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module RSpec
module Mocks
UnsupportedMatcherError = Class.new(StandardError)
NegationUnsupportedError = Class.new(StandardError)
class TargetBase
def initialize(target)
@target = target
end
def self.delegate_to(matcher_method, options = {})
method_name = options.fetch(:from) { :to }
class_eval(<<-RUBY)
def #{method_name}(matcher, &block)
unless Matchers::Receive === matcher
raise UnsupportedMatcherError, "only the `receive` matcher is supported " +
"with `\#{expression}(...).\#{#{method_name.inspect}}`, but you have provided: \#{matcher}"
end
matcher.__send__(#{matcher_method.inspect}, @target, &block)
end
RUBY
end
def self.disallow_negation(method)
define_method method do |*args|
raise NegationUnsupportedError,
"`#{expression}(...).#{method} receive` is not supported since it " +
"doesn't really make sense. What would it even mean?"
end
end
private
def expression
self.class::EXPRESSION
end
end
class AllowanceTarget < TargetBase
EXPRESSION = :allow
delegate_to :setup_allowance
disallow_negation :not_to
disallow_negation :to_not
end
class ExpectationTarget < TargetBase
EXPRESSION = :expect
delegate_to :setup_expectation
delegate_to :setup_negative_expectation, :from => :not_to
delegate_to :setup_negative_expectation, :from => :to_not
end
class AnyInstanceAllowanceTarget < TargetBase
EXPRESSION = :expect_any_instance_of
delegate_to :setup_any_instance_allowance
disallow_negation :not_to
disallow_negation :to_not
end
class AnyInstanceExpectationTarget < TargetBase
EXPRESSION = :expect_any_instance_of
delegate_to :setup_any_instance_expectation
delegate_to :setup_any_instance_negative_expectation, :from => :not_to
delegate_to :setup_any_instance_negative_expectation, :from => :to_not
end
end
end
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