Rspec::Tabular

Rspec extension for writing tabular examples

Installation

Add this line to your application's Gemfile:

gem 'rspec-tabular'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rspec-tabular

Usage

Here is an overall example using the rspec, followed by some more details of the specified scenarios:

The input values which are specified are exposed as let values, so they can be used in both the subject inputs or in stub/double expectations specified in a before block.

describe '#thing' do
  subject { subject.thing(input1, input2) }
  before ( stub_model(ThingyModel, name: input3) }

  let(:expected_value) { :expected_value }

  inputs            :input1,  :input2,  :input3
  it_with           'value1', 'value2', 'value3',  nil
  it_with           'value4', 'value5', 'value6',  true
  it_with           'value7', 'value8', 'value9',  'foobar'
  specify_with      'value1', 'value2', 'value3',  'foobar'
  it_with(          'value1', 'value2', 'value3' ) { is_expected.to eq(expected_value) }
  specify_with(     'value1', 'value2', 'value3' ) { expect(subject).to eq(expected_value) }

  its_with :method, 'value1', 'value2', 'value3',  'something'

  raise_error_with  'bad1',   'bad2',   'bad3',    'error'
  raise_error_with  'bad4',   'bad5',   'bad6',    TestException
  raise_error_with  'bad4',   'bad5',   'bad6',    TestException, 'error'

  side_effects_with 'value4', 'value5', 'value6'

specify_with is an alias to it_with, therefore they both have the same behaviour.

Please remember inputs or expected result values MUST be literal values, and cannot be values memoized with let, because the let values are not evaluated soon enough. You can use let values in the expectations if they are specified in a block. (e.g., { is_expected.to eq(expected_value) })

Equivalencies

Each of the tabular statements has an equivlanet non-tabular example to which is corresponds.

it_with           'value1', 'value2', 'value3', nil

# Equivalent to:
context do
  let(:input1) { 'value1' }
  let(:input2) { 'value2' }
  let(:input3) { 'value3' }

  it { expected.to be_nil }
end

it_with(          'value1', 'value2', 'value3' ) { is_expected.to eq(expected_value) }

# Equivalent to:
context do
  let(:input1) { 'value1' }
  let(:input2) { 'value2' }
  let(:input3) { 'value3' }

  it { is_expected.to eq('expected') } }
end

raise_error_with  'bad4',   'bad5',   'bad6',    TestException, 'error'

# Equivalent to:
context do
  let(:input1) { 'bad4' }
  let(:input2) { 'bad5' }
  let(:input3) { 'bad6' }

  specify { expect { subject }.to raise_error(TestException, 'error') }
end

side_effects_with 'value4', 'value5', 'value6'

# Equivalent to:
context do
  let(:input1) { 'value4' }
  let(:input2) { 'value5' }
  let(:input3) { 'value6' }

  specify { subject } }
end

Development

After checking out the repo, run bin/setup to install dependencies. Then, run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release to create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Rspec::Tabular

Installation

Usage

Equivalencies

Development

Elsewhere on the web

Contributing

License