jeudi 23 juillet 2015

Golang - how to test panics?

I'm currently pondering how to write tests that check if a given piece of code panicked? I know that Go uses recover to catch panics, but unlike say, Java code, you can't really specify what code should be skipped in case of a panic or what have you. So if I have a function:

func f(t *testing.T) {
    defer func() {
        if r := recover(); r != nil {
            fmt.Println("Recovered in f", r)
        }
    }()
    OtherFunctionThatPanics()
    t.Errorf("The code did not panic")
}

I can't really tell whether OtherFunctionThatPanics panicked and we recovered, or if the function did not panic at all. How do I specify which code to skip over if there is no panic and which code to execute if there is a panic? How can I check whether there was some panic we recovered from?

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