Add test for KT-20007

idea/testData/quickfix/implement/doNotAddExpectForVal.kt.after

@@ -0,0 +1,20 @@
+// "Implement members" "true"
+// ENABLE_MULTIPLATFORM
+// ERROR: Expected interface 'InterfaceWithVals' has no actual declaration in module light_idea_test_case for JVM
+
+fun TODO(s: String): Nothing = null!!
+
+expect interface InterfaceWithVals {
+    fun funInInterface()
+
+    val importantVal: Int
+}
+
+class ChildOfInterface : InterfaceWithVals{
+    override fun funInInterface() {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override val importantVal: Int
+        get() = TODO("not implemented") //To change initializer of created properties use File | Settings | File Templates.
+}