Error handling strategies for Go function unit testing

In Go function unit testing, there are two main strategies for error handling: 1. Represent the error as a specific value of the error type, used to assert the expected value; 2. Use channels to pass errors to the test function, suitable for testing concurrency code. In a practical case, use the error value strategy to ensure that the function returns 0 for negative input.

Error handling strategy for Go function unit testing

Unit testing is an important step to ensure the robustness and reliability of the code. In Go, unit testing can be performed using the testing package, which contains several strategies for handling errors.

Error handling strategy

There are two main strategies for handling errors in Go:

1. The error value

will Represented as a concrete value of type error. To use this method in unit tests, you can assert errors to expected values:

func TestMyFunction(t *testing.T) {
    err := myFunction()
    if err != nil {
        t.Errorf("myFunction returned an unexpected error: %v", err)
    }
}

2. Error Channels

Use channels to pass errors to test functions. This is useful for testing concurrent code, since multiple errors can be observed at the same time: #Use the error value strategy for unit testing to ensure that the function returns 0 for negative input:

func TestMyConcurrentFunction(t *testing.T) {
    done := make(chan error)
    go func() { done <- myConcurrentFunction() }()
    select {
    case err := <-done:
        if err != nil {
            t.Errorf("myConcurrentFunction returned an unexpected error: %v", err)
        }
    case <-time.After(time.Second):
        t.Errorf("myConcurrentFunction did not complete within the timeout")
    }
}

The above is the detailed content of Error handling strategies for Go function unit testing. For more information, please follow other related articles on the PHP Chinese website!