35 lines
929 B
Ruby
35 lines
929 B
Ruby
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require 'spec_helper'
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describe 'Null()' do
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include ConvertableNull::Conversions
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specify 'given no input, returns a null object' do
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expect(Null().class).to be(ConvertableNull)
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end
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specify 'given nil, returns a null object' do
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expect(Null(nil).class).to be(ConvertableNull)
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end
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specify 'given a null object, returns the same null object' do
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null = ConvertableNull.get
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expect(Null(null)).to be(null)
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end
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specify 'given anything in null_equivalents, return a null object' do
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expect(Null('').class).to be(ConvertableNull)
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end
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specify 'given anything else, raises an ArgumentError' do
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expect { Null(false) }.to raise_error(ArgumentError)
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expect { Null('hello') }.to raise_error(ArgumentError)
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end
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it 'generates null objects with useful trace info' do
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null, line = Null(), __LINE__
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expect(null.__file__).to eq(__FILE__)
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expect(null.__line__).to eq(line)
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end
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end
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