1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/*
*
* Copyright 2014, 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.
*
*/
var assert = require('assert');
var ProtoBuf = require('protobufjs');
var port_picker = require('../port_picker');
var builder = ProtoBuf.loadProtoFile(__dirname + '/../examples/math.proto');
var math = builder.build('math');
var client = require('../surface_client.js');
var makeConstructor = client.makeClientConstructor;
/**
* Get a function that deserializes a specific type of protobuf.
* @param {function()} cls The constructor of the message type to deserialize
* @return {function(Buffer):cls} The deserialization function
*/
function deserializeCls(cls) {
/**
* Deserialize a buffer to a message object
* @param {Buffer} arg_buf The buffer to deserialize
* @return {cls} The resulting object
*/
return function deserialize(arg_buf) {
return cls.decode(arg_buf);
};
}
/**
* Get a function that serializes objects to a buffer by protobuf class.
* @param {function()} Cls The constructor of the message type to serialize
* @return {function(Cls):Buffer} The serialization function
*/
function serializeCls(Cls) {
/**
* Serialize an object to a Buffer
* @param {Object} arg The object to serialize
* @return {Buffer} The serialized object
*/
return function serialize(arg) {
return new Buffer(new Cls(arg).encode().toBuffer());
};
}
/* This function call creates a client constructor for clients that expose the
* four specified methods. This specifies how to serialize messages that the
* client sends and deserialize messages that the server sends, and whether the
* client or the server will send a stream of messages, for each method. This
* also specifies a prefix that will be added to method names when sending them
* on the wire. This function call and all of the preceding code in this file
* are intended to approximate what the generated code will look like for the
* math client */
var MathClient = makeConstructor({
Div: {
serialize: serializeCls(math.DivArgs),
deserialize: deserializeCls(math.DivReply),
client_stream: false,
server_stream: false
},
Fib: {
serialize: serializeCls(math.FibArgs),
deserialize: deserializeCls(math.Num),
client_stream: false,
server_stream: true
},
Sum: {
serialize: serializeCls(math.Num),
deserialize: deserializeCls(math.Num),
client_stream: true,
server_stream: false
},
DivMany: {
serialize: serializeCls(math.DivArgs),
deserialize: deserializeCls(math.DivReply),
client_stream: true,
server_stream: true
}
}, '/Math/');
/**
* Channel to use to make requests to a running server.
*/
var math_client;
/**
* Server to test against
*/
var server = require('../examples/math_server.js');
describe('Math client', function() {
before(function(done) {
port_picker.nextAvailablePort(function(port) {
server.bind(port).listen();
math_client = new MathClient(port);
done();
});
});
after(function() {
server.shutdown();
});
it('should handle a single request', function(done) {
var arg = {dividend: 7, divisor: 4};
var call = math_client.Div(arg, function handleDivResult(err, value) {
assert.ifError(err);
assert.equal(value.quotient, 1);
assert.equal(value.remainder, 3);
});
call.on('status', function checkStatus(status) {
assert.strictEqual(status.code, client.status.OK);
done();
});
});
it('should handle a server streaming request', function(done) {
var call = math_client.Fib({limit: 7});
var expected_results = [1, 1, 2, 3, 5, 8, 13];
var next_expected = 0;
call.on('data', function checkResponse(value) {
assert.equal(value.num, expected_results[next_expected]);
next_expected += 1;
});
call.on('status', function checkStatus(status) {
assert.strictEqual(status.code, client.status.OK);
done();
});
});
it('should handle a client streaming request', function(done) {
var call = math_client.Sum(function handleSumResult(err, value) {
assert.ifError(err);
assert.equal(value.num, 21);
});
for (var i = 0; i < 7; i++) {
call.write({'num': i});
}
call.end();
call.on('status', function checkStatus(status) {
assert.strictEqual(status.code, client.status.OK);
done();
});
});
it('should handle a bidirectional streaming request', function(done) {
function checkResponse(index, value) {
assert.equal(value.quotient, index);
assert.equal(value.remainder, 1);
}
var call = math_client.DivMany();
var response_index = 0;
call.on('data', function(value) {
checkResponse(response_index, value);
response_index += 1;
});
for (var i = 0; i < 7; i++) {
call.write({dividend: 2 * i + 1, divisor: 2});
}
call.end();
call.on('status', function checkStatus(status) {
assert.strictEqual(status.code, client.status.OK);
done();
});
});
});
|
