Migrate language_2/interceptor to NNBD.

Change-Id: Ibbc89b68ef980e1ff9913c299c05d5117b249477
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/148949
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Erik Ernst <eernst@google.com>
Reviewed-by: Erik Ernst <eernst@google.com>

tests/language/interceptor/interceptor2_test.dart

@@ -0,0 +1,25 @@
+// Copyright (c) 2012, 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.
+
+import "package:expect/expect.dart";
+
+// Regression test for issue http://dartbug.com/6903: dart2js used to
+// not generate an interceptor forwarder when a getter call and a
+// method call on an intercepted method were both used.
+
+class A {
+  get iterator => () => 499;
+}
+
+main() {
+  var a = <dynamic>[
+    new A(),
+    [1, 1]
+  ];
+  Expect.equals(499, a[0].iterator());
+  Expect.equals(499, (a[0].iterator)());
+  for (var i in a[1]) {
+    Expect.equals(1, i);
+  }
+}

tests/language/interceptor/interceptor3_test.dart

@@ -0,0 +1,17 @@
+// Copyright (c) 2012, 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.
+
+import "package:expect/expect.dart";
+
+// Test that code motion in the presence of interceptors work in dart2js.
+
+main() {
+  var a = <dynamic>[2, '2'];
+  var b = a[1];
+  if (a[0] == 2 && b is String) {
+    Expect.isTrue(b.contains('2'));
+  } else {
+    b.isEven();
+  }
+}

tests/language/interceptor/interceptor4_test.dart

@@ -0,0 +1,14 @@
+// Copyright (c) 2012, 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.
+
+import "package:expect/expect.dart";
+
+// Test that dart2js gets the right interceptor for an int.
+
+main() {
+  var a = [1];
+  var b = a[0];
+  Expect.equals('1', b.toString());
+  Expect.isTrue(b.isOdd);
+}

tests/language/interceptor/interceptor5_test.dart

@@ -0,0 +1,11 @@
+// Copyright (c) 2012, 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.
+
+import "package:expect/expect.dart";
+
+get X => [() => 123];
+
+main() {
+  Expect.equals(123, X.last());
+}

tests/language/interceptor/interceptor7_test.dart

@@ -0,0 +1,16 @@
+// Copyright (c) 2013, 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.
+
+// Test that dart2js uses the right interceptor when call a method on
+// something that has type number.
+
+import 'package:expect/expect.dart';
+
+var array = <dynamic>[];
+
+main() {
+  array.add(false);
+  dynamic x = array[0] ? 1.5 : 2;
+  Expect.isTrue(x.isEven);
+}

tests/language/interceptor/interceptor8_test.dart

@@ -0,0 +1,12 @@
+// Copyright (c) 2013, 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.
+
+// Regression test for dart2js whose codegen used to not consider a double
+// could be instantiated when doing int / int.
+
+var a = [5, 2];
+
+main() {
+  print(a[0] / a[1]);
+}

tests/language/interceptor/interceptor9_test.dart

@@ -0,0 +1,32 @@
+// Copyright (c) 2014, 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.
+
+// Regression test for dart2js whose codegen in some cases did not take is
+// tests into account when computing the set of classes for interceptors.
+// See http://dartbug.com/17325
+
+import "package:expect/expect.dart";
+import "dart:typed_data";
+
+confuse(x, [y = null]) => new DateTime.now().day == 42 ? y : x;
+
+boom() {
+  var x = confuse(new Uint8List(22), "");
+  Expect.isTrue(x is Uint8List);
+  x.startsWith("a");
+  x.endsWith("u");
+}
+
+main() {
+  try {
+    var f;
+    if (confuse(true)) {
+      // prevent inlining
+      f = boom;
+    }
+    f();
+  } catch (e) {
+    if (e is ExpectException) throw e;
+  }
+}

tests/language/interceptor/interceptor_test.dart

@@ -0,0 +1,35 @@
+// Copyright (c) 2012, 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.
+
+import "package:expect/expect.dart";
+
+// Test that interceptors (that is, methods in classes implemented as
+// JavaScript primitives) in dart2js work.
+
+class A {
+  codeUnitAt(a) => a;
+}
+
+main() {
+  var res = <dynamic>[[], 1, 'foo', new A()];
+  Expect.throws(() => res[0].codeUnitAt(1));
+  Expect.throws(() => (res[0].codeUnitAt)(1));
+
+  Expect.throws(() => res[1].codeUnitAt(1));
+  Expect.throws(() => (res[1].codeUnitAt)(1));
+
+  Expect.equals(111, res[2].codeUnitAt(1));
+  Expect.equals(111, (res[2].codeUnitAt)(1));
+  Expect.throws(() => res[2].codeUnitAt(1, 4));
+  Expect.throws(() => res[2].codeUnitAt());
+  Expect.throws(() => (res[2].codeUnitAt)(1, 4));
+  Expect.throws(() => (res[2].codeUnitAt)());
+
+  Expect.equals(1, res[3].codeUnitAt(1));
+  Expect.equals(1, (res[3].codeUnitAt)(1));
+  Expect.throws(() => res[3].codeUnitAt(1, 4));
+  Expect.throws(() => res[3].codeUnitAt());
+  Expect.throws(() => (res[3].codeUnitAt)(1, 4));
+  Expect.throws(() => (res[3].codeUnitAt)());
+}