Emit warning on import of dart:mirrors.

tests/compiler/dart2js/import_mirrors_test.dart

+// 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.
+
+// Test that the compiler emits a warning on import of 'dart:mirrors' unless
+// the flag --enable-experimental-mirrors is used.
+
+library dart2js.test.import;
+
+import 'package:expect/expect.dart';
+import 'package:async_helper/async_helper.dart';
+import 'package:compiler/src/dart2jslib.dart' show MessageKind;
+import 'memory_compiler.dart';
+
+const DIRECT_IMPORT = const {
+  '/main.dart': '''
+import 'dart:mirrors';
+
+main() {}
+''',
+
+  'paths':
+      "main.dart => dart:mirrors",
+};
+
+const INDIRECT_IMPORT1 = const {
+  '/main.dart': '''
+import 'first.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths':
+      "first.dart => dart:mirrors",
+  'verbosePaths':
+      "main.dart => first.dart => dart:mirrors",
+};
+
+const INDIRECT_IMPORT2 = const {
+  '/main.dart': '''
+import 'first.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'second.dart';
+''',
+  '/second.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths':
+      "second.dart => dart:mirrors",
+  'verbosePaths':
+      "main.dart => first.dart => second.dart => dart:mirrors",
+};
+
+const INDIRECT_PACKAGE_IMPORT1 = const {
+  '/main.dart': '''
+import 'first.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'package:second.dart';
+''',
+  '/pkg/second.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths':
+      "first.dart => package:second.dart => dart:mirrors",
+  'verbosePaths':
+      "main.dart => first.dart => package:second.dart => dart:mirrors",
+};
+
+const INDIRECT_PACKAGE_IMPORT2 = const {
+  '/main.dart': '''
+import 'first.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'package:package-name/second.dart';
+''',
+  '/pkg/package-name/second.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths':
+      "first.dart => package:package-name => dart:mirrors",
+  'verbosePaths':
+      "main.dart => first.dart => package:package-name/second.dart "
+      "=> dart:mirrors",
+};
+
+const INDIRECT_PACKAGE_IMPORT3 = const {
+  '/main.dart': '''
+import 'first.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'package:package1/second.dart';
+''',
+  '/pkg/package1/second.dart': '''
+import 'package:package2/third.dart';
+''',
+  '/pkg/package2/third.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths':
+      "first.dart => package:package1 => package:package2 => dart:mirrors",
+  'verbosePaths':
+      "main.dart => first.dart => package:package1/second.dart "
+      "=> package:package2/third.dart => dart:mirrors",
+};
+
+const INDIRECT_PACKAGE_IMPORT4 = const {
+  '/main.dart': '''
+import 'first.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'package:package1/second.dart';
+''',
+  '/pkg/package1/second.dart': '''
+import 'sub/third.dart';
+''',
+  '/pkg/package1/sub/third.dart': '''
+import 'package:package2/fourth.dart';
+''',
+  '/pkg/package2/fourth.dart': '''
+import 'lib/src/fifth.dart';
+''',
+  '/pkg/package2/lib/src/fifth.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths':
+      "first.dart => package:package1 => package:package2 => dart:mirrors",
+  'verbosePaths':
+      "main.dart => first.dart => package:package1/second.dart "
+      "=> package:package1/sub/third.dart => package:package2/fourth.dart "
+      "=> package:package2/lib/src/fifth.dart => dart:mirrors",
+};
+
+const DUAL_DIRECT_IMPORT = const {
+  '/main.dart': '''
+import 'dart:mirrors';
+import 'dart:mirrors';
+
+main() {}
+''',
+
+  'paths':
+      "main.dart => dart:mirrors",
+};
+
+const DUAL_INDIRECT_IMPORT1 = const {
+  '/main.dart': '''
+import 'dart:mirrors';
+import 'first.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths': const
+      ["main.dart => dart:mirrors",
+       "first.dart => dart:mirrors"],
+  'verbosePaths': const
+      ["main.dart => dart:mirrors",
+       "main.dart => first.dart => dart:mirrors"],
+};
+
+const DUAL_INDIRECT_IMPORT2 = const {
+  '/main.dart': '''
+import 'first.dart';
+import 'second.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'dart:mirrors';
+''',
+  '/second.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths': const
+      ["first.dart => dart:mirrors",
+       "second.dart => dart:mirrors"],
+  'verbosePaths': const
+      ["main.dart => first.dart => dart:mirrors",
+       "main.dart => second.dart => dart:mirrors"],
+};
+
+const DUAL_INDIRECT_IMPORT3 = const {
+  '/main.dart': '''
+import 'first.dart';
+import 'second.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'third.dart';
+''',
+  '/second.dart': '''
+import 'third.dart';
+''',
+  '/third.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths':
+      "third.dart => dart:mirrors",
+  'verbosePaths': const
+      ["main.dart => first.dart => third.dart => dart:mirrors",
+       "main.dart => second.dart => third.dart => dart:mirrors"],
+};
+
+const DUAL_INDIRECT_PACKAGE_IMPORT1 = const {
+  '/main.dart': '''
+import 'package:package1/second.dart';
+import 'first.dart';
+
+main() {}
+''',
+  '/first.dart': '''
+import 'package:package2/third.dart';
+''',
+  '/pkg/package1/second.dart': '''
+import 'dart:mirrors';
+''',
+  '/pkg/package2/third.dart': '''
+import 'dart:mirrors';
+''',
+
+  'paths': const
+      ["main.dart => package:package1 => dart:mirrors",
+       "first.dart => package:package2 => dart:mirrors"],
+  'verbosePaths': const
+      ["main.dart => package:package1/second.dart => dart:mirrors",
+       "main.dart => first.dart => package:package2/third.dart => dart:mirrors"]
+};
+
+
+test(Map sourceFiles,
+    {expectedPaths,
+     bool verbose: false,
+     bool enableExperimentalMirrors: false}) {
+  if (expectedPaths is! List) {
+    expectedPaths = [expectedPaths];
+  }
+  var collector = new DiagnosticCollector();
+  var options = [];
+  if (verbose) {
+    options.add('--verbose');
+  }
+  if (enableExperimentalMirrors) {
+    options.add('--enable-experimental-mirrors');
+  }
+  var compiler = compilerFor(sourceFiles, diagnosticHandler: collector,
+                             packageRoot: Uri.parse('memory:/pkg/'),
+                             options: options);
+  asyncTest(() => compiler.run(Uri.parse('memory:/main.dart')).then((_) {
+    Expect.equals(0, collector.errors.length, 'Errors: ${collector.errors}');
+    if (enableExperimentalMirrors) {
+      Expect.equals(0, collector.warnings.length,
+                    'Warnings: ${collector.errors}');
+    } else {
+      Expect.equals(1, collector.warnings.length,
+                    'Warnings: ${collector.errors}');
+      Expect.equals(
+          MessageKind.IMPORT_EXPERIMENTAL_MIRRORS.message(
+              {'importChain': expectedPaths.join(
+                  MessageKind.IMPORT_EXPERIMENTAL_MIRRORS_PADDING)}).toString(),
+          collector.warnings.first.message);
+    }
+  }));
+}
+
+checkPaths(Map sourceData) {
+  Map sourceFiles = sourceData;
+  var expectedPaths = sourceData['paths'];
+  var expectedVerbosePaths = sourceData['verbosePaths'];
+  if (expectedVerbosePaths == null) {
+    expectedVerbosePaths = expectedPaths;
+  }
+  test(sourceFiles, expectedPaths: expectedPaths);
+  test(sourceFiles, expectedPaths: expectedVerbosePaths, verbose: true);
+  test(sourceFiles, enableExperimentalMirrors: true);
+}
+
+void main() {
+  checkPaths(DIRECT_IMPORT);
+  checkPaths(INDIRECT_IMPORT1);
+  checkPaths(INDIRECT_IMPORT2);
+  checkPaths(INDIRECT_PACKAGE_IMPORT1);
+  checkPaths(INDIRECT_PACKAGE_IMPORT2);
+  checkPaths(INDIRECT_PACKAGE_IMPORT3);
+  checkPaths(INDIRECT_PACKAGE_IMPORT4);
+  checkPaths(DUAL_DIRECT_IMPORT);
+  checkPaths(DUAL_INDIRECT_IMPORT1);
+  checkPaths(DUAL_INDIRECT_IMPORT2);
+  checkPaths(DUAL_INDIRECT_IMPORT3);
+  checkPaths(DUAL_INDIRECT_PACKAGE_IMPORT1);
+}