Initial checkin of gRPC to third_party/

third_party/grpc/src/node/test/surface_test.js

Index: third_party/grpc/src/node/test/surface_test.js
diff --git a/third_party/grpc/src/node/test/surface_test.js b/third_party/grpc/src/node/test/surface_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..8a232d6fc44a1ba9c4e89df5891b0d87ce6832d8
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+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+'use strict';
+
+var assert = require('assert');
+
+var surface_client = require('../src/client.js');
+
+var ProtoBuf = require('protobufjs');
+
+var grpc = require('..');
+
+var math_proto = ProtoBuf.loadProtoFile(__dirname +
+    '/../../proto/math/math.proto');
+
+var mathService = math_proto.lookup('math.Math');
+
+var _ = require('lodash');
+
+/**
+ * This is used for testing functions with multiple asynchronous calls that
+ * can happen in different orders. This should be passed the number of async
+ * function invocations that can occur last, and each of those should call this
+ * function's return value
+ * @param {function()} done The function that should be called when a test is
+ *     complete.
+ * @param {number} count The number of calls to the resulting function if the
+ *     test passes.
+ * @return {function()} The function that should be called at the end of each
+ *     sequence of asynchronous functions.
+ */
+function multiDone(done, count) {
+  return function() {
+    count -= 1;
+    if (count <= 0) {
+      done();
+    }
+  };
+}
+
+var server_insecure_creds = grpc.ServerCredentials.createInsecure();
+
+describe('File loader', function() {
+  it('Should load a proto file by default', function() {
+    assert.doesNotThrow(function() {
+      grpc.load(__dirname + '/test_service.proto');
+    });
+  });
+  it('Should load a proto file with the proto format', function() {
+    assert.doesNotThrow(function() {
+      grpc.load(__dirname + '/test_service.proto', 'proto');
+    });
+  });
+  it('Should load a json file with the json format', function() {
+    assert.doesNotThrow(function() {
+      grpc.load(__dirname + '/test_service.json', 'json');
+    });
+  });
+  it('Should fail to load a file with an unknown format', function() {
+    assert.throws(function() {
+      grpc.load(__dirname + '/test_service.proto', 'fake_format');
+    });
+  });
+});
+describe('surface Server', function() {
+  var server;
+  beforeEach(function() {
+    server = new grpc.Server();
+  });
+  afterEach(function() {
+    server.forceShutdown();
+  });
+  it('should error if started twice', function() {
+    server.start();
+    assert.throws(function() {
+      server.start();
+    });
+  });
+  it('should error if a port is bound after the server starts', function() {
+    server.start();
+    assert.throws(function() {
+      server.bind('localhost:0', grpc.ServerCredentials.createInsecure());
+    });
+  });
+  it('should successfully shutdown if tryShutdown is called', function(done) {
+    server.start();
+    server.tryShutdown(done);
+  });
+});
+describe('Server.prototype.addProtoService', function() {
+  var server;
+  var dummyImpls = {
+    'div': function() {},
+    'divMany': function() {},
+    'fib': function() {},
+    'sum': function() {}
+  };
+  beforeEach(function() {
+    server = new grpc.Server();
+  });
+  afterEach(function() {
+    server.forceShutdown();
+  });
+  it('Should succeed with a single service', function() {
+    assert.doesNotThrow(function() {
+      server.addProtoService(mathService, dummyImpls);
+    });
+  });
+  it('Should fail with conflicting method names', function() {
+    server.addProtoService(mathService, dummyImpls);
+    assert.throws(function() {
+      server.addProtoService(mathService, dummyImpls);
+    });
+  });
+  it('Should fail with missing handlers', function() {
+    assert.throws(function() {
+      server.addProtoService(mathService, {
+        'div': function() {},
+        'divMany': function() {},
+        'fib': function() {}
+      });
+    }, /math.Math.Sum/);
+  });
+  it('Should fail if the server has been started', function() {
+    server.start();
+    assert.throws(function() {
+      server.addProtoService(mathService, dummyImpls);
+    });
+  });
+});
+describe('Client constructor building', function() {
+  var illegal_service_attrs = {
+    $method : {
+      path: '/illegal/$method',
+      requestStream: false,
+      responseStream: false,
+      requestSerialize: _.identity,
+      requestDeserialize: _.identity,
+      responseSerialize: _.identity,
+      responseDeserialize: _.identity
+    }
+  };
+  it('Should reject method names starting with $', function() {
+    assert.throws(function() {
+      grpc.makeGenericClientConstructor(illegal_service_attrs);
+    }, /\$/);
+  });
+});
+describe('waitForClientReady', function() {
+  var server;
+  var port;
+  var Client;
+  var client;
+  before(function() {
+    server = new grpc.Server();
+    port = server.bind('localhost:0', grpc.ServerCredentials.createInsecure());
+    server.start();
+    Client = surface_client.makeProtobufClientConstructor(mathService);
+  });
+  beforeEach(function() {
+    client = new Client('localhost:' + port, grpc.credentials.createInsecure());
+  });
+  after(function() {
+    server.forceShutdown();
+  });
+  it('should complete when called alone', function(done) {
+    grpc.waitForClientReady(client, Infinity, function(error) {
+      assert.ifError(error);
+      done();
+    });
+  });
+  it('should complete when a call is initiated', function(done) {
+    grpc.waitForClientReady(client, Infinity, function(error) {
+      assert.ifError(error);
+      done();
+    });
+    var call = client.div({}, function(err, response) {});
+    call.cancel();
+  });
+  it('should complete if called more than once', function(done) {
+    done = multiDone(done, 2);
+    grpc.waitForClientReady(client, Infinity, function(error) {
+      assert.ifError(error);
+      done();
+    });
+    grpc.waitForClientReady(client, Infinity, function(error) {
+      assert.ifError(error);
+      done();
+    });
+  });
+  it('should complete if called when already ready', function(done) {
+    grpc.waitForClientReady(client, Infinity, function(error) {
+      assert.ifError(error);
+      grpc.waitForClientReady(client, Infinity, function(error) {
+        assert.ifError(error);
+        done();
+      });
+    });
+  });
+  it('should time out if the server does not exist', function(done) {
+    var bad_client = new Client('nonexistent_hostname',
+                                grpc.credentials.createInsecure());
+    var deadline = new Date();
+    deadline.setSeconds(deadline.getSeconds() + 1);
+    grpc.waitForClientReady(bad_client, deadline, function(error) {
+      assert(error);
+      done();
+    });
+  });
+});
+describe('Echo service', function() {
+  var server;
+  var client;
+  before(function() {
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/echo_service.proto');
+    var echo_service = test_proto.lookup('EchoService');
+    server = new grpc.Server();
+    server.addProtoService(echo_service, {
+      echo: function(call, callback) {
+        callback(null, call.request);
+      }
+    });
+    var port = server.bind('localhost:0', server_insecure_creds);
+    var Client = surface_client.makeProtobufClientConstructor(echo_service);
+    client = new Client('localhost:' + port, grpc.credentials.createInsecure());
+    server.start();
+  });
+  after(function() {
+    server.forceShutdown();
+  });
+  it('should echo the recieved message directly', function(done) {
+    client.echo({value: 'test value', value2: 3}, function(error, response) {
+      assert.ifError(error);
+      assert.deepEqual(response, {value: 'test value', value2: 3});
+      done();
+    });
+  });
+});
+describe('Generic client and server', function() {
+  function toString(val) {
+    return val.toString();
+  }
+  function toBuffer(str) {
+    return new Buffer(str);
+  }
+  var string_service_attrs = {
+    'capitalize' : {
+      path: '/string/capitalize',
+      requestStream: false,
+      responseStream: false,
+      requestSerialize: toBuffer,
+      requestDeserialize: toString,
+      responseSerialize: toBuffer,
+      responseDeserialize: toString
+    }
+  };
+  describe('String client and server', function() {
+    var client;
+    var server;
+    before(function() {
+      server = new grpc.Server();
+      server.addService(string_service_attrs, {
+        capitalize: function(call, callback) {
+          callback(null, _.capitalize(call.request));
+        }
+      });
+      var port = server.bind('localhost:0', server_insecure_creds);
+      server.start();
+      var Client = grpc.makeGenericClientConstructor(string_service_attrs);
+      client = new Client('localhost:' + port,
+                          grpc.credentials.createInsecure());
+    });
+    after(function() {
+      server.forceShutdown();
+    });
+    it('Should respond with a capitalized string', function(done) {
+      client.capitalize('abc', function(err, response) {
+        assert.ifError(err);
+        assert.strictEqual(response, 'Abc');
+        done();
+      });
+    });
+  });
+});
+describe('Server-side getPeer', function() {
+  function toString(val) {
+    return val.toString();
+  }
+  function toBuffer(str) {
+    return new Buffer(str);
+  }
+  var string_service_attrs = {
+    'getPeer' : {
+      path: '/string/getPeer',
+      requestStream: false,
+      responseStream: false,
+      requestSerialize: toBuffer,
+      requestDeserialize: toString,
+      responseSerialize: toBuffer,
+      responseDeserialize: toString
+    }
+  };
+  var client;
+  var server;
+  before(function() {
+    server = new grpc.Server();
+    server.addService(string_service_attrs, {
+      getPeer: function(call, callback) {
+        try {
+          callback(null, call.getPeer());
+        } catch (e) {
+          call.emit('error', e);
+        }
+      }
+    });
+    var port = server.bind('localhost:0', server_insecure_creds);
+    server.start();
+    var Client = grpc.makeGenericClientConstructor(string_service_attrs);
+    client = new Client('localhost:' + port,
+                        grpc.credentials.createInsecure());
+  });
+  after(function() {
+    server.forceShutdown();
+  });
+  it('should respond with a string representing the client', function(done) {
+    client.getPeer('', function(err, response) {
+      assert.ifError(err);
+      // We don't expect a specific value, just that it worked without error
+      done();
+    });
+  });
+});
+describe('Echo metadata', function() {
+  var client;
+  var server;
+  var metadata;
+  before(function() {
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/test_service.proto');
+    var test_service = test_proto.lookup('TestService');
+    server = new grpc.Server();
+    server.addProtoService(test_service, {
+      unary: function(call, cb) {
+        call.sendMetadata(call.metadata);
+        cb(null, {});
+      },
+      clientStream: function(stream, cb){
+        stream.on('data', function(data) {});
+        stream.on('end', function() {
+          stream.sendMetadata(stream.metadata);
+          cb(null, {});
+        });
+      },
+      serverStream: function(stream) {
+        stream.sendMetadata(stream.metadata);
+        stream.end();
+      },
+      bidiStream: function(stream) {
+        stream.on('data', function(data) {});
+        stream.on('end', function() {
+          stream.sendMetadata(stream.metadata);
+          stream.end();
+        });
+      }
+    });
+    var port = server.bind('localhost:0', server_insecure_creds);
+    var Client = surface_client.makeProtobufClientConstructor(test_service);
+    client = new Client('localhost:' + port, grpc.credentials.createInsecure());
+    server.start();
+    metadata = new grpc.Metadata();
+    metadata.set('key', 'value');
+  });
+  after(function() {
+    server.forceShutdown();
+  });
+  it('with unary call', function(done) {
+    var call = client.unary({}, function(err, data) {
+      assert.ifError(err);
+    }, metadata);
+    call.on('metadata', function(metadata) {
+      assert.deepEqual(metadata.get('key'), ['value']);
+      done();
+    });
+  });
+  it('with client stream call', function(done) {
+    var call = client.clientStream(function(err, data) {
+      assert.ifError(err);
+    }, metadata);
+    call.on('metadata', function(metadata) {
+      assert.deepEqual(metadata.get('key'), ['value']);
+      done();
+    });
+    call.end();
+  });
+  it('with server stream call', function(done) {
+    var call = client.serverStream({}, metadata);
+    call.on('data', function() {});
+    call.on('metadata', function(metadata) {
+      assert.deepEqual(metadata.get('key'), ['value']);
+      done();
+    });
+  });
+  it('with bidi stream call', function(done) {
+    var call = client.bidiStream(metadata);
+    call.on('data', function() {});
+    call.on('metadata', function(metadata) {
+      assert.deepEqual(metadata.get('key'), ['value']);
+      done();
+    });
+    call.end();
+  });
+  it('shows the correct user-agent string', function(done) {
+    var version = require('../../../package.json').version;
+    var call = client.unary({}, function(err, data) { assert.ifError(err); },
+                            metadata);
+    call.on('metadata', function(metadata) {
+      assert(_.startsWith(metadata.get('user-agent')[0],
+                          'grpc-node/' + version));
+      done();
+    });
+  });
+  it('properly handles duplicate values', function(done) {
+    var dup_metadata = metadata.clone();
+    dup_metadata.add('key', 'value2');
+    var call = client.unary({}, function(err, data) {assert.ifError(err); },
+                            dup_metadata);
+    call.on('metadata', function(resp_metadata) {
+      // Two arrays are equal iff their symmetric difference is empty
+      assert.deepEqual(_.xor(dup_metadata.get('key'), resp_metadata.get('key')),
+                       []);
+      done();
+    });
+  });
+});
+describe('Client malformed response handling', function() {
+  var server;
+  var client;
+  var badArg = new Buffer([0xFF]);
+  before(function() {
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/test_service.proto');
+    var test_service = test_proto.lookup('TestService');
+    var malformed_test_service = {
+      unary: {
+        path: '/TestService/Unary',
+        requestStream: false,
+        responseStream: false,
+        requestDeserialize: _.identity,
+        responseSerialize: _.identity
+      },
+      clientStream: {
+        path: '/TestService/ClientStream',
+        requestStream: true,
+        responseStream: false,
+        requestDeserialize: _.identity,
+        responseSerialize: _.identity
+      },
+      serverStream: {
+        path: '/TestService/ServerStream',
+        requestStream: false,
+        responseStream: true,
+        requestDeserialize: _.identity,
+        responseSerialize: _.identity
+      },
+      bidiStream: {
+        path: '/TestService/BidiStream',
+        requestStream: true,
+        responseStream: true,
+        requestDeserialize: _.identity,
+        responseSerialize: _.identity
+      }
+    };
+    server = new grpc.Server();
+    server.addService(malformed_test_service, {
+      unary: function(call, cb) {
+        cb(null, badArg);
+      },
+      clientStream: function(stream, cb) {
+        stream.on('data', function() {/* Ignore requests */});
+        stream.on('end', function() {
+          cb(null, badArg);
+        });
+      },
+      serverStream: function(stream) {
+        stream.write(badArg);
+        stream.end();
+      },
+      bidiStream: function(stream) {
+        stream.on('data', function() {
+          // Ignore requests
+          stream.write(badArg);
+        });
+        stream.on('end', function() {
+          stream.end();
+        });
+      }
+    });
+    var port = server.bind('localhost:0', server_insecure_creds);
+    var Client = surface_client.makeProtobufClientConstructor(test_service);
+    client = new Client('localhost:' + port, grpc.credentials.createInsecure());
+    server.start();
+  });
+  after(function() {
+    server.forceShutdown();
+  });
+  it('should get an INTERNAL status with a unary call', function(done) {
+    client.unary({}, function(err, data) {
+      assert(err);
+      assert.strictEqual(err.code, grpc.status.INTERNAL);
+      done();
+    });
+  });
+  it('should get an INTERNAL status with a client stream call', function(done) {
+    var call = client.clientStream(function(err, data) {
+      assert(err);
+      assert.strictEqual(err.code, grpc.status.INTERNAL);
+      done();
+    });
+    call.write({});
+    call.end();
+  });
+  it('should get an INTERNAL status with a server stream call', function(done) {
+    var call = client.serverStream({});
+    call.on('data', function(){});
+    call.on('error', function(err) {
+      assert.strictEqual(err.code, grpc.status.INTERNAL);
+      done();
+    });
+  });
+  it('should get an INTERNAL status with a bidi stream call', function(done) {
+    var call = client.bidiStream();
+    call.on('data', function(){});
+    call.on('error', function(err) {
+      assert.strictEqual(err.code, grpc.status.INTERNAL);
+      done();
+    });
+    call.write({});
+    call.end();
+  });
+});
+describe('Other conditions', function() {
+  var test_service;
+  var Client;
+  var client;
+  var server;
+  var port;
+  before(function() {
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/test_service.proto');
+    test_service = test_proto.lookup('TestService');
+    server = new grpc.Server();
+    var trailer_metadata = new grpc.Metadata();
+    trailer_metadata.add('trailer-present', 'yes');
+    server.addProtoService(test_service, {
+      unary: function(call, cb) {
+        var req = call.request;
+        if (req.error) {
+          cb({code: grpc.status.UNKNOWN,
+              details: 'Requested error'}, null, trailer_metadata);
+        } else {
+          cb(null, {count: 1}, trailer_metadata);
+        }
+      },
+      clientStream: function(stream, cb){
+        var count = 0;
+        var errored;
+        stream.on('data', function(data) {
+          if (data.error) {
+            errored = true;
+            cb(new Error('Requested error'), null, trailer_metadata);
+          } else {
+            count += 1;
+          }
+        });
+        stream.on('end', function() {
+          if (!errored) {
+            cb(null, {count: count}, trailer_metadata);
+          }
+        });
+      },
+      serverStream: function(stream) {
+        var req = stream.request;
+        if (req.error) {
+          var err = {code: grpc.status.UNKNOWN,
+                     details: 'Requested error'};
+          err.metadata = trailer_metadata;
+          stream.emit('error', err);
+        } else {
+          for (var i = 0; i < 5; i++) {
+            stream.write({count: i});
+          }
+          stream.end(trailer_metadata);
+        }
+      },
+      bidiStream: function(stream) {
+        var count = 0;
+        stream.on('data', function(data) {
+          if (data.error) {
+            var err = new Error('Requested error');
+            err.metadata = trailer_metadata.clone();
+            err.metadata.add('count', '' + count);
+            stream.emit('error', err);
+          } else {
+            stream.write({count: count});
+            count += 1;
+          }
+        });
+        stream.on('end', function() {
+          stream.end(trailer_metadata);
+        });
+      }
+    });
+    port = server.bind('localhost:0', server_insecure_creds);
+    Client = surface_client.makeProtobufClientConstructor(test_service);
+    client = new Client('localhost:' + port, grpc.credentials.createInsecure());
+    server.start();
+  });
+  after(function() {
+    server.forceShutdown();
+  });
+  it('channel.getTarget should be available', function() {
+    assert.strictEqual(typeof grpc.getClientChannel(client).getTarget(),
+                       'string');
+  });
+  it('client should be able to pause and resume a stream', function(done) {
+    var call = client.bidiStream();
+    call.on('data', function(data) {
+      assert(data.count < 3);
+      call.pause();
+      setTimeout(function() {
+        call.resume();
+      }, 10);
+    });
+    call.on('end', function() {
+      done();
+    });
+    call.write({});
+    call.write({});
+    call.write({});
+    call.end();
+  });
+  describe('Server recieving bad input', function() {
+    var misbehavingClient;
+    var badArg = new Buffer([0xFF]);
+    before(function() {
+      var test_service_attrs = {
+        unary: {
+          path: '/TestService/Unary',
+          requestStream: false,
+          responseStream: false,
+          requestSerialize: _.identity,
+          responseDeserialize: _.identity
+        },
+        clientStream: {
+          path: '/TestService/ClientStream',
+          requestStream: true,
+          responseStream: false,
+          requestSerialize: _.identity,
+          responseDeserialize: _.identity
+        },
+        serverStream: {
+          path: '/TestService/ServerStream',
+          requestStream: false,
+          responseStream: true,
+          requestSerialize: _.identity,
+          responseDeserialize: _.identity
+        },
+        bidiStream: {
+          path: '/TestService/BidiStream',
+          requestStream: true,
+          responseStream: true,
+          requestSerialize: _.identity,
+          responseDeserialize: _.identity
+        }
+      };
+      var Client = surface_client.makeClientConstructor(test_service_attrs,
+                                                        'TestService');
+      misbehavingClient = new Client('localhost:' + port,
+                                     grpc.credentials.createInsecure());
+    });
+    it('should respond correctly to a unary call', function(done) {
+      misbehavingClient.unary(badArg, function(err, data) {
+        assert(err);
+        assert.strictEqual(err.code, grpc.status.INVALID_ARGUMENT);
+        done();
+      });
+    });
+    it('should respond correctly to a client stream', function(done) {
+      var call = misbehavingClient.clientStream(function(err, data) {
+        assert(err);
+        assert.strictEqual(err.code, grpc.status.INVALID_ARGUMENT);
+        done();
+      });
+      call.write(badArg);
+      // TODO(mlumish): Remove call.end()
+      call.end();
+    });
+    it('should respond correctly to a server stream', function(done) {
+      var call = misbehavingClient.serverStream(badArg);
+      call.on('data', function(data) {
+        assert.fail(data, null, 'Unexpected data', '===');
+      });
+      call.on('error', function(err) {
+        assert.strictEqual(err.code, grpc.status.INVALID_ARGUMENT);
+        done();
+      });
+    });
+    it('should respond correctly to a bidi stream', function(done) {
+      var call = misbehavingClient.bidiStream();
+      call.on('data', function(data) {
+        assert.fail(data, null, 'Unexpected data', '===');
+      });
+      call.on('error', function(err) {
+        assert.strictEqual(err.code, grpc.status.INVALID_ARGUMENT);
+        done();
+      });
+      call.write(badArg);
+      // TODO(mlumish): Remove call.end()
+      call.end();
+    });
+  });
+  describe('Trailing metadata', function() {
+    it('should be present when a unary call succeeds', function(done) {
+      var call = client.unary({error: false}, function(err, data) {
+        assert.ifError(err);
+      });
+      call.on('status', function(status) {
+        assert.deepEqual(status.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+    it('should be present when a unary call fails', function(done) {
+      var call = client.unary({error: true}, function(err, data) {
+        assert(err);
+      });
+      call.on('status', function(status) {
+        assert.deepEqual(status.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+    it('should be present when a client stream call succeeds', function(done) {
+      var call = client.clientStream(function(err, data) {
+        assert.ifError(err);
+      });
+      call.write({error: false});
+      call.write({error: false});
+      call.end();
+      call.on('status', function(status) {
+        assert.deepEqual(status.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+    it('should be present when a client stream call fails', function(done) {
+      var call = client.clientStream(function(err, data) {
+        assert(err);
+      });
+      call.write({error: false});
+      call.write({error: true});
+      call.end();
+      call.on('status', function(status) {
+        assert.deepEqual(status.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+    it('should be present when a server stream call succeeds', function(done) {
+      var call = client.serverStream({error: false});
+      call.on('data', function(){});
+      call.on('status', function(status) {
+        assert.strictEqual(status.code, grpc.status.OK);
+        assert.deepEqual(status.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+    it('should be present when a server stream call fails', function(done) {
+      var call = client.serverStream({error: true});
+      call.on('data', function(){});
+      call.on('error', function(error) {
+        assert.deepEqual(error.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+    it('should be present when a bidi stream succeeds', function(done) {
+      var call = client.bidiStream();
+      call.write({error: false});
+      call.write({error: false});
+      call.end();
+      call.on('data', function(){});
+      call.on('status', function(status) {
+        assert.strictEqual(status.code, grpc.status.OK);
+        assert.deepEqual(status.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+    it('should be present when a bidi stream fails', function(done) {
+      var call = client.bidiStream();
+      call.write({error: false});
+      call.write({error: true});
+      call.end();
+      call.on('data', function(){});
+      call.on('error', function(error) {
+        assert.deepEqual(error.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+  });
+  describe('Error object should contain the status', function() {
+    it('for a unary call', function(done) {
+      client.unary({error: true}, function(err, data) {
+        assert(err);
+        assert.strictEqual(err.code, grpc.status.UNKNOWN);
+        assert.strictEqual(err.message, 'Requested error');
+        done();
+      });
+    });
+    it('for a client stream call', function(done) {
+      var call = client.clientStream(function(err, data) {
+        assert(err);
+        assert.strictEqual(err.code, grpc.status.UNKNOWN);
+        assert.strictEqual(err.message, 'Requested error');
+        done();
+      });
+      call.write({error: false});
+      call.write({error: true});
+      call.end();
+    });
+    it('for a server stream call', function(done) {
+      var call = client.serverStream({error: true});
+      call.on('data', function(){});
+      call.on('error', function(error) {
+        assert.strictEqual(error.code, grpc.status.UNKNOWN);
+        assert.strictEqual(error.message, 'Requested error');
+        done();
+      });
+    });
+    it('for a bidi stream call', function(done) {
+      var call = client.bidiStream();
+      call.write({error: false});
+      call.write({error: true});
+      call.end();
+      call.on('data', function(){});
+      call.on('error', function(error) {
+        assert.strictEqual(error.code, grpc.status.UNKNOWN);
+        assert.strictEqual(error.message, 'Requested error');
+        done();
+      });
+    });
+  });
+  describe('call.getPeer should return the peer', function() {
+    it('for a unary call', function(done) {
+      var call = client.unary({error: false}, function(err, data) {
+        assert.ifError(err);
+        done();
+      });
+      assert.strictEqual(typeof call.getPeer(), 'string');
+    });
+    it('for a client stream call', function(done) {
+      var call = client.clientStream(function(err, data) {
+        assert.ifError(err);
+        done();
+      });
+      assert.strictEqual(typeof call.getPeer(), 'string');
+      call.write({error: false});
+      call.end();
+    });
+    it('for a server stream call', function(done) {
+      var call = client.serverStream({error: false});
+      assert.strictEqual(typeof call.getPeer(), 'string');
+      call.on('data', function(){});
+      call.on('status', function(status) {
+        assert.strictEqual(status.code, grpc.status.OK);
+        done();
+      });
+    });
+    it('for a bidi stream call', function(done) {
+      var call = client.bidiStream();
+      assert.strictEqual(typeof call.getPeer(), 'string');
+      call.write({error: false});
+      call.end();
+      call.on('data', function(){});
+      call.on('status', function(status) {
+        done();
+      });
+    });
+  });
+});
+describe('Call propagation', function() {
+  var proxy;
+  var proxy_impl;
+
+  var test_service;
+  var Client;
+  var client;
+  var server;
+  before(function() {
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/test_service.proto');
+    test_service = test_proto.lookup('TestService');
+    server = new grpc.Server();
+    server.addProtoService(test_service, {
+      unary: function(call) {},
+      clientStream: function(stream) {},
+      serverStream: function(stream) {},
+      bidiStream: function(stream) {}
+    });
+    var port = server.bind('localhost:0', server_insecure_creds);
+    Client = surface_client.makeProtobufClientConstructor(test_service);
+    client = new Client('localhost:' + port, grpc.credentials.createInsecure());
+    server.start();
+  });
+  after(function() {
+    server.forceShutdown();
+  });
+  beforeEach(function() {
+    proxy = new grpc.Server();
+    proxy_impl = {
+      unary: function(call) {},
+      clientStream: function(stream) {},
+      serverStream: function(stream) {},
+      bidiStream: function(stream) {}
+    };
+  });
+  afterEach(function() {
+    proxy.forceShutdown();
+  });
+  describe('Cancellation', function() {
+    it('With a unary call', function(done) {
+      done = multiDone(done, 2);
+      var call;
+      proxy_impl.unary = function(parent, callback) {
+        client.unary(parent.request, function(err, value) {
+          try {
+            assert(err);
+            assert.strictEqual(err.code, grpc.status.CANCELLED);
+          } finally {
+            callback(err, value);
+            done();
+          }
+        }, null, {parent: parent});
+        call.cancel();
+      };
+      proxy.addProtoService(test_service, proxy_impl);
+      var proxy_port = proxy.bind('localhost:0', server_insecure_creds);
+      proxy.start();
+      var proxy_client = new Client('localhost:' + proxy_port,
+                                    grpc.credentials.createInsecure());
+      call = proxy_client.unary({}, function(err, value) { done(); });
+    });
+    it('With a client stream call', function(done) {
+      done = multiDone(done, 2);
+      var call;
+      proxy_impl.clientStream = function(parent, callback) {
+        client.clientStream(function(err, value) {
+          try {
+            assert(err);
+            assert.strictEqual(err.code, grpc.status.CANCELLED);
+          } finally {
+            callback(err, value);
+            done();
+          }
+        }, null, {parent: parent});
+        call.cancel();
+      };
+      proxy.addProtoService(test_service, proxy_impl);
+      var proxy_port = proxy.bind('localhost:0', server_insecure_creds);
+      proxy.start();
+      var proxy_client = new Client('localhost:' + proxy_port,
+                                    grpc.credentials.createInsecure());
+      call = proxy_client.clientStream(function(err, value) { done(); });
+    });
+    it('With a server stream call', function(done) {
+      done = multiDone(done, 2);
+      var call;
+      proxy_impl.serverStream = function(parent) {
+        var child = client.serverStream(parent.request, null,
+                                        {parent: parent});
+        child.on('data', function() {});
+        child.on('error', function(err) {
+          assert(err);
+          assert.strictEqual(err.code, grpc.status.CANCELLED);
+          done();
+        });
+        call.cancel();
+      };
+      proxy.addProtoService(test_service, proxy_impl);
+      var proxy_port = proxy.bind('localhost:0', server_insecure_creds);
+      proxy.start();
+      var proxy_client = new Client('localhost:' + proxy_port,
+                                    grpc.credentials.createInsecure());
+      call = proxy_client.serverStream({});
+      call.on('data', function() {});
+      call.on('error', function(err) {
+        done();
+      });
+    });
+    it('With a bidi stream call', function(done) {
+      done = multiDone(done, 2);
+      var call;
+      proxy_impl.bidiStream = function(parent) {
+        var child = client.bidiStream(null, {parent: parent});
+        child.on('data', function() {});
+        child.on('error', function(err) {
+          assert(err);
+          assert.strictEqual(err.code, grpc.status.CANCELLED);
+          done();
+        });
+        call.cancel();
+      };
+      proxy.addProtoService(test_service, proxy_impl);
+      var proxy_port = proxy.bind('localhost:0', server_insecure_creds);
+      proxy.start();
+      var proxy_client = new Client('localhost:' + proxy_port,
+                                    grpc.credentials.createInsecure());
+      call = proxy_client.bidiStream();
+      call.on('data', function() {});
+      call.on('error', function(err) {
+        done();
+      });
+    });
+  });
+  describe('Deadline', function() {
+    /* jshint bitwise:false */
+    var deadline_flags = (grpc.propagate.DEFAULTS &
+        ~grpc.propagate.CANCELLATION);
+    it('With a client stream call', function(done) {
+      done = multiDone(done, 2);
+      proxy_impl.clientStream = function(parent, callback) {
+        client.clientStream(function(err, value) {
+          try {
+            assert(err);
+            assert(err.code === grpc.status.DEADLINE_EXCEEDED ||
+                err.code === grpc.status.INTERNAL);
+          } finally {
+            callback(err, value);
+            done();
+          }
+        }, null, {parent: parent, propagate_flags: deadline_flags});
+      };
+      proxy.addProtoService(test_service, proxy_impl);
+      var proxy_port = proxy.bind('localhost:0', server_insecure_creds);
+      proxy.start();
+      var proxy_client = new Client('localhost:' + proxy_port,
+                                    grpc.credentials.createInsecure());
+      var deadline = new Date();
+      deadline.setSeconds(deadline.getSeconds() + 1);
+      proxy_client.clientStream(function(err, value) {
+        done();
+      }, null, {deadline: deadline});
+    });
+    it('With a bidi stream call', function(done) {
+      done = multiDone(done, 2);
+      proxy_impl.bidiStream = function(parent) {
+        var child = client.bidiStream(
+            null, {parent: parent, propagate_flags: deadline_flags});
+        child.on('data', function() {});
+        child.on('error', function(err) {
+          assert(err);
+          assert(err.code === grpc.status.DEADLINE_EXCEEDED ||
+              err.code === grpc.status.INTERNAL);
+          done();
+        });
+      };
+      proxy.addProtoService(test_service, proxy_impl);
+      var proxy_port = proxy.bind('localhost:0', server_insecure_creds);
+      proxy.start();
+      var proxy_client = new Client('localhost:' + proxy_port,
+                                    grpc.credentials.createInsecure());
+      var deadline = new Date();
+      deadline.setSeconds(deadline.getSeconds() + 1);
+      var call = proxy_client.bidiStream(null, {deadline: deadline});
+      call.on('data', function() {});
+      call.on('error', function(err) {
+        done();
+      });
+    });
+  });
+});
+describe('Cancelling surface client', function() {
+  var client;
+  var server;
+  before(function() {
+    server = new grpc.Server();
+    server.addProtoService(mathService, {
+      'div': function(stream) {},
+      'divMany': function(stream) {},
+      'fib': function(stream) {},
+      'sum': function(stream) {}
+    });
+    var port = server.bind('localhost:0', server_insecure_creds);
+    var Client = surface_client.makeProtobufClientConstructor(mathService);
+    client = new Client('localhost:' + port, grpc.credentials.createInsecure());
+    server.start();
+  });
+  after(function() {
+    server.forceShutdown();
+  });
+  it('Should correctly cancel a unary call', function(done) {
+    var call = client.div({'divisor': 0, 'dividend': 0}, function(err, resp) {
+      assert.strictEqual(err.code, surface_client.status.CANCELLED);
+      done();
+    });
+    call.cancel();
+  });
+  it('Should correctly cancel a client stream call', function(done) {
+    var call = client.sum(function(err, resp) {
+      assert.strictEqual(err.code, surface_client.status.CANCELLED);
+      done();
+    });
+    call.cancel();
+  });
+  it('Should correctly cancel a server stream call', function(done) {
+    var call = client.fib({'limit': 5});
+    call.on('data', function() {});
+    call.on('error', function(error) {
+      assert.strictEqual(error.code, surface_client.status.CANCELLED);
+      done();
+    });
+    call.cancel();
+  });
+  it('Should correctly cancel a bidi stream call', function(done) {
+    var call = client.divMany();
+    call.on('data', function() {});
+    call.on('error', function(error) {
+      assert.strictEqual(error.code, surface_client.status.CANCELLED);
+      done();
+    });
+    call.cancel();
+  });
+});