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Contents
# frozen_string_literal: true
module RSpec
module CustomMatchers
class AddMethod < Matchers::BuiltIn::BaseMatcher
attr_reader :method
def initialize(method = nil)
@method = method
end
def to(instance = nil, &block)
AddMethodTo.new(instance, method, &block)
end
end
class AddMethodTo < Matchers::BuiltIn::BaseMatcher
attr_reader :method, :instance, :block
def initialize(instance, method, &block)
@instance = instance
@method = method
@block = block
end
def description
"Adds method #{method} to #{instance_class}"
end
def failure_message
"expected #{method} to be added to #{instance_class} but " \
"#{@initial_state ? 'it already existed' : "it didn't"}"
end
def matches?(event_proc)
@event_proc = event_proc
return false unless event_proc.is_a?(Proc)
raise_block_syntax_error if block_given?
perform_change(event_proc)
changed?
end
def supports_block_expectations?
true
end
private
def changed?
!@initial_state && @final_state
end
def perform_change(event_proc)
@initial_state = evaluated_instance.respond_to?(method)
@evaluated_instance = nil
event_proc.call
@final_state = evaluated_instance.respond_to?(method)
end
def evaluated_instance
@evaluated_instance ||= instance || block.call
end
def instance_class
@instance_class ||= evaluated_instance.class
end
def raise_block_syntax_error
raise SyntaxError, 'Block not received by the' \
'`add_method_to` matcher. ' \
'Perhaps you want to use `{ ... }` instead of do/end?'
end
end
end
end
module RSpec
module Matchers
def add_method(_method)
CustomMatchers::AddMethod.new(:index)
end
end
end
Version data entries
26 entries across 26 versions & 1 rubygems