free_mutant/spec/unit/mutant/expression_spec.rb
Markus Schirp 2ce02af8aa Fix style
2014-12-22 01:32:51 +00:00

67 lines
1.5 KiB
Ruby

RSpec.describe Mutant::Expression do
let(:object) { described_class }
describe '.try_parse' do
subject { object.try_parse(input) }
context 'on nonsense' do
let(:input) { 'foo bar' }
it { should be(nil) }
end
context 'on a valid expression' do
let(:input) { 'Foo' }
it { should eql(Mutant::Expression::Namespace::Exact.new('Foo')) }
end
context 'on ambiguous expression' do
class ExpressionA < Mutant::Expression
register(/\Atest-syntax\z/)
end
class ExpressionB < Mutant::Expression
register(/^test-syntax$/)
end
let(:input) { 'test-syntax' }
it 'raises an exception' do
expect { subject }.to raise_error(
Mutant::Expression::AmbiguousExpressionError,
'Ambiguous expression: "test-syntax"'
)
end
end
end
describe '#inspect' do
let(:object) { described_class.parse('Foo') }
subject { object.inspect }
it { should eql('<Mutant::Expression: Foo>') }
it_should_behave_like 'an idempotent method'
end
describe '.parse' do
subject { object.parse(input) }
context 'on nonsense' do
let(:input) { 'foo bar' }
it 'raises an exception' do
expect { subject }.to raise_error(
Mutant::Expression::InvalidExpressionError,
'Expression: "foo bar" is not valid'
)
end
end
context 'on a valid expression' do
let(:input) { 'Foo' }
it { should eql(Mutant::Expression::Namespace::Exact.new('Foo')) }
end
end
end