aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/ruby/spec/generic/service_spec.rb
blob: ad1c268d32cb0689c7648f5992b663475aafb9d1 (plain)
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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
# Copyright 2015 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

require 'grpc'
require 'grpc/generic/rpc_desc'
require 'grpc/generic/service'

# A test message that encodes/decodes using marshal/marshal.
class GoodMsg
  def self.marshal(_o)
    ''
  end

  def self.unmarshal(_o)
    GoodMsg.new
  end
end

# A test message that encodes/decodes using encode/decode.
class EncodeDecodeMsg
  def self.encode(_o)
    ''
  end

  def self.decode(_o)
    GoodMsg.new
  end
end

GenericService = GRPC::GenericService
Dsl = GenericService::Dsl

describe Dsl do
  it 'can be included in new classes' do
    blk = proc { Class.new { include Dsl } }
    expect(&blk).to_not raise_error
  end
end

describe GenericService do
  context '#underscore' do
    it 'should convert CamelCase to underscore separated' do
      expect(GenericService.underscore('AnRPC')).to eq('an_rpc')
      expect(GenericService.underscore('AMethod')).to eq('a_method')
      expect(GenericService.underscore('PrintHTML')).to eq('print_html')
      expect(GenericService.underscore('SeeHTMLBooks')).to eq('see_html_books')
    end
  end

  describe 'including it' do
    it 'adds a class method, rpc' do
      c = Class.new do
        include GenericService
      end
      expect(c.methods).to include(:rpc)
    end

    it 'adds rpc descs using the added class method, #rpc' do
      c = Class.new do
        include GenericService
        rpc :AnRpc, GoodMsg, GoodMsg
      end

      expect(c.rpc_descs).to include(:AnRpc)
      expect(c.rpc_descs[:AnRpc]).to be_a(GRPC::RpcDesc)
    end

    it 'give subclasses access to #rpc_descs' do
      base = Class.new do
        include GenericService
        rpc :AnRpc, GoodMsg, GoodMsg
      end
      c = Class.new(base) do
      end
      expect(c.rpc_descs).to include(:AnRpc)
      expect(c.rpc_descs[:AnRpc]).to be_a(GRPC::RpcDesc)
    end

    it 'adds a default service name' do
      c = Class.new do
        include GenericService
      end
      expect(c.service_name).to eq('GenericService')
    end

    it 'adds a default service name to subclasses' do
      base = Class.new do
        include GenericService
      end
      c = Class.new(base) do
      end
      expect(c.service_name).to eq('GenericService')
    end

    it 'adds the specified service name' do
      c = Class.new do
        include GenericService
        self.service_name = 'test.service.TestService'
      end
      expect(c.service_name).to eq('test.service.TestService')
    end

    it 'adds the specified service name to subclasses' do
      base = Class.new do
        include GenericService
        self.service_name = 'test.service.TestService'
      end
      c = Class.new(base) do
      end
      expect(c.service_name).to eq('test.service.TestService')
    end
  end

  describe '#include' do
    it 'raises if #rpc is missing an arg' do
      blk = proc do
        Class.new do
          include GenericService
          rpc :AnRpc, GoodMsg
        end
      end
      expect(&blk).to raise_error ArgumentError

      blk = proc do
        Class.new do
          include GenericService
          rpc :AnRpc
        end
      end
      expect(&blk).to raise_error ArgumentError
    end

    describe 'when #rpc args are incorrect' do
      it 'raises if an arg does not have the marshal or unmarshal methods' do
        blk = proc do
          Class.new do
            include GenericService
            rpc :AnRpc, GoodMsg, Object
          end
        end
        expect(&blk).to raise_error ArgumentError
      end

      it 'raises if a type arg only has the marshal method' do
        # a bad message type with only a marshal method
        class OnlyMarshal
          def marshal(o)
            o
          end
        end

        blk = proc do
          Class.new do
            include GenericService
            rpc :AnRpc, OnlyMarshal, GoodMsg
          end
        end
        expect(&blk).to raise_error ArgumentError
      end

      it 'raises if a type arg only has the unmarshal method' do
        # a bad message type with only an unmarshal method
        class OnlyUnmarshal
          def self.ummarshal(o)
            o
          end
        end
        blk = proc do
          Class.new do
            include GenericService
            rpc :AnRpc, GoodMsg, OnlyUnmarshal
          end
        end
        expect(&blk).to raise_error ArgumentError
      end
    end

    it 'is ok for services that expect the default {un,}marshal methods' do
      blk = proc do
        Class.new do
          include GenericService
          rpc :AnRpc, GoodMsg, GoodMsg
        end
      end
      expect(&blk).not_to raise_error
    end

    it 'is ok for services that override the default {un,}marshal methods' do
      blk = proc do
        Class.new do
          include GenericService
          self.marshal_class_method = :encode
          self.unmarshal_class_method = :decode
          rpc :AnRpc, EncodeDecodeMsg, EncodeDecodeMsg
        end
      end
      expect(&blk).not_to raise_error
    end
  end

  describe '#rpc_stub_class' do
    it 'generates a client class that defines any of the rpc methods' do
      s = Class.new do
        include GenericService
        rpc :AnRpc, GoodMsg, GoodMsg
        rpc :AServerStreamer, GoodMsg, stream(GoodMsg)
        rpc :AClientStreamer, stream(GoodMsg), GoodMsg
        rpc :ABidiStreamer, stream(GoodMsg), stream(GoodMsg)
      end
      client_class = s.rpc_stub_class
      expect(client_class.instance_methods).to include(:an_rpc)
      expect(client_class.instance_methods).to include(:a_server_streamer)
      expect(client_class.instance_methods).to include(:a_client_streamer)
      expect(client_class.instance_methods).to include(:a_bidi_streamer)
    end

    describe 'the generated instances' do
      it 'can be instanciated with just a hostname and credentials' do
        s = Class.new do
          include GenericService
          rpc :AnRpc, GoodMsg, GoodMsg
          rpc :AServerStreamer, GoodMsg, stream(GoodMsg)
          rpc :AClientStreamer, stream(GoodMsg), GoodMsg
          rpc :ABidiStreamer, stream(GoodMsg), stream(GoodMsg)
        end
        client_class = s.rpc_stub_class
        blk = proc do
          client_class.new('fakehostname', :this_channel_is_insecure)
        end
        expect(&blk).not_to raise_error
      end

      it 'has the methods defined in the service' do
        s = Class.new do
          include GenericService
          rpc :AnRpc, GoodMsg, GoodMsg
          rpc :AServerStreamer, GoodMsg, stream(GoodMsg)
          rpc :AClientStreamer, stream(GoodMsg), GoodMsg
          rpc :ABidiStreamer, stream(GoodMsg), stream(GoodMsg)
        end
        client_class = s.rpc_stub_class
        o = client_class.new('fakehostname', :this_channel_is_insecure)
        expect(o.methods).to include(:an_rpc)
        expect(o.methods).to include(:a_bidi_streamer)
        expect(o.methods).to include(:a_client_streamer)
        expect(o.methods).to include(:a_bidi_streamer)
      end
    end
  end
end