Method: Test::Unit::Assertions#assert_raise

Defined in:
lib/test/unit/assertions.rb

#assert_raise(*args, &block) ⇒ Object Also known as: assert_raises

Passes if the block raises one of the expected exceptions. When an expected exception is an Exception object, passes if expected_exception == actual_exception.

Examples:

assert_raise(RuntimeError, LoadError) do
  raise 'Boom!!!'
end # -> pass

assert_raise do
  raise Exception, 'Any exception should be raised!!!'
end # -> pass

assert_raise(RuntimeError.new("XXX")) {raise "XXX"} # -> pass
assert_raise(MyError.new("XXX"))      {raise "XXX"} # -> fail
assert_raise(RuntimeError.new("ZZZ")) {raise "XXX"} # -> fail



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# File 'lib/test/unit/assertions.rb', line 264

def assert_raise(*args, &block)
  assert_expected_exception = Proc.new do |*_args|
    message, assert_exception_helper, actual_exception = _args
    expected = assert_exception_helper.expected_exceptions
    diff = AssertionMessage.delayed_diff(expected, actual_exception)
    full_message = build_message(message,
                                 "<?> exception expected but was\n<?>.?",
                                 expected, actual_exception, diff)
    begin
      assert_block(full_message) do
        expected == [] or
          assert_exception_helper.expected?(actual_exception)
      end
    rescue AssertionFailedError => failure
      _set_failed_information(failure, expected, actual_exception,
                              message)
      raise failure # For JRuby. :<
    end
  end
  _assert_raise(assert_expected_exception, *args, &block)
end