Generalize DartSdkManager to support embedder SDKs

pkg/analyzer/test/generated/sdk_test.dart

Index: pkg/analyzer/test/generated/sdk_test.dart
diff --git a/pkg/analyzer/test/generated/sdk_test.dart b/pkg/analyzer/test/generated/sdk_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..8976b9cc4bd7483c51427d57a6ae73aec016716c
--- /dev/null
+++ b/pkg/analyzer/test/generated/sdk_test.dart
@@ -0,0 +1,132 @@
+// 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.
+
+library analyzer.test.generated.sdk_test;
+
+import 'package:analyzer/dart/ast/token.dart';
+import 'package:analyzer/src/dart/ast/token.dart';
+import 'package:analyzer/src/dart/scanner/reader.dart';
+import 'package:analyzer/src/dart/scanner/scanner.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/error.dart';
+import 'package:analyzer/src/generated/sdk.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:unittest/unittest.dart';
+
+import '../reflective_tests.dart';
+import '../src/context/mock_sdk.dart';
+import '../utils.dart';
+import 'test_support.dart';
+
+main() {
+  initializeTestEnvironment();
+  runReflectiveTests(DartSdkManagerTest);
+  runReflectiveTests(SdkDescriptionTest);
+}
+
+@reflectiveTest
+class DartSdkManagerTest extends EngineTestCase {
+  void test_anySdk() {
+    DartSdkManager manager =
+        new DartSdkManager('/a/b/c', false, _failIfCreated);
+    expect(manager.anySdk, isNull);
+
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    SdkDescription description = new SdkDescription(<String>['/c/d'], options);
+    DartSdk sdk = new MockSdk();
+    manager.getSdk(description, () => sdk);
+    expect(manager.anySdk, same(sdk));
+  }
+
+  void test_getSdk_differentDescriptors() {
+    DartSdkManager manager =
+        new DartSdkManager('/a/b/c', false, _failIfCreated);
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    SdkDescription description1 = new SdkDescription(<String>['/c/d'], options);
+    DartSdk sdk1 = new MockSdk();
+    DartSdk result1 = manager.getSdk(description1, () => sdk1);
+    expect(result1, same(sdk1));
+    SdkDescription description2 = new SdkDescription(<String>['/e/f'], options);
+    DartSdk sdk2 = new MockSdk();
+    DartSdk result2 = manager.getSdk(description2, () => sdk2);
+    expect(result2, same(sdk2));
+
+    manager.getSdk(description1, _failIfAbsent);
+    manager.getSdk(description2, _failIfAbsent);
+  }
+
+  void test_getSdk_sameDescriptor() {
+    DartSdkManager manager =
+        new DartSdkManager('/a/b/c', false, _failIfCreated);
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    SdkDescription description = new SdkDescription(<String>['/c/d'], options);
+    DartSdk sdk = new MockSdk();
+    DartSdk result = manager.getSdk(description, () => sdk);
+    expect(result, same(sdk));
+    manager.getSdk(description, _failIfAbsent);
+  }
+
+  DartSdk _failIfAbsent() {
+    fail('Use of ifAbsent function');
+    return null;
+  }
+
+  DartSdk _failIfCreated(_) {
+    fail('Use of sdkCreator');
+    return null;
+  }
+}
+
+@reflectiveTest
+class SdkDescriptionTest extends EngineTestCase {
+  void test_equals_differentPaths_nested() {
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    SdkDescription left = new SdkDescription(<String>['/a/b/c'], options);
+    SdkDescription right = new SdkDescription(<String>['/a/b'], options);
+    expect(left == right, isFalse);
+  }
+
+  void test_equals_differentPaths_unrelated() {
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    SdkDescription left = new SdkDescription(<String>['/a/b/c'], options);
+    SdkDescription right = new SdkDescription(<String>['/d/e'], options);
+    expect(left == right, isFalse);
+  }
+
+  void test_equals_noPaths() {
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    SdkDescription left = new SdkDescription(<String>[], options);
+    SdkDescription right = new SdkDescription(<String>[], options);
+    expect(left == right, isTrue);
+  }
+
+  void test_equals_samePaths_differentOptions() {
+    String path = '/a/b/c';
+    AnalysisOptionsImpl leftOptions = new AnalysisOptionsImpl();
+    AnalysisOptionsImpl rightOptions = new AnalysisOptionsImpl();
+    rightOptions.strongMode = !leftOptions.strongMode;
+    SdkDescription left = new SdkDescription(<String>[path], leftOptions);
+    SdkDescription right = new SdkDescription(<String>[path], rightOptions);
+    expect(left == right, isFalse);
+  }
+
+  void test_equals_samePaths_sameOptions_multiple() {
+    String leftPath = '/a/b/c';
+    String rightPath = '/d/e';
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    SdkDescription left =
+        new SdkDescription(<String>[leftPath, rightPath], options);
+    SdkDescription right =
+        new SdkDescription(<String>[leftPath, rightPath], options);
+    expect(left == right, isTrue);
+  }
+
+  void test_equals_samePaths_sameOptions_single() {
+    String path = '/a/b/c';
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    SdkDescription left = new SdkDescription(<String>[path], options);
+    SdkDescription right = new SdkDescription(<String>[path], options);
+    expect(left == right, isTrue);
+  }
+}