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module Shoulda
class << self
attr_accessor :expected_exceptions
end
module ClassMethods
# Enables the core shoulda test suite to test for failure scenarios. For
# example, to ensure that a set of test macros should fail, do this:
#
# should_fail do
# should_validate_presence_of :comments
# should_not_allow_mass_assignment_of :name
# end
def should_fail(&block)
context "should fail when trying to run:" do
if defined?(Test::Unit::AssertionFailedError)
failures = [Test::Unit::AssertionFailedError]
elsif defined?(MiniTest::Assertion)
failures = [MiniTest::Assertion]
end
Shoulda.expected_exceptions = failures
yield block
Shoulda.expected_exceptions = nil
end
end
end
class Context
# alias_method_chain hack to allow the should_fail macro to work
def should_with_failure_scenario(*args, &block)
should_without_failure_scenario(*args, &block)
wrap_last_should_with_failure_expectation
end
alias_method_chain :should, :failure_scenario
# alias_method_chain hack to allow the should_fail macro to work
def should_not_with_failure_scenario(*args, &block)
should_not_without_failure_scenario(*args, &block)
wrap_last_should_with_failure_expectation
end
alias_method_chain :should_not, :failure_scenario
def wrap_last_should_with_failure_expectation
if Shoulda.expected_exceptions
expected_exceptions = Shoulda.expected_exceptions
should = self.shoulds.last
assertion_block = should[:block]
failure_block = lambda do
assert_raise(*expected_exceptions, &assertion_block.bind(self))
end
should[:block] = failure_block
end
end
end
end
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