KT-6201 KT-6203 KT-6326 KT-6777 Add test cases to prove that issues are no longer reproducible

js/js.translator/testData/classObject/cases/enumCompanionObject.kt

@@ -0,0 +1,15 @@
+// See KT-6326, KT-6777
+package foo
+
+enum class Foo {
+    A;
+
+    companion object {
+        val a = A
+    }
+}
+
+fun box(): String {
+    assertEquals("A", Foo.a.name)
+    return "OK"
+}

js/js.translator/testData/classObject/cases/objectInCompanionObject.kt

@@ -0,0 +1,25 @@
+// See KT-6203
+package foo
+
+class TestClass {
+    object a {
+        override fun toString() = "a"
+    }
+
+    companion object {
+        object b {
+            override fun toString() = "b"
+        }
+    }
+
+    fun test() = convert(a) + convert(b)
+}
+
+fun convert(o: Any) = o.toString()
+
+fun box(): String {
+    assertEquals("ab", TestClass().test())
+    assertEquals("ab2", convert(TestClass.a) + convert(TestClass.Companion.b) + "2")
+
+    return "OK"
+}