same parameter value inspection should not warn if method is used in method reference expression (IDEA-207552)

java/java-analysis-impl/src/com/intellij/codeInspection/reference/RefJavaUtilImpl.java

@@ -401,6 +401,7 @@ public class RefJavaUtilImpl extends RefJavaUtil {
           !PsiType.VOID
             .equals(LambdaUtil.getFunctionalInterfaceReturnType(getFunctionalInterfaceType((UCallableReferenceExpression)refExpression)))) {
         refMethod.setReturnValueUsed(true);
+        refMethod.setParametersAreUnknown();
         addTypeReference(uFrom, returnType, refFrom.getRefManager());
       }
       return;

java/java-analysis-impl/src/com/intellij/codeInspection/reference/RefMethodImpl.java

@@ -152,6 +152,15 @@ public class RefMethodImpl extends RefJavaElementImpl implements RefMethod {
     }
   }
 
+  public void setParametersAreUnknown() {
+    for (RefParameter parameter : myParameters) {
+      ((RefParameterImpl)parameter).clearTemplateValue();
+    }
+    for (RefMethod method : getSuperMethods()) {
+      ((RefMethodImpl)method).setParametersAreUnknown();
+    }
+  }
+
   private static boolean isAppMain(PsiMethod psiMethod, RefMethod refMethod) {
     if (!refMethod.isStatic()) return false;
     if (!PsiType.VOID.equals(psiMethod.getReturnType())) return false;

java/java-tests/testData/inspection/sameParameterValue/methodReferences/expected.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems/>
+

java/java-tests/testData/inspection/sameParameterValue/methodReferences/src/Test.java

@@ -0,0 +1,14 @@
+public class Test {
+
+
+  public void foo() {
+    bar(null);
+
+    List<String> strings = Collections.singletonList("NotNull!");
+    strings.forEach(this::bar);
+  }
+
+  private void bar(@Nullable String goo) {
+    System.out.println(goo);
+  }
+}

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

@@ -94,4 +94,8 @@ public class SameParameterValueLocalTest extends InspectionTestCase {
   public void testOverrideGroovy() {
     doTest(getGlobalTestDir(), myTool);
   }
+
+  public void testMethodReferences() {
+    doTest(getGlobalTestDir(), myTool);
+  }
 }

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

@@ -105,4 +105,8 @@ public class SameParameterValueTest extends InspectionTestCase {
   public void testOverrideGroovy() {
     doTest(getTestDir(), myTool, false, true);
   }
+
+  public void testMethodReferences() {
+    doTest(getTestDir(), myTool, false, true);
+  }
 }