Add analysis_server_client without analysis_server

pkg/analysis_server_client/test/analysis_server_client_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.
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:analysis_server_client/analysis_server_client.dart';
+import 'package:mockito/mockito.dart';
+import 'package:test/test.dart';
+
+void main() {
+  Process _process;
+  AnalysisServerClient serverWrapper;
+
+  setUp(() async {
+    _process = new MockProcess();
+    serverWrapper = new AnalysisServerClient(_process);
+    when(_process.stdin).thenReturn(<int>[]);
+  });
+
+  test('test_listenToOutput_good', () async {
+    when(_process.stdout).thenReturn(_goodMessage());
+
+    final future = serverWrapper.send('blahMethod', null);
+    serverWrapper.listenToOutput();
+
+    final response = await future;
+    expect(response, new isInstanceOf<Map>());
+    final responseAsMap = response as Map;
+    expect(responseAsMap['foo'], 'bar');
+  });
+
+  test('test_listenToOutput_error', () async {
+    when(_process.stdout).thenReturn(_badMessage());
+    final future = serverWrapper.send('blahMethod', null);
+    future.catchError((e) {
+      expect(e, new isInstanceOf<ServerErrorMessage>());
+      final e2 = e as ServerErrorMessage;
+      expect(e2.code, 'someErrorCode');
+      expect(e2.message, 'something went wrong');
+      expect(e2.stackTrace, 'some long stack trace');
+    });
+    serverWrapper.listenToOutput();
+  });
+
+  test('test_listenToOutput_event', () async {
+    when(_process.stdout).thenReturn(_eventMessage());
+
+    void eventHandler(String event, Map<String, Object> params) {
+      expect(event, 'fooEvent');
+      expect(params.length, 2);
+      expect(params['foo'] as String, 'bar');
+      expect(params['baz'] as String, 'bang');
+    }
+
+    serverWrapper.send('blahMethod', null);
+    serverWrapper.listenToOutput(notificationProcessor: eventHandler);
+  });
+}
+
+Stream<List<int>> _goodMessage() async* {
+  yield UTF8.encoder.convert('Observatory listening on foo bar\n');
+  final sampleJson = {
+    'id': '0',
+    'result': {'foo': 'bar'}
+  };
+  yield UTF8.encoder.convert(JSON.encode(sampleJson));
+}
+
+final _badErrorMessage = {
+  'code': 'someErrorCode',
+  'message': 'something went wrong',
+  'stackTrace': 'some long stack trace'
+};
+
+Stream<List<int>> _badMessage() async* {
+  yield UTF8.encoder.convert('Observatory listening on foo bar\n');
+  final sampleJson = {'id': '0', 'error': _badErrorMessage};
+  yield UTF8.encoder.convert(JSON.encode(sampleJson));
+}
+
+Stream<List<int>> _eventMessage() async* {
+  yield UTF8.encoder.convert('Observatory listening on foo bar\n');
+  final sampleJson = {
+    'event': 'fooEvent',
+    'params': {'foo': 'bar', 'baz': 'bang'}
+  };
+  yield UTF8.encoder.convert(JSON.encode(sampleJson));
+}
+
+class MockProcess extends Mock implements Process {}