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Contents
module Kookaburra
module Assertion
# Custom exception class for assertion failures
class Failure < Exception; end
# Provides a mechanism for making assertions within your domain and window drivers
# without creating a dependency on any specific testing framework.
#
# @param [Truthy] predicate The thing you are asserting should be `true` (or at least truthy).
# @param [String] message Optional message to return if `predicate` is not `true` (or at least truthy).
# @return [nil] if `predicate` does not evaluate to `false` or `nil`
# @raise [Kookaburra::Assertion::Failure] if `predicate` evaluates to `false` or `nil`
def assert(predicate, message = nil)
return if predicate
raise Failure, message
rescue Failure => e
raise Backtrace.clean(e)
end
# @private
module Backtrace
module_function
def clean(exception)
new_backtrace = exception.backtrace.dup
new_backtrace.shift while new_backtrace.first.include?('lib/kookaburra/assertion.rb')
exception.set_backtrace(new_backtrace)
exception
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems