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
|
require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Array#shift" do
it "removes and returns the first element" do
a = [5, 1, 1, 5, 4]
a.shift.should == 5
a.should == [1, 1, 5, 4]
a.shift.should == 1
a.should == [1, 5, 4]
a.shift.should == 1
a.should == [5, 4]
a.shift.should == 5
a.should == [4]
a.shift.should == 4
a.should == []
end
it "returns nil when the array is empty" do
[].shift.should == nil
end
it "properly handles recursive arrays" do
empty = ArraySpecs.empty_recursive_array
empty.shift.should == []
empty.should == []
array = ArraySpecs.recursive_array
array.shift.should == 1
array[0..2].should == ['two', 3.0, array]
end
it "raises a FrozenError on a frozen array" do
-> { ArraySpecs.frozen_array.shift }.should raise_error(FrozenError)
end
it "raises a FrozenError on an empty frozen array" do
-> { ArraySpecs.empty_frozen_array.shift }.should raise_error(FrozenError)
end
describe "passed a number n as an argument" do
it "removes and returns an array with the first n element of the array" do
a = [1, 2, 3, 4, 5, 6]
a.shift(0).should == []
a.should == [1, 2, 3, 4, 5, 6]
a.shift(1).should == [1]
a.should == [2, 3, 4, 5, 6]
a.shift(2).should == [2, 3]
a.should == [4, 5, 6]
a.shift(3).should == [4, 5, 6]
a.should == []
end
it "does not corrupt the array when shift without arguments is followed by shift with an argument" do
a = [1, 2, 3, 4, 5]
a.shift.should == 1
a.shift(3).should == [2, 3, 4]
a.should == [5]
end
it "returns a new empty array if there are no more elements" do
a = []
popped1 = a.shift(1)
popped1.should == []
a.should == []
popped2 = a.shift(2)
popped2.should == []
a.should == []
popped1.should_not equal(popped2)
end
it "returns whole elements if n exceeds size of the array" do
a = [1, 2, 3, 4, 5]
a.shift(6).should == [1, 2, 3, 4, 5]
a.should == []
end
it "does not return self even when it returns whole elements" do
a = [1, 2, 3, 4, 5]
a.shift(5).should_not equal(a)
a = [1, 2, 3, 4, 5]
a.shift(6).should_not equal(a)
end
it "raises an ArgumentError if n is negative" do
->{ [1, 2, 3].shift(-1) }.should raise_error(ArgumentError)
end
it "tries to convert n to an Integer using #to_int" do
a = [1, 2, 3, 4]
a.shift(2.3).should == [1, 2]
obj = mock('to_int')
obj.should_receive(:to_int).and_return(2)
a.should == [3, 4]
a.shift(obj).should == [3, 4]
a.should == []
end
it "raises a TypeError when the passed n cannot be coerced to Integer" do
->{ [1, 2].shift("cat") }.should raise_error(TypeError)
->{ [1, 2].shift(nil) }.should raise_error(TypeError)
end
it "raises an ArgumentError if more arguments are passed" do
->{ [1, 2].shift(1, 2) }.should raise_error(ArgumentError)
end
it "does not return subclass instances with Array subclass" do
ArraySpecs::MyArray[1, 2, 3].shift(2).should be_an_instance_of(Array)
end
ruby_version_is ''...'2.7' do
it "returns an untainted array even if the array is tainted" do
ary = [1, 2].taint
ary.shift(2).tainted?.should be_false
ary.shift(0).tainted?.should be_false
end
it "keeps taint status" do
a = [1, 2].taint
a.shift(2)
a.tainted?.should be_true
a.shift(2)
a.tainted?.should be_true
end
end
end
end
|
