#3180. Add JSExport tests. Part 4.

LibTest/js_interop/JSExport/jsExport_A05_t01.dart

@@ -0,0 +1,67 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion If members are overridden, only the overriding member will be
+/// wrapped as long as it or its class has this annotation.
+///
+/// @description Checks that if members are overridden, only the overriding
+/// members are wrapped. Test that invocation of wrapping JS object member
+/// invokes corresponding overridden member of the Dart object.
+/// @author sgrekhov22@gmail.com
+
+import 'dart:js_interop';
+import 'dart:js_interop_unsafe';
+import '../../../Utils/expect.dart';
+import '../js_utils.dart';
+
+String log = "";
+
+@JSExport()
+class A {
+  int variable = 0;
+  String method(String v) => "method($v);";
+  String get getter => "getter";
+  void set setter(bool value) {
+    log = "setter($value);";
+  }
+}
+
+@JSExport()
+class C extends A {
+  @override
+  int variable = 42;
+
+  @override
+  String method(String v) => "Overridden method($v);";
+
+  @override
+  String get getter => "Overridden getter";
+
+  @override
+  void set setter(bool value) {
+    log = "Overridden setter($value);";
+  }
+}
+
+void main() {
+  doTest(createJSInteropWrapper<C>(C()));
+  doTest(createJSInteropWrapper<A>(C()));
+}
+
+void doTest(JSObject jsC) {
+  globalContext["jsC"] = jsC;
+  eval(r'''
+    globalThis.v1 = globalThis.jsC.variable;
+    globalThis.v2 = globalThis.jsC.method('x');
+    globalThis.v3 = globalThis.jsC.getter;
+    globalThis.jsC.setter = false;
+  ''');
+  Expect.equals(42, (globalContext["v1"] as JSNumber).toDartInt);
+  Expect.equals(
+    "Overridden method(x);",
+    (globalContext["v2"] as JSString).toDart,
+  );
+  Expect.equals("Overridden getter", (globalContext["v3"] as JSString).toDart);
+  Expect.equals("Overridden setter(false);", log);
+}

LibTest/js_interop/JSExport/jsExport_A05_t02.dart

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+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion If members are overridden, only the overriding member will be
+/// wrapped as long as it or its class has this annotation.
+///
+/// @description Checks that if members are overridden, only the overriding
+/// members are wrapped. Test a mixin.
+/// @author sgrekhov22@gmail.com
+
+import 'dart:js_interop';
+import 'dart:js_interop_unsafe';
+import '../../../Utils/expect.dart';
+import '../js_utils.dart';
+
+String log = "";
+
+@JSExport()
+mixin M {
+  int variable = 0;
+  String method(String v) => "method($v);";
+  String get getter => "getter";
+  void set setter(bool value) {
+    log = "setter($value);";
+  }
+}
+
+@JSExport()
+class C with M {
+  @override
+  int variable = 42;
+
+  @override
+  String method(String v) => "Overridden method($v);";
+
+  @override
+  String get getter => "Overridden getter";
+
+  @override
+  void set setter(bool value) {
+    log = "Overridden setter($value);";
+  }
+}
+
+void main() {
+  doTest(createJSInteropWrapper<C>(C()));
+  doTest(createJSInteropWrapper<M>(C()));
+}
+
+void doTest(JSObject jsC) {
+  globalContext["jsC"] = jsC;
+  eval(r'''
+    globalThis.v1 = globalThis.jsC.variable;
+    globalThis.v2 = globalThis.jsC.method('x');
+    globalThis.v3 = globalThis.jsC.getter;
+    globalThis.jsC.setter = false;
+  ''');
+  Expect.equals(42, (globalContext["v1"] as JSNumber).toDartInt);
+  Expect.equals(
+    "Overridden method(x);",
+    (globalContext["v2"] as JSString).toDart,
+  );
+  Expect.equals("Overridden getter", (globalContext["v3"] as JSString).toDart);
+  Expect.equals("Overridden setter(false);", log);
+}

LibTest/js_interop/JSExport/jsExport_A05_t03.dart

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+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion If members are overridden, only the overriding member will be
+/// wrapped as long as it or its class has this annotation.
+///
+/// @description Checks that if members are overridden, but overriding  members
+/// are not annotated with `JSExport()` then the original members are not
+/// wrapped.
+/// @author sgrekhov22@gmail.com
+
+import 'dart:js_interop';
+import 'dart:js_interop_unsafe';
+import '../../../Utils/expect.dart';
+import '../js_utils.dart';
+
+String log = "";
+
+@JSExport()
+class A {
+  int variable = 0;
+  String method(String v) => "method($v);";
+  String get getter => "getter";
+  void set setter(bool value) {
+    log = "setter($value);";
+  }
+}
+
+class C extends A {
+  @override
+  int variable = 42;
+
+  @override
+  String method(String v) => "Overridden method($v);";
+
+  @override
+  String get getter => "Overridden getter";
+
+  @override
+  void set setter(bool value) {
+    log = "Overridden setter($value);";
+  }
+
+  @JSExport()
+  String s = "Dummy member to allow C to be passed to createJSInteropWrapper";
+}
+
+void main() {
+  var jsC = createJSInteropWrapper<C>(C());
+  globalContext["jsC"] = jsC;
+  eval(r'''
+    globalThis.v1 = globalThis.jsC.variable;
+    globalThis.v2 = globalThis.jsC.method;
+    globalThis.v3 = globalThis.jsC.getter;
+    globalThis.jsC.setter = false;
+  ''');
+  Expect.isNull(globalContext["v1"]);
+  Expect.isNull(globalContext["v2"]);
+  Expect.isNull(globalContext["v3"]);
+  Expect.equals("", log);
+
+  var jsA = createJSInteropWrapper<A>(C());
+  globalContext["jsA"] = jsA;
+  eval(r'''
+    globalThis.v4 = globalThis.jsA.variable;
+    globalThis.v5 = globalThis.jsA.method('x');
+    globalThis.v6 = globalThis.jsA.getter;
+    globalThis.jsA.setter = false;
+  ''');
+  Expect.equals(42, (globalContext["v4"] as JSNumber).toDartInt);
+  Expect.equals(
+    "Overridden method(x);",
+    (globalContext["v5"] as JSString).toDart,
+  );
+  Expect.equals("Overridden getter", (globalContext["v6"] as JSString).toDart);
+  Expect.equals("Overridden setter(false);", log);
+}

LibTest/js_interop/JSExport/jsExport_A05_t04.dart

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+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion If members are overridden, only the overriding member will be
+/// wrapped as long as it or its class has this annotation.
+///
+/// @description Checks that if members are overridden, but overriding  members
+/// are not annotated with `JSExport()` then the original members are not
+/// wrapped. Test a mixin.
+/// @author sgrekhov22@gmail.com
+
+import 'dart:js_interop';
+import 'dart:js_interop_unsafe';
+import '../../../Utils/expect.dart';
+import '../js_utils.dart';
+
+String log = "";
+
+@JSExport()
+mixin M {
+  int variable = 0;
+  String method(String v) => "method($v);";
+  String get getter => "getter";
+  void set setter(bool value) {
+    log = "setter($value);";
+  }
+}
+
+class C with M {
+  @override
+  int variable = 42;
+
+  @override
+  String method(String v) => "Overridden method($v);";
+
+  @override
+  String get getter => "Overridden getter";
+
+  @override
+  void set setter(bool value) {
+    log = "Overridden setter($value);";
+  }
+
+  @JSExport()
+  String s = "Dummy member to allow C to be passed to createJSInteropWrapper";
+}
+
+void main() {
+  var jsC = createJSInteropWrapper<C>(C());
+  globalContext["jsC"] = jsC;
+  eval(r'''
+    globalThis.v1 = globalThis.jsC.variable;
+    globalThis.v2 = globalThis.jsC.method;
+    globalThis.v3 = globalThis.jsC.getter;
+    globalThis.jsC.setter = false;
+  ''');
+  Expect.isNull(globalContext["v1"]);
+  Expect.isNull(globalContext["v2"]);
+  Expect.isNull(globalContext["v3"]);
+  Expect.equals("", log);
+
+  var jsM = createJSInteropWrapper<M>(C());
+  globalContext["jsM"] = jsM;
+  eval(r'''
+    globalThis.v4 = globalThis.jsM.variable;
+    globalThis.v5 = globalThis.jsM.method('x');
+    globalThis.v6 = globalThis.jsM.getter;
+    globalThis.jsM.setter = false;
+  ''');
+  Expect.equals(42, (globalContext["v4"] as JSNumber).toDartInt);
+  Expect.equals(
+    "Overridden method(x);",
+    (globalContext["v5"] as JSString).toDart,
+  );
+  Expect.equals("Overridden getter", (globalContext["v6"] as JSString).toDart);
+  Expect.equals("Overridden setter(false);", log);
+}