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38 lines
1 KiB
Ruby
38 lines
1 KiB
Ruby
require_relative '../../spec_helper'
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describe "Queue#initialize" do
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it "can be passed no arguments for an empty Queue" do
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q = Queue.new
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q.size.should == 0
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q.should.empty?
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end
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ruby_version_is '3.1' do
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it "adds all elements of the passed Enumerable to self" do
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q = Queue.new([1, 2, 3])
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q.size.should == 3
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q.should_not.empty?
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q.pop.should == 1
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q.pop.should == 2
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q.pop.should == 3
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q.should.empty?
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end
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it "uses #to_a on the provided Enumerable" do
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enumerable = MockObject.new('mock-enumerable')
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enumerable.should_receive(:to_a).and_return([1, 2, 3])
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q = Queue.new(enumerable)
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q.size.should == 3
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q.should_not.empty?
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q.pop.should == 1
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q.pop.should == 2
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q.pop.should == 3
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q.should.empty?
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end
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it "raises if the provided Enumerable does not respond to #to_a" do
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enumerable = MockObject.new('mock-enumerable')
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-> { Queue.new(enumerable) }.should raise_error(TypeError, "can't convert MockObject into Array")
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end
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end
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end
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