Added support for GN workspaces.

pkg/analyzer/test/generated/gn_test.dart

+// Copyright (c) 2017, 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.gn_test;
+
+import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/src/generated/gn.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(GnPackageUriResolverTest);
+    defineReflectiveTests(GnWorkspaceTest);
+  });
+}
+
+@reflectiveTest
+class GnPackageUriResolverTest extends _BaseTest {
+  GnWorkspace workspace;
+  GnPackageUriResolver resolver;
+
+  void test_resolve() {
+    _addResources([
+      '/workspace/.jiri_root/',
+      '/workspace/out/debug-x87_128/gen/dart.sources/',
+      '/workspace/some/code/',
+      '/workspace/a/source/code.dart',
+    ]);
+    provider.newFile(
+        _p('/workspace/out/debug-x87_128/gen/dart.sources/flutter'),
+        '/workspace/a/source');
+    _setUp();
+    _assertResolve(
+        'package:flutter/code.dart', '/workspace/a/source/code.dart');
+  }
+
+  void test_resolveDoesNotExist() {
+    _addResources([
+      '/workspace/.jiri_root/',
+      '/workspace/out/debug-x87_128/gen/dart.sources/',
+      '/workspace/some/code/',
+      '/workspace/a/source/code.dart',
+    ]);
+    provider.newFile(
+        _p('/workspace/out/debug-x87_128/gen/dart.sources/flutter'),
+        '/workspace/a/source');
+    _setUp();
+    expect(
+        resolver.resolveAbsolute(Uri.parse('package:bogus/code.dart')), null);
+  }
+
+  void _addResources(List<String> paths) {
+    for (String path in paths) {
+      if (path.endsWith('/')) {
+        provider.newFolder(_p(path.substring(0, path.length - 1)));
+      } else {
+        provider.newFile(_p(path), '');
+      }
+    }
+  }
+
+  void _setUp() {
+    workspace = GnWorkspace.find(provider, _p('/workspace'));
+    resolver = new GnPackageUriResolver(workspace);
+  }
+
+  void _assertResolve(String uriStr, String posixPath,
+      {bool exists: true, bool restore: true}) {
+    Uri uri = Uri.parse(uriStr);
+    Source source = resolver.resolveAbsolute(uri);
+    expect(source, isNotNull);
+    expect(source.fullName, _p(posixPath));
+    expect(source.uri, uri);
+    expect(source.exists(), exists);
+    // If enabled, test also "restoreAbsolute".
+    if (restore) {
+      Uri uri = resolver.restoreAbsolute(source);
+      expect(uri.toString(), uriStr);
+    }
+  }
+}
+
+@reflectiveTest
+class GnWorkspaceTest extends _BaseTest {
+  void test_find_notAbsolute() {
+    expect(() => GnWorkspace.find(provider, _p('not_absolute')),
+        throwsArgumentError);
+  }
+
+  void test_find_noJiriRoot() {
+    provider.newFolder(_p('/workspace'));
+    GnWorkspace workspace = GnWorkspace.find(provider, _p('/workspace'));
+    expect(workspace, isNull);
+  }
+
+  void test_find_withRoot() {
+    provider.newFolder(_p('/workspace/.jiri_root'));
+    provider.newFolder(_p('/workspace/out/debug-x87_128/gen/dart.sources'));
+    provider.newFolder(_p('/workspace/some/code'));
+    GnWorkspace workspace =
+        GnWorkspace.find(provider, _p('/workspace/some/code'));
+    expect(workspace, isNotNull);
+    expect(workspace.root, _p('/workspace'));
+  }
+
+  void test_packages() {
+    provider.newFolder(_p('/workspace/.jiri_root'));
+    provider.newFolder(_p('/workspace/out/debug-x87_128/gen/dart.sources'));
+    provider.newFile(
+        _p('/workspace/out/debug-x87_128/gen/dart.sources/flutter'),
+        '/path/to/source');
+    provider.newFolder(_p('/workspace/some/code'));
+    GnWorkspace workspace =
+        GnWorkspace.find(provider, _p('/workspace/some/code'));
+    expect(workspace, isNotNull);
+    expect(workspace.root, _p('/workspace'));
+    expect(workspace.packages.length, 1);
+    expect(workspace.packages['flutter'], '/path/to/source');
+  }
+}
+
+class _BaseTest {
+  final MemoryResourceProvider provider = new MemoryResourceProvider();
+
+  /**
+   * Return the [provider] specific path for the given Posix [path].
+   */
+  String _p(String path) => provider.convertPath(path);
+}