Prototype for package-specific cache partitions

pkg/analyzer/test/generated/package_test.dart

+// 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.
+
+library analyzer.test.generated.package_test;
+
+import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/package.dart';
+import 'package:analyzer/src/generated/sdk.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:package_config/packages.dart';
+import 'package:unittest/unittest.dart';
+
+import '../reflective_tests.dart';
+import '../src/context/mock_sdk.dart';
+import '../utils.dart';
+import 'resolver_test_case.dart';
+
+main() {
+  initializeTestEnvironment();
+  runReflectiveTests(DependencyFinderTest);
+  runReflectiveTests(PackageDescriptionTest);
+  runReflectiveTests(PackageManagerTest);
+}
+
+/**
+ * The name of the pubspec.yaml file.
+ */
+const String pubspecName = 'pubspec.yaml';
+
+@reflectiveTest
+class DependencyFinderTest extends ResolverTestCase {
+  /**
+   * The resource provider to be used by tests.
+   */
+  MemoryResourceProvider resourceProvider;
+
+  @override
+  void setUp() {
+    resourceProvider = new MemoryResourceProvider();
+  }
+
+  void test_transitiveDependenciesFor_circularDependencies() {
+    String packageA = '/pub-cache/a-1.0';
+    String packageB = '/pub-cache/b-1.0';
+    String packageC = '/pub-cache/c-1.0';
+    resourceProvider.newFile(
+        '$packageA/$pubspecName',
+        '''
+    dependencies:
+      b: any
+    ''');
+    resourceProvider.newFile(
+        '$packageB/$pubspecName',
+        '''
+    dependencies:
+      c: any
+    ''');
+    resourceProvider.newFile(
+        '$packageC/$pubspecName',
+        '''
+    dependencies:
+      a: any
+    ''');
+    Map<String, List<Folder>> packageMap = <String, List<Folder>>{
+      'a': <Folder>[resourceProvider.getFolder(packageA)],
+      'b': <Folder>[resourceProvider.getFolder(packageB)],
+      'c': <Folder>[resourceProvider.getFolder(packageC)],
+    };
+
+    DependencyFinder finder = new DependencyFinder(resourceProvider);
+    List<String> result =
+        finder.transitiveDependenciesFor(packageMap, packageA);
+    expect(result, unorderedEquals([packageB, packageC]));
+  }
+
+  void test_transitiveDependenciesFor_missingPubspec() {
+    String packagePath = '/pub-cache/a-1.0';
+    Map<String, List<Folder>> packageMap = <String, List<Folder>>{
+      'a': <Folder>[resourceProvider.getFolder(packagePath)]
+    };
+
+    DependencyFinder finder = new DependencyFinder(resourceProvider);
+    expect(() => finder.transitiveDependenciesFor(packageMap, packagePath),
+        throws);
+  }
+
+  void test_transitiveDependenciesFor_noDependencies() {
+    String packagePath = '/pub-cache/a-1.0';
+    resourceProvider.newFile('$packagePath/$pubspecName', '');
+    Map<String, List<Folder>> packageMap = <String, List<Folder>>{
+      'a': <Folder>[resourceProvider.getFolder(packagePath)]
+    };
+
+    DependencyFinder finder = new DependencyFinder(resourceProvider);
+    List<String> result =
+        finder.transitiveDependenciesFor(packageMap, packagePath);
+    expect(result, hasLength(0));
+  }
+
+  void test_transitiveDependenciesFor_overlappingDependencies() {
+    String packageA = '/pub-cache/a-1.0';
+    String packageB = '/pub-cache/b-1.0';
+    String packageC = '/pub-cache/c-1.0';
+    String packageD = '/pub-cache/d-1.0';
+    resourceProvider.newFile(
+        '$packageA/$pubspecName',
+        '''
+    dependencies:
+      b: any
+      c: any
+    ''');
+    resourceProvider.newFile(
+        '$packageB/$pubspecName',
+        '''
+    dependencies:
+      d: any
+    ''');
+    resourceProvider.newFile(
+        '$packageC/$pubspecName',
+        '''
+    dependencies:
+      d: any
+    ''');
+    resourceProvider.newFile('$packageD/$pubspecName', '');
+    Map<String, List<Folder>> packageMap = <String, List<Folder>>{
+      'a': <Folder>[resourceProvider.getFolder(packageA)],
+      'b': <Folder>[resourceProvider.getFolder(packageB)],
+      'c': <Folder>[resourceProvider.getFolder(packageC)],
+      'd': <Folder>[resourceProvider.getFolder(packageD)],
+    };
+
+    DependencyFinder finder = new DependencyFinder(resourceProvider);
+    List<String> result =
+        finder.transitiveDependenciesFor(packageMap, packageA);
+    expect(result, unorderedEquals([packageB, packageC, packageD]));
+  }
+
+  void test_transitiveDependenciesFor_simpleDependencies() {
+    String packageA = '/pub-cache/a-1.0';
+    String packageB = '/pub-cache/b-1.0';
+    String packageC = '/pub-cache/c-1.0';
+    resourceProvider.newFile(
+        '$packageA/$pubspecName',
+        '''
+    dependencies:
+      b: any
+      c: any
+    ''');
+    resourceProvider.newFile('$packageB/$pubspecName', '');
+    resourceProvider.newFile('$packageC/$pubspecName', '');
+    Map<String, List<Folder>> packageMap = <String, List<Folder>>{
+      'a': <Folder>[resourceProvider.getFolder(packageA)],
+      'b': <Folder>[resourceProvider.getFolder(packageB)],
+      'c': <Folder>[resourceProvider.getFolder(packageC)],
+    };
+
+    DependencyFinder finder = new DependencyFinder(resourceProvider);
+    List<String> result =
+        finder.transitiveDependenciesFor(packageMap, packageA);
+    expect(result, unorderedEquals([packageB, packageC]));
+  }
+}
+
+@reflectiveTest
+class PackageDescriptionTest extends ResolverTestCase {
+  void test_equal_false_differentOptions() {
+    String packageId = 'path1;path2';
+    DartSdk sdk = new MockSdk();
+    AnalysisOptionsImpl options1 = new AnalysisOptionsImpl();
+    AnalysisOptionsImpl options2 = new AnalysisOptionsImpl();
+    options2.enableAsync = !options1.enableAsync;
+    PackageDescription first = new PackageDescription(packageId, sdk, options1);
+    PackageDescription second =
+        new PackageDescription(packageId, sdk, options2);
+    expect(first == second, isFalse);
+  }
+
+  void test_equal_false_differentPaths() {
+    String packageId1 = 'path1;path2';
+    String packageId2 = 'path1;path3';
+    DartSdk sdk = new MockSdk();
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    PackageDescription first = new PackageDescription(packageId1, sdk, options);
+    PackageDescription second =
+        new PackageDescription(packageId2, sdk, options);
+    expect(first == second, isFalse);
+  }
+
+  void test_equal_false_differentSdks() {
+    String packageId = 'path1;path2';
+    DartSdk sdk1 = new MockSdk();
+    DartSdk sdk2 = new MockSdk();
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    PackageDescription first = new PackageDescription(packageId, sdk1, options);
+    PackageDescription second =
+        new PackageDescription(packageId, sdk2, options);
+    expect(first == second, isFalse);
+  }
+
+  void test_equal_true() {
+    String packageId = 'path1;path2';
+    DartSdk sdk = new MockSdk();
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    PackageDescription first = new PackageDescription(packageId, sdk, options);
+    PackageDescription second = new PackageDescription(packageId, sdk, options);
+    expect(first == second, isTrue);
+  }
+}
+
+@reflectiveTest
+class PackageManagerTest extends ResolverTestCase {
+  /**
+   * The resource provider to be used by tests.
+   */
+  MemoryResourceProvider resourceProvider;
+
+  @override
+  void setUp() {
+    resourceProvider = new MemoryResourceProvider();
+  }
+
+  void test_getContext() {
+    String packageA = '/pub-cache/a-1.0';
+    String packageB1 = '/pub-cache/b-1.0';
+    String packageB2 = '/pub-cache/b-2.0';
+    String packageC = '/pub-cache/c-1.0';
+    resourceProvider.newFile(
+        '$packageA/$pubspecName',
+        '''
+    dependencies:
+      b: any
+      c: any
+    ''');
+    resourceProvider.newFile('$packageB1/$pubspecName', '');
+    resourceProvider.newFile('$packageB2/$pubspecName', '');
+    resourceProvider.newFile('$packageC/$pubspecName', '');
+
+    Packages packages1 = new _MockPackages(<String, Uri>{
+      'a': new Uri.file(packageA),
+      'b': new Uri.file(packageB1),
+      'c': new Uri.file(packageC),
+    });
+    DartUriResolver resolver = new DartUriResolver(new MockSdk());
+    AnalysisOptions options = new AnalysisOptionsImpl();
+    //
+    // Verify that we can compute a context for a package.
+    //
+    PackageManager manager = new PackageManager(resourceProvider);
+    AnalysisContext context1 =
+        manager.getContext(packageA, packages1, resolver, options);
+    expect(context1, isNotNull);
+    //
+    // Verify that if we have the same package map we get the same context.
+    //
+    AnalysisContext context2 =
+        manager.getContext(packageA, packages1, resolver, options);
+    expect(context2, same(context1));
+    //
+    // Verify that if we have a different package map we get a different context.
+    //
+    Packages packages3 = new _MockPackages(<String, Uri>{
+      'a': new Uri.file(packageA),
+      'b': new Uri.file(packageB2),
+      'c': new Uri.file(packageC),
+    });
+    AnalysisContext context3 =
+        manager.getContext(packageA, packages3, resolver, options);
+    expect(context3, isNot(same(context1)));
+  }
+}
+
+/**
+ * An implementation of [Packages] used for testing.
+ */
+class _MockPackages implements Packages {
+  final Map<String, Uri> map;
+
+  _MockPackages(this.map);
+
+  @override
+  Iterable<String> get packages => map.keys;
+
+  @override
+  Map<String, Uri> asMap() => map;
+
+  @override
+  Uri resolve(Uri packageUri, {Uri notFound(Uri packageUri)}) {
+    fail('Unexpected invocation of resolve');
+    return null;
+  }
+}