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require 'rspec/matchers/dsl'
module RSpec
module Matchers
module BuiltIn
class BeTrue < BaseMatcher
def match(_, actual)
!!actual
end
def failure_message_for_should
"expected: true value\n got: #{actual.inspect}"
end
def failure_message_for_should_not
"expected: non-true value\n got: #{actual.inspect}"
end
end
class BeFalse < BaseMatcher
def match(_, actual)
!actual
end
def failure_message_for_should
"expected: false value\n got: #{actual.inspect}"
end
def failure_message_for_should_not
"expected: non-false value\n got: #{actual.inspect}"
end
end
class BeNil < BaseMatcher
def match(_, actual)
actual.nil?
end
def failure_message_for_should
"expected: nil\n got: #{actual.inspect}"
end
def failure_message_for_should_not
"expected: not nil\n got: nil"
end
end
module BeHelpers
private
def args_to_s
@args.empty? ? "" : parenthesize(inspected_args.join(', '))
end
def parenthesize(string)
"(#{string})"
end
def inspected_args
@args.collect{|a| a.inspect}
end
def expected_to_sentence
split_words(@expected)
end
def args_to_sentence
to_sentence(@args)
end
end
class Be < BaseMatcher
include BeHelpers
def initialize(*args, &block)
@args = args
end
def match(_, actual)
!!actual
end
def failure_message_for_should
"expected #{@actual.inspect} to evaluate to true"
end
def failure_message_for_should_not
"expected #{@actual.inspect} to evaluate to false"
end
[:==, :<, :<=, :>=, :>, :===, :=~].each do |operator|
define_method operator do |operand|
BeComparedTo.new(operand, operator)
end
end
end
class BeComparedTo < Be
def initialize(operand, operator)
@expected, @operator = operand, operator
@args = []
end
def matches?(actual)
@actual = actual
@actual.__send__ @operator, @expected
end
def failure_message_for_should
"expected: #{@operator} #{@expected.inspect}\n got: #{@operator.to_s.gsub(/./, ' ')} #{@actual.inspect}"
end
def failure_message_for_should_not
message = <<-MESSAGE
`#{negative_expectation_expression}` not only FAILED,
it is a bit confusing.
MESSAGE
raise message << ([:===,:==].include?(@operator) ?
"It might be more clearly expressed without the \"be\"?" :
"It might be more clearly expressed in the positive?")
end
def description
"be #{@operator} #{expected_to_sentence}#{args_to_sentence}"
end
def negative_expectation_expression
Expectations::Syntax.negative_expression("actual", "be #{@operator} #{@expected}")
end
end
class BePredicate < BaseMatcher
include BeHelpers
def initialize(*args, &block)
@expected = parse_expected(args.shift)
@args = args
@block = block
end
def matches?(actual)
@actual = actual
begin
return @result = actual.__send__(predicate, *@args, &@block)
rescue NameError => predicate_missing_error
"this needs to be here or rcov will not count this branch even though it's executed in a code example"
end
begin
return @result = actual.__send__(present_tense_predicate, *@args, &@block)
rescue NameError
raise predicate_missing_error
end
end
alias === matches?
def failure_message_for_should
"expected #{predicate}#{args_to_s} to return true, got #{@result.inspect}"
end
def failure_message_for_should_not
"expected #{predicate}#{args_to_s} to return false, got #{@result.inspect}"
end
def description
"#{prefix_to_sentence}#{expected_to_sentence}#{args_to_sentence}"
end
private
def predicate
"#{@expected}?".to_sym
end
def present_tense_predicate
"#{@expected}s?".to_sym
end
def parse_expected(expected)
@prefix, expected = prefix_and_expected(expected)
expected
end
def prefix_and_expected(symbol)
symbol.to_s =~ /^(be_(an?_)?)(.*)/
return $1, $3
end
def prefix_to_sentence
split_words(@prefix)
end
end
end
end
end
|
