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
|
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
require File.expand_path('../shared/enumerable_enumeratorized', __FILE__)
describe "Enumerable#find_index" do
before :each do
@elements = [2, 4, 6, 8, 10]
@numerous = EnumerableSpecs::Numerous.new(*@elements)
@yieldsmixed = EnumerableSpecs::YieldsMixed2.new
end
it "passes each entry in enum to block while block when block is false" do
visited_elements = []
@numerous.find_index do |element|
visited_elements << element
false
end
visited_elements.should == @elements
end
it "returns nil when the block is false" do
@numerous.find_index {|e| false }.should == nil
end
it "returns the first index for which the block is not false" do
@elements.each_with_index do |element, index|
@numerous.find_index {|e| e > element - 1 }.should == index
end
end
it "returns the first index found" do
repeated = [10, 11, 11, 13, 11, 13, 10, 10, 13, 11]
numerous_repeat = EnumerableSpecs::Numerous.new(*repeated)
repeated.each do |element|
numerous_repeat.find_index(element).should == element - 10
end
end
it "returns nil when the element not found" do
@numerous.find_index(-1).should == nil
end
it "ignores the block if an argument is given" do
-> {
@numerous.find_index(-1) {|e| true }.should == nil
}.should complain(/given block not used/)
end
it "returns an Enumerator if no block given" do
@numerous.find_index.should be_an_instance_of(Enumerator)
end
it "uses #== for testing equality" do
[2].to_enum.find_index(2.0).should == 0
[2.0].to_enum.find_index(2).should == 0
end
describe "without block" do
it "gathers whole arrays as elements when each yields multiple" do
@yieldsmixed.find_index([0, 1, 2]).should == 3
end
end
describe "with block" do
before :each do
ScratchPad.record []
end
after :each do
ScratchPad.clear
end
describe "given a single yield parameter" do
it "passes first element to the parameter" do
@yieldsmixed.find_index {|a| ScratchPad << a; false }
ScratchPad.recorded.should == EnumerableSpecs::YieldsMixed2.first_yields
end
end
describe "given a greedy yield parameter" do
it "passes a gathered array to the parameter" do
@yieldsmixed.find_index {|*args| ScratchPad << args; false }
ScratchPad.recorded.should == EnumerableSpecs::YieldsMixed2.greedy_yields
end
end
end
it_behaves_like :enumerable_enumeratorized_with_unknown_size, :find_index
end
|
