36 lines
760 B
Ruby
36 lines
760 B
Ruby
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require 'spec_helper'
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describe 'singleton null object' do
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subject(:null_class) do
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Naught.build do |b|
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b.singleton
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end
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end
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it 'does not respond to .new' do
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expect { null_class.new }.to raise_error
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end
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it 'has only one instance' do
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null1 = null_class.instance
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null2 = null_class.instance
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expect(null1).to be(null2)
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end
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it 'can be cloned' do
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null = null_class.instance
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expect(null.clone).to be(null)
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end
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it 'can be duplicated' do
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null = null_class.instance
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expect(null.dup).to be(null)
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end
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it 'aliases .instance to .get' do
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expect(null_class.get).to be null_class.instance
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end
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it 'permits arbitrary arguments to be passed to .get' do
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null_class.get(42, :foo => 'bar')
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end
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end
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