How to see stack trace of test code of Go program?

Question

I use Go's native test facility ( go test ) to write a test. But when the test fails due to a bug in test code, I really can't debug it due to lack of stack trace or any other contextual informations.

And even, the test code needs one contextual object t , so it is not simple work running the test code in normal mode.

What is the best practice to debug test code?

Answer 1

You can use t.Log() to log information about the test case -- go will show that output if the test case fails or if you run go test -v

You can also assert certain state within the test using panics -- if a test panics, you will see the trace in your console.

Answer 2

I don't know if you'd want to check in code with this in it, but for one-off debugging, PrintStack might help. http://golang.org/pkg/runtime/debug/#PrintStack

Answer 3

You can log stack trace this way

t.Log(string(debug.Stack()))

Documentation is here https://golang.org/pkg/runtime/debug/#Stack

It is better than PrintStack because it doesn't interfere with regular test logs.