module Minitest::Spec::DSL

Oh look! A Minitest::Spec::DSL module! Eat your heart out DHH.

Constants

TYPES

Contains pairs of matchers and Spec classes to be used to calculate the superclass of a top-level describe. This allows for automatically customizable spec types.

See: register_spec_type and spec_type

Public Instance Methods

after(_type = nil, &block) click to toggle source

Define an ‘after’ action. Inherits the way normal methods should.

NOTE: type is ignored and is only there to make porting easier.

Equivalent to Minitest::Test#teardown.

Calls superclass method

# File minitest-5.16.3/lib/minitest/spec.rb, line 199
def after _type = nil, &block
  define_method :teardown do
    self.instance_eval(&block)
    super()
  end
end

before(_type = nil, &block) click to toggle source

Define a ‘before’ action. Inherits the way normal methods should.

NOTE: type is ignored and is only there to make porting easier.

Equivalent to Minitest::Test#setup.

Calls superclass method

# File minitest-5.16.3/lib/minitest/spec.rb, line 185
def before _type = nil, &block
  define_method :setup do
    super()
    self.instance_eval(&block)
  end
end

it(desc = "anonymous", &block) click to toggle source

Define an expectation with name desc. Name gets morphed to a proper test method name. For some freakish reason, people who write specs don’t like class inheritance, so this goes way out of its way to make sure that expectations aren’t inherited.

This is also aliased to specify and doesn’t require a desc arg.

Hint: If you do want inheritance, use minitest/test. You can mix and match between assertions and expectations as much as you want.

# File minitest-5.16.3/lib/minitest/spec.rb, line 217
def it desc = "anonymous", &block
  block ||= proc { skip "(no tests defined)" }

  @specs ||= 0
  @specs += 1

  name = "test_%04d_%s" % [ @specs, desc ]

  undef_klasses = self.children.reject { |c| c.public_method_defined? name }

  define_method name, &block

  undef_klasses.each do |undef_klass|
    undef_klass.send :undef_method, name
  end

  name
end

Also aliased as: specify

let(name, &block) click to toggle source

Essentially, define an accessor for name with block.

Why use let instead of def? I honestly don’t know.

# File minitest-5.16.3/lib/minitest/spec.rb, line 241
def let name, &block
  name = name.to_s
  pre, post = "let '#{name}' cannot ", ". Please use another name."
  methods = Minitest::Spec.instance_methods.map(&:to_s) - %w[subject]
  raise ArgumentError, "#{pre}begin with 'test'#{post}" if
    name =~ /\Atest/
  raise ArgumentError, "#{pre}override a method in Minitest::Spec#{post}" if
    methods.include? name

  define_method name do
    @_memoized ||= {}
    @_memoized.fetch(name) { |k| @_memoized[k] = instance_eval(&block) }
  end
end

register_spec_type(*args, &block) click to toggle source

Register a new type of spec that matches the spec’s description. This method can take either a Regexp and a spec class or a spec class and a block that takes the description and returns true if it matches.

Eg:

register_spec_type(/Controller$/, Minitest::Spec::Rails)

or:

register_spec_type(Minitest::Spec::RailsModel) do |desc|
  desc.superclass == ActiveRecord::Base
end

# File minitest-5.16.3/lib/minitest/spec.rb, line 140
def register_spec_type *args, &block
  if block then
    matcher, klass = block, args.first
  else
    matcher, klass = *args
  end
  TYPES.unshift [matcher, klass]
end

spec_type(desc, *additional) click to toggle source

Figure out the spec class to use based on a spec’s description. Eg:

spec_type("BlahController") # => Minitest::Spec::Rails

# File minitest-5.16.3/lib/minitest/spec.rb, line 154
def spec_type desc, *additional
  TYPES.find { |matcher, _klass|
    if matcher.respond_to? :call then
      matcher.call desc, *additional
    else
      matcher === desc.to_s
    end
  }.last
end

specify(desc = "anonymous", &block)

Alias for: it

subject(&block) click to toggle source

Another lazy man’s accessor generator. Made even more lazy by setting the name for you to subject.

# File minitest-5.16.3/lib/minitest/spec.rb, line 260
def subject &block
  let :subject, &block
end