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