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
|
RSpec.shared_examples :atomic_fixnum do
context 'construction' do
it 'sets the initial value' do
expect(described_class.new(10).value).to eq 10
end
it 'defaults the initial value to zero' do
expect(described_class.new.value).to eq 0
end
it 'raises an exception if the initial value is not a Fixnum' do
expect { described_class.new(10.01) }.to(raise_error { |error|
expect(error.class).to be(ArgumentError).or(be(TypeError))
})
end
end
context '#value' do
it 'returns the current value' do
counter = described_class.new(10)
expect(counter.value).to eq 10
counter.increment
expect(counter.value).to eq 11
counter.decrement
expect(counter.value).to eq 10
end
end
context '#value=' do
it 'sets the #value to the given `Fixnum`' do
atomic = described_class.new(0)
atomic.value = 10
expect(atomic.value).to eq 10
end
it 'returns the new value' do
atomic = described_class.new(0)
expect(atomic.value = 10).to eq 10
end
it 'raises and exception if the value is not a `Fixnum`' do
atomic = described_class.new(0)
expect {
atomic.value = 'foo'
}.to(raise_error { |error|
expect(error.class).to be(ArgumentError).or(be(TypeError))
})
end
end
context '#increment' do
it 'increases the value by one when no argument is given' do
counter = described_class.new(10)
3.times{ counter.increment }
expect(counter.value).to eq 13
end
it 'returns the new value when no argument is given' do
counter = described_class.new(10)
expect(counter.increment).to eq 11
end
it 'increases the value by the given argument' do
counter = described_class.new(10)
counter.increment(5)
expect(counter.value).to eq 15
end
it 'returns the new value the given argument' do
counter = described_class.new(10)
expect(counter.increment(5)).to eq 15
end
it 'is aliased as #up' do
expect(described_class.new(10).up).to eq 11
end
end
context '#decrement' do
it 'decreases the value by one when no argument is given' do
counter = described_class.new(10)
3.times{ counter.decrement }
expect(counter.value).to eq 7
end
it 'returns the new value when no argument is given' do
counter = described_class.new(10)
expect(counter.decrement).to eq 9
end
it 'decreases the value by the given argument' do
counter = described_class.new(10)
counter.decrement(5)
expect(counter.value).to eq 5
end
it 'returns the new value the given argument' do
counter = described_class.new(10)
expect(counter.decrement(5)).to eq 5
end
it 'is aliased as #down' do
expect(described_class.new(10).down).to eq 9
end
end
context '#compare_and_set' do
it 'returns false if the value is not found' do
expect(described_class.new(14).compare_and_set(2, 14)).to eq false
end
it 'returns true if the value is found' do
expect(described_class.new(14).compare_and_set(14, 2)).to eq true
end
it 'sets if the value is found' do
f = described_class.new(14)
f.compare_and_set(14, 2)
expect(f.value).to eq 2
end
it 'does not set if the value is not found' do
f = described_class.new(14)
f.compare_and_set(2, 12)
expect(f.value).to eq 14
end
end
context '#update' do
it 'passes the current value to the block' do
atomic = described_class.new(1000)
atomic.update { |v| (expect(v).to eq 1000); 1 }
end
it 'atomically sets the value to the return value from the block' do
atomic = described_class.new(1000)
atomic.update { |v| v + 1 }
expect(atomic.value).to eq 1001
end
it 'returns the new value' do
atomic = described_class.new(1000)
expect(atomic.update { |v| v + 1 }).to eq 1001
end
end
end
module Concurrent
RSpec.describe MutexAtomicFixnum do
it_should_behave_like :atomic_fixnum
context 'construction' do
it 'raises an exception if the initial value is too big' do
expect {
described_class.new(Utility::NativeInteger::MAX_VALUE + 1)
}.to raise_error(RangeError)
end
it 'raises an exception if the initial value is too small' do
expect {
described_class.new(Utility::NativeInteger::MIN_VALUE - 1)
}.to raise_error(RangeError)
end
end
context 'instance methods' do
before(:each) do
expect(subject).to receive(:synchronize).with(no_args).and_call_original
end
specify 'value is synchronized' do
subject.value
end
specify 'value= is synchronized' do
subject.value = 10
end
specify 'increment is synchronized' do
subject.increment
end
specify 'decrement is synchronized' do
subject.decrement
end
specify 'compare_and_set is synchronized' do
subject.compare_and_set(14, 2)
end
end
end
if defined? Concurrent::CAtomicFixnum
RSpec.describe CAtomicFixnum do
it_should_behave_like :atomic_fixnum
end
end
if Concurrent.on_jruby?
RSpec.describe JavaAtomicFixnum do
it_should_behave_like :atomic_fixnum
end
end
RSpec.describe AtomicFixnum do
if RUBY_ENGINE != 'ruby'
it 'does not load the C extension' do
expect(defined?(Concurrent::CAtomicFixnum)).to be_falsey
end
end
if Concurrent.on_jruby?
it 'inherits from JavaAtomicFixnum' do
expect(AtomicFixnum.ancestors).to include(JavaAtomicFixnum)
end
elsif defined? Concurrent::CAtomicFixnum
it 'inherits from CAtomicFixnum' do
expect(AtomicFixnum.ancestors).to include(CAtomicFixnum)
end
else
it 'inherits from MutexAtomicFixnum' do
expect(AtomicFixnum.ancestors).to include(MutexAtomicFixnum)
end
end
describe '#to_s and #inspect' do
it 'includes the value' do
subject = described_class.new(42)
expect(subject.to_s).to include('42')
expect(subject.inspect).to include('42')
end
end
end
end
|
