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module RSpec module Expectations # Wraps the target of an expectation. # @example # expect(something) # => ExpectationTarget wrapping something # # # used with `to` # expect(actual).to eq(3) # # # with `to_not` # expect(actual).to_not eq(3) class ExpectationTarget # @api private def initialize(target) @target = target end # Runs the given expectation, passing if `matcher` returns true. # @example # expect(value).to eq(5) # expect { perform }.to raise_error # @param [Matcher] # matcher # @param [String] message optional message to display when the expectation fails # @return [Boolean] true if the expectation succeeds (else raises) # @see RSpec::Matchers def to(matcher=nil, message=nil, &block) prevent_operator_matchers(:to, matcher) RSpec::Expectations::PositiveExpectationHandler.handle_matcher(@target, matcher, message, &block) end # Runs the given expectation, passing if `matcher` returns false. # @example # expect(value).to_not eq(5) # expect(value).not_to eq(5) # @param [Matcher] # matcher # @param [String] message optional message to display when the expectation fails # @return [Boolean] false if the negative expectation succeeds (else raises) # @see RSpec::Matchers def to_not(matcher=nil, message=nil, &block) prevent_operator_matchers(:to_not, matcher) RSpec::Expectations::NegativeExpectationHandler.handle_matcher(@target, matcher, message, &block) end alias not_to to_not private def prevent_operator_matchers(verb, matcher) return if matcher raise ArgumentError, "The expect syntax does not support operator matchers, " + "so you must pass a matcher to `##{verb}`." end end end end
Version data entries
4 entries across 4 versions & 3 rubygems