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
262
263
264
265
266
267
|
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Numeric#step" do
before :each do
ScratchPad.record []
@prc = lambda { |x| ScratchPad << x }
end
it "raises an ArgumentError when step is 0" do
lambda { 1.step(5, 0) {} }.should raise_error(ArgumentError)
end
it "raises an ArgumentError when step is 0.0" do
lambda { 1.step(2, 0.0) {} }.should raise_error(ArgumentError)
end
it "defaults to step = 1" do
1.step(5, &@prc)
ScratchPad.recorded.should == [1, 2, 3, 4, 5]
end
ruby_version_is "1.8.7" do
it "returns an Enumerator when step is 0" do
1.step(2, 0).should be_an_instance_of(enumerator_class)
end
it "returns an Enumerator when not passed a block and self > stop" do
1.step(0, 2).should be_an_instance_of(enumerator_class)
end
it "returns an Enumerator when not passed a block and self < stop" do
1.step(2, 3).should be_an_instance_of(enumerator_class)
end
it "returns an Enumerator that uses the given step" do
0.step(5, 2).to_a.should == [0, 2, 4]
end
end
describe "with [stop, step]" do
before :each do
@stop = mock("Numeric#step stop value")
@step = mock("Numeric#step step value")
@obj = NumericSpecs::Subclass.new
end
ruby_version_is ""..."1.8.7" do
it "does not raise a LocalJumpError when not passed a block and self > stop" do
@step.should_receive(:>).with(0).and_return(true)
@obj.should_receive(:>).with(@stop).and_return(true)
@obj.step(@stop, @step)
end
it "raises a LocalJumpError when not passed a block and self < stop" do
@step.should_receive(:>).with(0).and_return(true)
@obj.should_receive(:>).with(@stop).and_return(false)
lambda { @obj.step(@stop, @step) }.should raise_error(LocalJumpError)
end
end
it "increments self using #+ until self > stop when step > 0" do
@step.should_receive(:>).with(0).and_return(true)
@obj.should_receive(:>).with(@stop).and_return(false, false, false, true)
@obj.should_receive(:+).with(@step).and_return(@obj, @obj, @obj)
@obj.step(@stop, @step, &@prc)
ScratchPad.recorded.should == [@obj, @obj, @obj]
end
it "decrements self using #+ until self < stop when step < 0" do
@step.should_receive(:>).with(0).and_return(false)
@obj.should_receive(:<).with(@stop).and_return(false, false, false, true)
@obj.should_receive(:+).with(@step).and_return(@obj, @obj, @obj)
@obj.step(@stop, @step, &@prc)
ScratchPad.recorded.should == [@obj, @obj, @obj]
end
end
describe "Numeric#step with [stop, step] when self, stop and step are Fixnums" do
it "yields only Fixnums" do
1.step(5, 1) { |x| x.should be_kind_of(Fixnum) }
end
end
describe "Numeric#step with [stop, +step] when self, stop and step are Fixnums" do
it "yields while increasing self by step until stop is reached" do
1.step(5, 1, &@prc)
ScratchPad.recorded.should == [1, 2, 3, 4, 5]
end
it "yields once when self equals stop" do
1.step(1, 1, &@prc)
ScratchPad.recorded.should == [1]
end
it "does not yield when self is greater than stop" do
2.step(1, 1, &@prc)
ScratchPad.recorded.should == []
end
end
describe "Numeric#step with [stop, -step] when self, stop and step are Fixnums" do
it "yields while decreasing self by step until stop is reached" do
5.step(1, -1, &@prc)
ScratchPad.recorded.should == [5, 4, 3, 2, 1]
end
it "yields once when self equals stop" do
5.step(5, -1, &@prc)
ScratchPad.recorded.should == [5]
end
it "does not yield when self is less than stop" do
1.step(5, -1, &@prc)
ScratchPad.recorded.should == []
end
end
describe "Numeric#step with [stop, step]" do
it "yields only Floats when self is a Float" do
1.5.step(5, 1) { |x| x.should be_kind_of(Float) }
end
it "yields only Floats when stop is a Float" do
1.step(5.0, 1) { |x| x.should be_kind_of(Float) }
end
it "yields only Floats when step is a Float" do
1.step(5, 1.0) { |x| x.should be_kind_of(Float) }
end
end
describe "Numeric#step with [stop, +step] when self, stop or step is a Float" do
it "yields while increasing self by step while < stop" do
1.5.step(5, 1, &@prc)
ScratchPad.recorded.should == [1.5, 2.5, 3.5, 4.5]
end
it "yields once when self equals stop" do
1.5.step(1.5, 1, &@prc)
ScratchPad.recorded.should == [1.5]
end
it "does not yield when self is greater than stop" do
2.5.step(1.5, 1, &@prc)
ScratchPad.recorded.should == []
end
ruby_bug "redmine #4576", "1.9.3" do
it "is careful about not yielding a value greater than limit" do
# As 9*1.3+1.0 == 12.700000000000001 > 12.7, we test:
1.0.step(12.7, 1.3, &@prc)
ScratchPad.recorded.should eql [1.0, 2.3, 3.6, 4.9, 6.2, 7.5, 8.8, 10.1, 11.4, 12.7]
end
end
end
describe "Numeric#step with [stop, -step] when self, stop or step is a Float" do
it "yields while decreasing self by step while self > stop" do
5.step(1.5, -1, &@prc)
ScratchPad.recorded.should == [5.0, 4.0, 3.0, 2.0]
end
it "yields once when self equals stop" do
1.5.step(1.5, -1, &@prc)
ScratchPad.recorded.should == [1.5]
end
it "does not yield when self is less than stop" do
1.step(5, -1.5, &@prc)
ScratchPad.recorded.should == []
end
ruby_bug "redmine #4576", "1.9.3" do
it "is careful about not yielding a value smaller than limit" do
# As -9*1.3-1.0 == -12.700000000000001 < -12.7, we test:
-1.0.step(-12.7, -1.3, &@prc)
ScratchPad.recorded.should eql [-1.0, -2.3, -3.6, -4.9, -6.2, -7.5, -8.8, -10.1, -11.4, -12.7]
end
end
end
describe "Numeric#step with [stop, +Infinity]" do
ruby_bug "#781", "1.8.7" do
it "yields once if self < stop" do
42.step(100, infinity_value, &@prc)
ScratchPad.recorded.should == [42]
end
it "yields once when stop is Infinity" do
42.step(infinity_value, infinity_value, &@prc)
ScratchPad.recorded.should == [42]
end
it "yields once when self equals stop" do
42.step(42, infinity_value, &@prc)
ScratchPad.recorded.should == [42]
end
it "yields once when self and stop are Infinity" do
(infinity_value).step(infinity_value, infinity_value, &@prc)
ScratchPad.recorded.should == [infinity_value]
end
end
ruby_bug "#3945", "1.9.2.135" do
it "does not yield when self > stop" do
100.step(42, infinity_value, &@prc)
ScratchPad.recorded.should == []
end
it "does not yield when stop is -Infinity" do
42.step(-infinity_value, infinity_value, &@prc)
ScratchPad.recorded.should == []
end
end
end
describe "Numeric#step with [stop, -infinity]" do
ruby_bug "#3945", "1.9.2.135" do
it "yields once if self > stop" do
42.step(6, -infinity_value, &@prc)
ScratchPad.recorded.should == [42]
end
it "yields once if stop is -Infinity" do
42.step(-infinity_value, -infinity_value, &@prc)
ScratchPad.recorded.should == [42]
end
it "yields once when self equals stop" do
42.step(42, -infinity_value, &@prc)
ScratchPad.recorded.should == [42]
end
it "yields once when self and stop are Infinity" do
(infinity_value).step(infinity_value, -infinity_value, &@prc)
ScratchPad.recorded.should == [infinity_value]
end
end
ruby_bug "#781", "1.8.7" do
it "does not yield when self > stop" do
42.step(100, -infinity_value, &@prc)
ScratchPad.recorded.should == []
end
it "does not yield when stop is Infinity" do
42.step(infinity_value, -infinity_value, &@prc)
ScratchPad.recorded.should == []
end
end
end
it "does not rescue ArgumentError exceptions" do
lambda { 1.step(2) { raise ArgumentError, "" }}.should raise_error(ArgumentError)
end
it "does not rescue TypeError exceptions" do
lambda { 1.step(2) { raise TypeError, "" } }.should raise_error(TypeError)
end
end
|
