free_mutant/spec/unit/mutant/cli_spec.rb

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RSpec.shared_examples_for 'an invalid cli run' do
it 'raises error' do
expect do
subject
end.to raise_error(Mutant::CLI::Error, expected_message)
end
end
RSpec.shared_examples_for 'a cli parser' do
it { expect(subject.config.integration).to eql(expected_integration) }
it { expect(subject.config.reporter).to eql(expected_reporter) }
it { expect(subject.config.matcher_config).to eql(expected_matcher_config) }
end
RSpec.describe Mutant::CLI do
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let(:object) { described_class }
describe '.run' do
subject { object.run(arguments) }
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let(:arguments) { double('arguments') }
let(:report) { double('Report', success?: report_success) }
let(:config) { double('Config') }
let(:env) { double('env') }
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before do
expect(Mutant::CLI).to receive(:call).with(arguments).and_return(config)
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expect(Mutant::Env).to receive(:new).with(config).and_return(env)
expect(Mutant::Runner).to receive(:call).with(env).and_return(report)
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end
context 'when report signals success' do
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let(:report_success) { true }
it 'exits failure' do
expect(subject).to be(0)
end
end
context 'when report signals error' do
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let(:report_success) { false }
it 'exits failure' do
expect(subject).to be(1)
end
end
context 'when execution raises an Mutant::CLI::Error' do
let(:exception) { Mutant::CLI::Error.new('test-error') }
let(:report_success) { nil }
before do
expect(report).to receive(:success?).and_raise(exception)
end
it 'exits failure' do
expect($stderr).to receive(:puts).with('test-error')
expect(subject).to be(1)
end
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end
end
describe '.new' do
let(:object) { described_class }
subject { object.new(arguments) }
# Defaults
let(:expected_filter) { Morpher.evaluator(s(:true)) }
let(:expected_integration) { Mutant::Integration::Null.new }
let(:expected_reporter) { Mutant::Config::DEFAULT.reporter }
let(:expected_matcher_config) { default_matcher_config }
let(:default_matcher_config) do
Mutant::Matcher::Config::DEFAULT
.update(match_expressions: expressions.map(&Mutant::Expression.method(:parse)))
end
let(:flags) { [] }
let(:expressions) { %w[TestApp*] }
let(:arguments) { flags + expressions }
context 'with unknown flag' do
let(:flags) { %w[--invalid] }
let(:expected_message) { 'invalid option: --invalid' }
it_should_behave_like 'an invalid cli run'
end
context 'with unknown option' do
let(:flags) { %w[--invalid Foo] }
let(:expected_message) { 'invalid option: --invalid' }
it_should_behave_like 'an invalid cli run'
end
context 'without expressions' do
let(:expressions) { [] }
let(:expected_message) { 'No expressions given' }
it_should_behave_like 'an invalid cli run'
end
context 'with code filter and missing argument' do
let(:arguments) { %w[--code] }
let(:expected_message) { 'missing argument: --code' }
it_should_behave_like 'an invalid cli run'
end
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context 'with include help flag' do
let(:flags) { %w[--help] }
before do
expect($stdout).to receive(:puts).with(expected_message)
expect(Kernel).to receive(:exit).with(0)
end
it_should_behave_like 'a cli parser'
let(:expected_message) do
strip_indent(<<-MESSAGE)
usage: mutant [options] MATCH_EXPRESSION ...
Environment:
--zombie Run mutant zombified
-I, --include DIRECTORY Add DIRECTORY to $LOAD_PATH
-r, --require NAME Require file with NAME
-j, --jobs NUMBER Number of kill jobs. Defaults to number of processors.
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Options:
--score COVERAGE Fail unless COVERAGE is not reached exactly
--use STRATEGY Use STRATEGY for killing mutations
--ignore-subject PATTERN Ignore subjects that match PATTERN
--code CODE Scope execution to subjects with CODE
--fail-fast Fail fast
--version Print mutants version
-d, --debug Enable debugging output
-h, --help Show this message
MESSAGE
end
end
context 'with include flag' do
let(:flags) { %w[--include foo] }
it_should_behave_like 'a cli parser'
it 'configures includes' do
expect(subject.config.includes).to eql(%w[foo])
end
end
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context 'with use flag' do
context 'when integration exists' do
let(:flags) { %w[--use rspec] }
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it_should_behave_like 'a cli parser'
let(:expected_integration) { Mutant::Integration::Rspec.new }
end
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context 'when integration does NOT exist' do
let(:flags) { %w[--use other] }
it 'raises error' do
expect { subject }.to raise_error(
Mutant::CLI::Error,
'Could not load integration "other" (you may want to try installing the gem mutant-other)'
)
end
end
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end
context 'with version flag' do
let(:flags) { %w[--version] }
before do
expect(Kernel).to receive(:exit).with(0)
expect($stdout).to receive(:puts).with("mutant-#{Mutant::VERSION}")
end
it_should_behave_like 'a cli parser'
end
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context 'with jobs flag' do
let(:flags) { %w[--jobs 0] }
it_should_behave_like 'a cli parser'
it 'configures expected coverage' do
expect(subject.config.jobs).to eql(0)
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end
end
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context 'with score flag' do
let(:flags) { %w[--score 99.5] }
it_should_behave_like 'a cli parser'
it 'configures expected coverage' do
expect(subject.config.expected_coverage).to eql(99.5)
end
end
context 'with require flag' do
let(:flags) { %w[--require foo] }
it_should_behave_like 'a cli parser'
it 'configures requires' do
expect(subject.config.requires).to eql(%w[foo])
end
end
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context 'with subject-ignore flag' do
let(:flags) { %w[--ignore-subject Foo::Bar] }
let(:expected_matcher_config) do
default_matcher_config.update(subject_ignores: [Mutant::Expression.parse('Foo::Bar')])
end
it_should_behave_like 'a cli parser'
end
context 'with fail-fast flag' do
let(:flags) { %w[--fail-fast] }
it_should_behave_like 'a cli parser'
it 'sets the fail fast option' do
expect(subject.config.fail_fast).to be(true)
end
end
context 'with debug flag' do
let(:flags) { %w[--debug] }
it_should_behave_like 'a cli parser'
it 'sets the debug option' do
expect(subject.config.debug).to be(true)
end
end
context 'with zombie flag' do
let(:flags) { %w[--zombie] }
it_should_behave_like 'a cli parser'
it 'sets the zombie option' do
expect(subject.config.zombie).to be(true)
end
end
context 'with subject code filter' do
let(:flags) { %w[--code faa --code bbb] }
let(:expected_matcher_config) do
default_matcher_config.update(subject_selects: [[:code, 'faa'], [:code, 'bbb']])
end
it_should_behave_like 'a cli parser'
end
end
end