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
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
|
require 'rspec'
describe "Enumerable#each_with_index with Enumerable#each implemented with a call rather than a yield" do
it "passes nil to the block if each passes no args" do
no_args_each = Class.new do
include Enumerable
def each(&block)
block.call
end
end
no_args_each.new.each_with_index do |args, index|
args.should == nil
index.should == 0
end
end
it "passes the arg directly to the block if each passes one arg" do
one_arg_each = Class.new do
include Enumerable
def each(&block)
block.call("one")
end
end
one_arg_each.new.each_with_index do |args, index|
args.should == "one"
index.should == 0
end
end
it "passes an array of arguments to the block if Enumerable#each passes multiple values" do
many_args_each = Class.new do
include Enumerable
def each(&block)
block.call(0, 1, 2, 3)
end
end
many_args_each.new.each_with_index do |args, index|
args.should == [0, 1, 2, 3]
index.should == 0
end
end
end
describe "Enumerator#each_with_index for a method implemented with a call rather than a yield" do
it "passes nil to the block if the method passes no args" do
no_args_method = Class.new do
include Enumerable
def my_method(&block)
block.call
end
end
no_args_method.new.enum_for(:my_method).each_with_index do |args, index|
args.should == nil
index.should == 0
end
no_args_method.new.enum_for(:my_method).next.should == nil
end
it "passes the arg directly to the block if the method passes one arg" do
one_arg_each = Class.new do
include Enumerable
def my_method(&block)
block.call("one")
end
end
one_arg_each.new.enum_for(:my_method) do |args, index|
args.should == "one"
index.should == 0
end
one_arg_each.new.enum_for(:my_method).next.should == "one"
end
it "passes an array of arguments to the block if the method passes multiple values" do
many_args_method = Class.new do
include Enumerable
def my_method(&block)
block.call(0, 1, 2, 3)
end
end
many_args_method.new.enum_for(:my_method).each_with_index do |args, index|
args.should == [0, 1, 2, 3]
index.should == 0
end
many_args_method.new.enum_for(:my_method).next.should == [0, 1, 2, 3]
end
end
describe "Enumerables whose #each method passes multiple values to a block.call (rather than a yield)," do
before do
@test_enum = Class.new do
include Enumerable
def each(&block)
block.call 1,2,3
end
end.new
end
shared_examples "an Enumerable method which takes a block" do |arity_one_behavior|
it "passes all #each args to its block" do
@test_enum.send(subject) do |a, b, c|
a.should == 1
b.should == 2
c.should == 3
end
end
it "passes the appropriate args to blocks of arity one" do
case arity_one_behavior
when :array
@test_enum.send(subject) do |obj|
obj.should == [1, 2, 3]
end
when :first_arg
@test_enum.send(subject) do |obj|
obj.should == 1
end
else
raise 'Unknown arity_one_behavior'
end
end
end
shared_examples "an Enumerable method which returns an enum element" do
it "puts an array of all each args in the returned value" do
@test_enum.send(subject) { true }.should == [1, 2, 3]
end
end
shared_examples "an Enumerable method which returns an array" do |block_ret|
it "puts an array of all each args in the returned array" do
@test_enum.send(subject) { block_ret.nil? ? true : block_ret}.should == [[1, 2, 3]]
end
end
describe "Enumerable#to_a" do
subject { :to_a }
it_behaves_like "an Enumerable method which returns an array"
end
describe "Enumerable#sort" do
subject { :sort }
it_behaves_like "an Enumerable method which returns an array"
end
describe "Enumerable#sort_by" do
subject { :sort_by }
it_behaves_like "an Enumerable method which takes a block", :array
it_behaves_like "an Enumerable method which returns an array"
end
describe "Enumerable#select" do
subject { :select }
it_behaves_like "an Enumerable method which takes a block", :array
it_behaves_like "an Enumerable method which returns an array"
end
describe "Enumerable#parition" do
subject { :partition }
it_behaves_like "an Enumerable method which takes a block", :array
it "returns all #each args" do
@test_enum.partition { true }.should == [[[1, 2, 3]], []]
end
end
describe "Enumerable#reject" do
subject { :reject }
it_behaves_like "an Enumerable method which takes a block", :array
it_behaves_like "an Enumerable method which returns an array", false
end
describe "Enumerable#min" do
subject { :min }
it_behaves_like "an Enumerable method which takes a block", :array
it_behaves_like "an Enumerable method which returns an enum element"
end
describe "Enumerable#max" do
subject { :max }
it_behaves_like "an Enumerable method which takes a block", :array
it_behaves_like "an Enumerable method which returns an enum element"
end
describe "Enumerable#minmax" do
subject { :minmax }
it_behaves_like "an Enumerable method which takes a block", :array
it "returns all #each args" do
@test_enum.minmax.should == [[1, 2, 3], [1, 2, 3]]
end
end
describe "Enumerable#min_by" do
subject { :min_by }
it_behaves_like "an Enumerable method which takes a block", :array
it_behaves_like "an Enumerable method which returns an enum element"
end
describe "Enumerable#max_by" do
subject { :max_by }
it_behaves_like "an Enumerable method which takes a block", :array
it_behaves_like "an Enumerable method which returns an enum element"
end
describe "Enumerable#minmax_by" do
subject { :minmax_by }
it_behaves_like "an Enumerable method which takes a block", :array
it "returns all #each args" do
@test_enum.minmax_by {|o| o}.should == [[1, 2, 3], [1, 2, 3]]
end
end
describe "Enumerable#include?" do
it "tests against all #each args" do
@test_enum.include?([1, 2, 3]).should be_true
end
end
describe "Enumerable#any?" do
subject { :any? }
it_behaves_like "an Enumerable method which takes a block", RUBY_VERSION >= '1.9' ? :first_arg : :array
end
describe "Enumerable#none?" do
subject { :none? }
it_behaves_like "an Enumerable method which takes a block", RUBY_VERSION >= '1.9' ? :first_arg : :array
end
describe "Enumerable#one?" do
subject { :one? }
it_behaves_like "an Enumerable method which takes a block", RUBY_VERSION >= '1.9' ? :first_arg : :array
end
describe "Enumerable#all?" do
subject { :all? }
it_behaves_like "an Enumerable method which takes a block", RUBY_VERSION >= '1.9' ? :first_arg : :array
end
describe "Enumerable#inject" do
it "passes all each args to its block" do
@test_enum.inject(0) { |memo, obj| obj.should == [1, 2, 3] }
end
end
describe "Enumerable#group_by" do
subject { :group_by }
it_behaves_like "an Enumerable method which takes a block", :array
it "returns groups containing all #each arguments in an array" do
@test_enum.group_by { :x }.should == { :x => [[1, 2, 3]]}
end
end
describe "Enumerable#cycle" do
it "passes all #each args to its block" do
@test_enum.cycle(1) do |obj|
obj.should == [1, 2, 3]
end
end
end
describe "Enumerable#each_slice" do
it "passes all #each args to its block" do
@test_enum.each_slice(1) do |obj|
obj.should == [[1, 2, 3]]
end
end
end
describe "Enumerable#drop_while" do
subject { :drop_while }
it_behaves_like "an Enumerable method which takes a block", :array
it "returns all #each args even if its block does not use them" do
@test_enum.drop_while do |a|
false
end.should == [[1, 2, 3]]
end
end
describe "Enumerable#take_while" do
subject { :take_while }
it_behaves_like "an Enumerable method which takes a block", RUBY_VERSION >= '1.9' ? :first_arg : :array
it "returns all #each args even if its block does not use them" do
@test_enum.take_while do |a|
true
end.should == [[1, 2, 3]]
end
end
describe "Enumerable#find_index" do
subject { :find_index }
it_behaves_like "an Enumerable method which takes a block", RUBY_VERSION >= '1.9' ? :first_arg : :array
end
describe "Enumerable#detect" do
subject { :detect }
it_behaves_like "an Enumerable method which takes a block", :array
end
describe "Enumerable#grep" do
it "finds array of all #each args" do
@test_enum.grep([1, 2, 3]).should == [[1, 2, 3]]
end
end
describe "Enumerable#zip" do
it "includes all #each args in the zipped array" do
@test_enum.zip.should == [[[1, 2, 3]]]
end
end
describe "Enumerable#each_cons" do
it "puts all #each args in its block array" do
@test_enum.each_cons(1) { |obj| obj.should == [[1, 2, 3]] }
end
end
if RUBY_VERSION >= '1.9'
describe "Enumerable#each_with_object" do
it "passes all each args to its block" do
@test_enum.each_with_object([]) { |obj, memo| obj.should == [1, 2, 3] }
end
end
describe "Enumerable#each_entry" do
subject { :each_entry }
it_behaves_like "an Enumerable method which takes a block", :array
end
describe "Enumerable#slice_before" do
it "passes all #each args to its block" do
@test_enum.slice_before do |obj|
obj.should == [1, 2, 3]
end.each{}
end
end
describe "Enumerable#flat_map" do
subject { :flat_map }
it_behaves_like "an Enumerable method which takes a block", :first_arg
end
describe "Enumerable#chunk" do
it "passes all #each args to its block" do
@test_enum.chunk do |a, b, c|
a.should == 1
b.should == 2
c.should == 3
end.each {}
end
it "passes all #each args to its block" do
@test_enum.chunk do |obj|
obj.should == [1, 2, 3]
end.each{}
end
end
end
end
|
