Sha256: 4a14e58df9e7e091b6426f71282e3e38e9722a686dd55c9d7aa4d1979b8a52c9
Contents?: true
Size: 722 Bytes
Versions: 20
Compression:
Stored size: 722 Bytes
Contents
# frozen_string_literal: true
RSpec.describe Mutant::Util, '.one' do
let(:first) { instance_double(Object) }
let(:array) { instance_double(Array, one?: true, first: first) }
it 'returns first element' do
expect(described_class.one(array)).to be(first)
end
it 'fails if the list is empty' do
expect { described_class.one([]) }
.to raise_error(described_class::SizeError)
.with_message('expected size to be exactly 1 but size was 0')
end
it 'fails if the list has more than one element' do
expect { described_class.one([1, 2]) }
.to raise_error(described_class::SizeError)
.with_message('expected size to be exactly 1 but size was 2')
end
end
Version data entries
20 entries across 20 versions & 1 rubygems