# File test/unit/assertions.rb, line 60
   def assert_raises(expected_exception_klass, message="")
				_wrap_assertion {
					assert_instance_of(Class, expected_exception_klass, "Should expect a type of exception")
					actual_exception = nil
					full_message = build_message(message, expected_exception_klass) {
						| arg |
						"Expected exception of type <#{arg}> but none was thrown"
					}
					assert_block(full_message) {
						thrown = false
						begin
							yield
						rescue Exception => thrown_exception
							actual_exception = thrown_exception
							thrown = true
						end
						thrown
					}
					full_message = build_message(message, expected_exception_klass, actual_exception.class.name, actual_exception.message, actual_exception.backtrace.join("\n\t")) {
						| arg1, arg2, arg3, arg4 |
						"Expected exception to be of type <#{arg1}> but was <#{arg2}: #{arg3}\n\t#{arg4}>"
					}
					assert_block(full_message) {
						expected_exception_klass == actual_exception.class
					}
					actual_exception
				}
			end