Contents

require_relative File.join 'exception', 'failure'
require_relative 'matcher'

module Expect
  # Wraps the target of an expectation.
  #
  # @api private
  #
  # @example
  #   ExpectationTarget.new { 42 }.to Equal: 42 # => true
  class ExpectationTarget
    # Create a new expection target
    #
    # @example
    #   ExpectationTarget.new { block of code }
    #
    # @yieldparam actual the value which is compared with the expected value.
    def initialize(&actual)
      @actual = actual
    end

    # Evaluate to a positive assertion.
    #
    # @api public
    #
    # @param [Hash, Symbol] definition
    #
    # @return [Boolean] pass or fail the spec
    def to(definition)
      match?(definition) || fail(Failure)
    end

    # Evaluate to a negative assertion.
    #
    # @api public
    #
    # @param [Hash, Symbol] definition
    #
    # @return [Boolean] pass or fail the spec
    def not_to(definition)
      match?(definition).equal?(false) || fail(Failure)
    end

    private

    # Boolean comparison between the actual value and the expected value.
    #
    # @api private
    #
    # @param [Hash, Symbol] definition
    #
    # @return [Boolean] report if the expectation is true or false
    def match?(definition)
      Matcher.pass?(definition, &@actual)
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
expect-0.0.9	lib/expect/expectation_target.rb