func (s *MySuite) TestAddition(c *C) { num1 := 5 num2 := 7 sum := Add(num1, num2) expectedSum := 12 if sum != expectedSum { c.Fatalf("[TEST FAILED] Expected %d, but got %d", expectedSum, sum) } }In this example, the Fatalf function is used to generate an error message if the sum of two numbers (generated using the `Add` function) is not equal to the expected sum. If the test fails, the message "Expected 12, but got