KT-2752: add diagnostic that reports about applying JsName on overridden declarations

compiler/testData/diagnostics/testsWithJsStdLib/name/jsNameOnOverride.kt

@@ -0,0 +1,19 @@
+package foo
+
+open class A {
+    @JsName("foo_") open fun foo() = 23
+
+    @JsName("bar_") open val bar = 123
+
+    open val baz: Int
+        @JsName("getBaz_") get() = 55
+}
+
+class B : A() {
+    <!JS_NAME_PROHIBITED_FOR_OVERRIDE!>@JsName("foo__")<!> override fun foo() = 42
+
+    <!JS_NAME_PROHIBITED_FOR_OVERRIDE!>@JsName("bar__")<!> override val bar = 142
+
+    override val baz: Int
+        <!JS_NAME_PROHIBITED_FOR_OVERRIDE!>@JsName("getBaz__")<!> get() = 155
+}

compiler/testData/diagnostics/testsWithJsStdLib/name/jsNameOnOverride.txt

@@ -0,0 +1,24 @@
+package
+
+package foo {
+
+    public open class A {
+        public constructor A()
+        @kotlin.js.JsName(name = "bar_") public open val bar: kotlin.Int = 123
+        public open val baz: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        @kotlin.js.JsName(name = "foo_") public open fun foo(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class B : foo.A {
+        public constructor B()
+        @kotlin.js.JsName(name = "bar__") public open override /*1*/ val bar: kotlin.Int = 142
+        public open override /*1*/ val baz: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        @kotlin.js.JsName(name = "foo__") public open override /*1*/ fun foo(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestWithJsStdLibGenerated.java

@@ -337,6 +337,12 @@ public class DiagnosticsTestWithJsStdLibGenerated extends AbstractDiagnosticsTes
             doTest(fileName);
         }
 
+        @TestMetadata("jsNameOnOverride.kt")
+        public void testJsNameOnOverride() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithJsStdLib/name/jsNameOnOverride.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("jsNameOnPropertyAndAccessor.kt")
         public void testJsNameOnPropertyAndAccessor() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithJsStdLib/name/jsNameOnPropertyAndAccessor.kt");

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/DefaultErrorMessagesJs.kt

@@ -42,6 +42,7 @@ private val DIAGNOSTIC_FACTORY_TO_RENDERER by lazy {
         put(ErrorsJs.JS_NAME_ON_PRIMARY_CONSTRUCTOR_PROHIBITED, "@JsName annotation is prohibited for primary constructors")
         put(ErrorsJs.JS_NAME_ON_ACCESSOR_AND_PROPERTY, "@JsName can be either on a property or its accessors, not both of them")
         put(ErrorsJs.JS_NAME_IS_NOT_ON_ALL_ACCESSORS, "@JsName should be on all of the property accessors")
+        put(ErrorsJs.JS_NAME_PROHIBITED_FOR_OVERRIDE, "@JsName is prohibited for overridden members")
 
         this
     }

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/ErrorsJs.java

@@ -49,6 +49,7 @@ public interface ErrorsJs {
     DiagnosticFactory0<KtElement> JS_NAME_ON_PRIMARY_CONSTRUCTOR_PROHIBITED = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<KtElement> JS_NAME_ON_ACCESSOR_AND_PROPERTY = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<PsiElement> JS_NAME_IS_NOT_ON_ALL_ACCESSORS = DiagnosticFactory0.create(ERROR);
+    DiagnosticFactory0<PsiElement> JS_NAME_PROHIBITED_FOR_OVERRIDE = DiagnosticFactory0.create(ERROR);
 
     @SuppressWarnings("UnusedDeclaration")
     Object _initializer = new Object() {

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/JsNameChecker.kt

@@ -16,10 +16,7 @@
 
 package org.jetbrains.kotlin.js.resolve.diagnostics
 
-import org.jetbrains.kotlin.descriptors.ConstructorDescriptor
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
-import org.jetbrains.kotlin.descriptors.PropertyAccessorDescriptor
-import org.jetbrains.kotlin.descriptors.PropertyDescriptor
+import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.diagnostics.DiagnosticSink
 import org.jetbrains.kotlin.js.translate.utils.AnnotationsUtils
 import org.jetbrains.kotlin.psi.KtDeclaration
@@ -39,6 +36,10 @@ object JsNameChecker : SimpleDeclarationChecker {
         if (AnnotationsUtils.getJsName(descriptor) == null) return
         val jsNamePsi = AnnotationsUtils.getJsNameAnnotationPsi(bindingContext, declaration, descriptor) ?: return
 
+        if (descriptor is CallableMemberDescriptor && descriptor.overriddenDescriptors.isNotEmpty()) {
+            diagnosticHolder.report(ErrorsJs.JS_NAME_PROHIBITED_FOR_OVERRIDE.on(jsNamePsi))
+        }
+
         when (descriptor) {
             is ConstructorDescriptor -> {
                 if (descriptor.isPrimary) {