Migrate language_2/accessor_conflict to NNBD.

Change-Id: I136befc5fa77bfa2a118f9bd032250abcde2da68
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134222
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Erik Ernst <eernst@google.com>
Reviewed-by: Erik Ernst <eernst@google.com>

tests/language/accessor_conflict/export2_helper.dart

@@ -0,0 +1,6 @@
+// Copyright (c) 2016, 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.
+
+export "setter.dart";
+export "getter.dart";

tests/language/accessor_conflict/export2_test.dart

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+// Copyright (c) 2016, 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.
+
+// Verify that a getter and its corresponding setter can be imported from two
+// different files via a common export.  In this test the setter is imported
+// first.
+
+import "package:expect/expect.dart";
+
+import "export2_helper.dart";
+
+main() {
+  getValue = 123;
+  Expect.equals(x, 123);
+  x = 456;
+  Expect.equals(setValue, 456);
+}

tests/language/accessor_conflict/export_helper.dart

@@ -0,0 +1,6 @@
+// Copyright (c) 2016, 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.
+
+export "getter.dart";
+export "setter.dart";

tests/language/accessor_conflict/export_test.dart

@@ -0,0 +1,18 @@
+// Copyright (c) 2016, 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.
+
+// Verify that a getter and its corresponding setter can be imported from two
+// different files via a common export.  In this test the getter is imported
+// first.
+
+import "package:expect/expect.dart";
+
+import "export_helper.dart";
+
+main() {
+  getValue = 123;
+  Expect.equals(x, 123);
+  x = 456;
+  Expect.equals(setValue, 456);
+}

tests/language/accessor_conflict/getter.dart

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+// Copyright (c) 2016, 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.
+
+var getValue;
+
+get x => getValue;

tests/language/accessor_conflict/import2_test.dart

@@ -0,0 +1,18 @@
+// Copyright (c) 2016, 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.
+
+// Verify that a getter and its corresponding setter can be imported from two
+// different files.  In this test the setter is imported first.
+
+import "package:expect/expect.dart";
+
+import "setter.dart";
+import "getter.dart";
+
+main() {
+  getValue = 123;
+  Expect.equals(x, 123);
+  x = 456;
+  Expect.equals(setValue, 456);
+}

tests/language/accessor_conflict/import_prefixed2_test.dart

@@ -0,0 +1,18 @@
+// Copyright (c) 2016, 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.
+
+// Verify that a getter and its corresponding setter can be imported from two
+// different files.  In this test the setter is imported first.
+
+import "package:expect/expect.dart";
+
+import "setter.dart" as p;
+import "getter.dart" as p;
+
+main() {
+  p.getValue = 123;
+  Expect.equals(p.x, 123);
+  p.x = 456;
+  Expect.equals(p.setValue, 456);
+}

tests/language/accessor_conflict/import_prefixed_test.dart

@@ -0,0 +1,18 @@
+// Copyright (c) 2016, 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.
+
+// Verify that a getter and its corresponding setter can be imported from two
+// different files.  In this test the getter is imported first.
+
+import "package:expect/expect.dart";
+
+import "getter.dart" as p;
+import "setter.dart" as p;
+
+main() {
+  p.getValue = 123;
+  Expect.equals(p.x, 123);
+  p.x = 456;
+  Expect.equals(p.setValue, 456);
+}

tests/language/accessor_conflict/import_test.dart

@@ -0,0 +1,18 @@
+// Copyright (c) 2016, 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.
+
+// Verify that a getter and its corresponding setter can be imported from two
+// different files.  In this test the getter is imported first.
+
+import "package:expect/expect.dart";
+
+import "getter.dart";
+import "setter.dart";
+
+main() {
+  getValue = 123;
+  Expect.equals(x, 123);
+  x = 456;
+  Expect.equals(setValue, 456);
+}

tests/language/accessor_conflict/setter.dart

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+// Copyright (c) 2016, 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.
+
+var setValue;
+
+set x(value) {
+  setValue = value;
+}