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
|
require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe 'Comparable#clamp' do
it 'raises an Argument error unless the 2 parameters are correctly ordered' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(3)
-> { c.clamp(two, one) }.should raise_error(ArgumentError)
one.should_receive(:<=>).any_number_of_times.and_return(nil)
-> { c.clamp(one, two) }.should raise_error(ArgumentError)
end
it 'returns self if within the given parameters' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
three = ComparableSpecs::WithOnlyCompareDefined.new(3)
c = ComparableSpecs::Weird.new(2)
c.clamp(one, two).should equal(c)
c.clamp(two, two).should equal(c)
c.clamp(one, three).should equal(c)
c.clamp(two, three).should equal(c)
end
it 'returns the min parameter if less than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(0)
c.clamp(one, two).should equal(one)
end
it 'returns the max parameter if greater than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(3)
c.clamp(one, two).should equal(two)
end
context 'max is nil' do
it 'returns min if less than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
c = ComparableSpecs::Weird.new(0)
c.clamp(one, nil).should equal(one)
end
it 'always returns self if greater than min' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
c = ComparableSpecs::Weird.new(2)
c.clamp(one, nil).should equal(c)
end
end
context 'min is nil' do
it 'returns max if greater than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
c = ComparableSpecs::Weird.new(2)
c.clamp(nil, one).should equal(one)
end
it 'always returns self if less than max' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
c = ComparableSpecs::Weird.new(0)
c.clamp(nil, one).should equal(c)
end
end
it 'always returns self when min is nil and max is nil' do
c = ComparableSpecs::Weird.new(1)
c.clamp(nil, nil).should equal(c)
end
it 'returns self if within the given range parameters' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
three = ComparableSpecs::WithOnlyCompareDefined.new(3)
c = ComparableSpecs::Weird.new(2)
c.clamp(one..two).should equal(c)
c.clamp(two..two).should equal(c)
c.clamp(one..three).should equal(c)
c.clamp(two..three).should equal(c)
end
it 'returns the minimum value of the range parameters if less than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(0)
c.clamp(one..two).should equal(one)
end
it 'returns the maximum value of the range parameters if greater than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(3)
c.clamp(one..two).should equal(two)
end
it 'raises an Argument error if the range parameter is exclusive' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(3)
-> { c.clamp(one...two) }.should raise_error(ArgumentError)
end
context 'with nil as the max argument' do
it 'returns min argument if less than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
zero = ComparableSpecs::WithOnlyCompareDefined.new(0)
c = ComparableSpecs::Weird.new(0)
c.clamp(one, nil).should equal(one)
c.clamp(zero, nil).should equal(c)
end
it 'always returns self if greater than min argument' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(2)
c.clamp(one, nil).should equal(c)
c.clamp(two, nil).should equal(c)
end
end
context 'with endless range' do
it 'returns minimum value of the range parameters if less than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
zero = ComparableSpecs::WithOnlyCompareDefined.new(0)
c = ComparableSpecs::Weird.new(0)
c.clamp(one..).should equal(one)
c.clamp(zero..).should equal(c)
end
it 'always returns self if greater than minimum value of the range parameters' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(2)
c.clamp(one..).should equal(c)
c.clamp(two..).should equal(c)
end
it 'works with exclusive range' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
c = ComparableSpecs::Weird.new(2)
c.clamp(one...).should equal(c)
end
end
context 'with nil as the min argument' do
it 'returns max argument if greater than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
c = ComparableSpecs::Weird.new(2)
c.clamp(nil, one).should equal(one)
end
it 'always returns self if less than max argument' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
zero = ComparableSpecs::WithOnlyCompareDefined.new(0)
c = ComparableSpecs::Weird.new(0)
c.clamp(nil, one).should equal(c)
c.clamp(nil, zero).should equal(c)
end
end
context 'with beginless range' do
it 'returns maximum value of the range parameters if greater than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
c = ComparableSpecs::Weird.new(2)
c.clamp(..one).should equal(one)
end
it 'always returns self if less than maximum value of the range parameters' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
zero = ComparableSpecs::WithOnlyCompareDefined.new(0)
c = ComparableSpecs::Weird.new(0)
c.clamp(..one).should equal(c)
c.clamp(..zero).should equal(c)
end
it 'raises an Argument error if the range parameter is exclusive' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
c = ComparableSpecs::Weird.new(0)
-> { c.clamp(...one) }.should raise_error(ArgumentError)
end
end
context 'with nil as the min and the max argument' do
it 'always returns self' do
c = ComparableSpecs::Weird.new(1)
c.clamp(nil, nil).should equal(c)
end
end
context 'with beginless-and-endless range' do
it 'always returns self' do
c = ComparableSpecs::Weird.new(1)
c.clamp(nil..nil).should equal(c)
end
it 'works with exclusive range' do
c = ComparableSpecs::Weird.new(2)
c.clamp(nil...nil).should equal(c)
end
end
end
|
