@@ -169,7 +169,13 @@ public class ChangeSignatureGestureTest extends LightCodeInsightFixtureTestCase
   }
 
   public void testDeleteParamInSuperUsed() {
-    doDeleteTest();
+    try {
+      BaseRefactoringProcessor.ConflictsInTestsException.setTestIgnore(true);
+      doDeleteTest();
+    }
+    finally {
+      BaseRefactoringProcessor.ConflictsInTestsException.setTestIgnore(false);
+    }
   }
 
   private void doDeleteTest() {

java/java-tests/testSrc/com/intellij/refactoring/ChangeSignatureTest.java

@@ -68,6 +68,14 @@ public class ChangeSignatureTest extends ChangeSignatureBaseTest {
     catch (BaseRefactoringProcessor.ConflictsInTestsException ignored) { }
   }
 
+  public void testConflictForUsedParametersInMethodBody() throws Exception {
+    try {
+      doTest(null, new ParameterInfoImpl[0], true);
+      fail("Conflict expected");
+    }
+    catch (BaseRefactoringProcessor.ConflictsInTestsException ignored) { }
+  }
+
   public void testGenericTypes() {
     doTest(null, null, "T", method -> new ParameterInfoImpl[]{
       new ParameterInfoImpl(-1, "x", myFactory.createTypeFromText("T", method.getParameterList()), "null"),