[K/JS] Fix interfaces inside TypeScript definitions if they have only an external interface parent ^KT-64708 Fixed

Merge-request: KT-MR-14665
Merged-by: Artem Kobzar <Artem.Kobzar@jetbrains.com>

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/export/ExportModelGenerator.kt

@@ -379,7 +379,7 @@ class ExportModelGenerator(val context: JsIrBackendContext, val generateNamespac
     private fun IrClass.shouldContainImplementationOfMagicProperty(superTypes: Iterable<IrType>): Boolean {
         return !isExternal && superTypes.any {
             val superClass = it.classOrNull?.owner ?: return@any false
-            superClass.isInterface && superClass.isExported(context) || superClass.isJsImplicitExport()
+            superClass.isInterface && it.shouldAddMagicPropertyOfSuper() || superClass.isJsImplicitExport()
         }
     }
 

js/js.translator/testData/typescript-export/interfaces-in-exported-file/interfaces.d.ts

@@ -5,6 +5,8 @@ declare namespace JS_TESTS {
             readonly required: number;
             readonly notRequired?: Nullable<number>;
         }
+        interface ExportedParentInterface {
+        }
     }
     namespace foo {
         interface TestInterface {
@@ -45,5 +47,11 @@ declare namespace JS_TESTS {
                 readonly "foo.InterfaceWithCompanion": unique symbol;
             };
         }
+        interface ExportedChildInterface extends foo.ExportedParentInterface {
+            bar(): void;
+            readonly __doNotUseOrImplementIt: {
+                readonly "foo.ExportedChildInterface": unique symbol;
+            };
+        }
     }
 }

js/js.translator/testData/typescript-export/interfaces-in-exported-file/interfaces.kt

@@ -65,4 +65,12 @@ interface InterfaceWithCompanion {
     companion object {
         fun foo() = "String"
     }
+}
+
+
+external interface ExportedParentInterface
+
+
+interface ExportedChildInterface : ExportedParentInterface {
+    fun bar()
 }

js/js.translator/testData/typescript-export/interfaces/interfaces.d.ts

@@ -5,6 +5,8 @@ declare namespace JS_TESTS {
             readonly required: number;
             readonly notRequired?: Nullable<number>;
         }
+        interface ExportedParentInterface {
+        }
     }
     namespace foo {
         interface TestInterface {
@@ -45,5 +47,11 @@ declare namespace JS_TESTS {
                 readonly "foo.InterfaceWithCompanion": unique symbol;
             };
         }
+        interface ExportedChildInterface extends foo.ExportedParentInterface {
+            bar(): void;
+            readonly __doNotUseOrImplementIt: {
+                readonly "foo.ExportedChildInterface": unique symbol;
+            };
+        }
     }
 }

js/js.translator/testData/typescript-export/interfaces/interfaces.kt

@@ -61,4 +61,12 @@ interface InterfaceWithCompanion {
     companion object {
         fun foo() = "String"
     }
+}
+
+@JsExport
+external interface ExportedParentInterface
+
+@JsExport
+interface ExportedChildInterface : ExportedParentInterface {
+    fun bar()
 }