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
|
require_relative '../../spec_helper'
describe "Queue#initialize" do
it "can be passed no arguments for an empty Queue" do
q = Queue.new
q.size.should == 0
q.should.empty?
end
it "is a private method" do
Queue.private_instance_methods.include?(:initialize).should == true
end
ruby_version_is '3.1' do
it "adds all elements of the passed Enumerable to self" do
q = Queue.new([1, 2, 3])
q.size.should == 3
q.should_not.empty?
q.pop.should == 1
q.pop.should == 2
q.pop.should == 3
q.should.empty?
end
describe "converts the given argument to an Array using #to_a" do
it "uses #to_a on the provided Enumerable" do
enumerable = MockObject.new('mock-enumerable')
enumerable.should_receive(:to_a).and_return([1, 2, 3])
q = Queue.new(enumerable)
q.size.should == 3
q.should_not.empty?
q.pop.should == 1
q.pop.should == 2
q.pop.should == 3
q.should.empty?
end
it "raises a TypeError if the given argument can't be converted to an Array" do
-> { Queue.new(42) }.should raise_error(TypeError)
-> { Queue.new(:abc) }.should raise_error(TypeError)
end
it "raises a NoMethodError if the given argument raises a NoMethodError during type coercion to an Array" do
enumerable = MockObject.new('mock-enumerable')
enumerable.should_receive(:to_a).and_raise(NoMethodError)
-> { Queue.new(enumerable) }.should raise_error(NoMethodError)
end
end
it "raises TypeError if the provided Enumerable does not respond to #to_a" do
enumerable = MockObject.new('mock-enumerable')
-> { Queue.new(enumerable) }.should raise_error(TypeError, "can't convert MockObject into Array")
end
it "raises TypeError if #to_a does not return Array" do
enumerable = MockObject.new('mock-enumerable')
enumerable.should_receive(:to_a).and_return("string")
-> { Queue.new(enumerable) }.should raise_error(TypeError, "can't convert MockObject to Array (MockObject#to_a gives String)")
end
end
end
|
