Move file_system libraries into 'analyzer'.

pkg/analyzer/test/file_system/resource_uri_resolver_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.
+
+library test.resource_uri_resolver;
+
+import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:unittest/unittest.dart';
+
+
+main() {
+  groupSep = ' | ';
+  group('ResourceUriResolver', () {
+    MemoryResourceProvider provider;
+    ResourceUriResolver resolver;
+
+    setUp(() {
+      provider = new MemoryResourceProvider();
+      resolver = new ResourceUriResolver(provider);
+      provider.newFile('/test.dart', '');
+      provider.newFolder('/folder');
+    });
+
+    group('fromEncoding', () {
+      test('file', () {
+        var uri = new Uri(path: '/test.dart');
+        Source source = resolver.fromEncoding(UriKind.FILE_URI, uri);
+        expect(source, isNotNull);
+        expect(source.exists(), isTrue);
+        expect(source.fullName, '/test.dart');
+      });
+
+      test('not a UriKind.FILE_URI', () {
+        var uri = new Uri(path: '/test.dart');
+        Source source = resolver.fromEncoding(UriKind.DART_URI, uri);
+        expect(source, isNull);
+      });
+    });
+
+    group('resolveAbsolute', () {
+      test('file', () {
+        var uri = new Uri(scheme: 'file', path: '/test.dart');
+        Source source = resolver.resolveAbsolute(uri);
+        expect(source, isNotNull);
+        expect(source.exists(), isTrue);
+        expect(source.fullName, '/test.dart');
+      });
+
+      test('folder', () {
+        var uri = new Uri(scheme: 'file', path: '/folder');
+        Source source = resolver.resolveAbsolute(uri);
+        expect(source, isNull);
+      });
+
+      test('not a file URI', () {
+        var uri = new Uri(scheme: 'https', path: '127.0.0.1/test.dart');
+        Source source = resolver.resolveAbsolute(uri);
+        expect(source, isNull);
+      });
+    });
+  });
+}