method

assert_raises

rails latest stable - Class: ActiveSupport::Testing::Assertions

assert_raises(*exp, match: nil, &block)

public

Asserts that a block raises one of exp. This is an enhancement of the standard Minitest assertion method with the ability to test error messages.

assert_raises(ArgumentError, match: /incorrect param/i) do
  perform_service(param: 'exception')
end

# File activesupport/lib/active_support/testing/assertions.rb, line 34
      def assert_raises(*exp, match: nil, &block)
        error = super(*exp, &block)
        assert_match(match, error.message) if match
        error
      end

assert_raises

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