Why the file "mock_test.go" is special to in getting the caller info?

[stretchr]

Why the file "mock_test.go" is special to in getting the caller info?

[tylerstillwater]

We use the assert package to run tests in mock.go. This loop is stepping up the stack to find the location of the call that failed. We have to explicitly tell it to step past the assert, mock, and require directories because they are at the top of the stack. However, we want it to return the location of the failed line in mock_test.go, which is in the mock directory, so we explicitly tell it to look for that test file.

[hhkbp2]

Thanks for the explanation.

When using assert/mock/require to write helper function for testing, it's useful to print out the caller stack which starts from the TestXXX function(which invokes the helper function) up to the assert/mock/require fail line(inside the helper function). For example, assure this function f() is a helper function for code reusage in test file xxx_test.go:

51 func f(t *testing.T) {
52    assert.True(t, false)
53 }

and in the test function it is called like:

100 func TestExample(t *testing.T) {
101     f(t)
....
105     f(t)
106 }

It's good to print out the caller stack when it fails:

        Location:         xxx_test.go:105
                          xxx_test.go:52
        Error:            ...

So I make a fork of the repository and add it for assert. The modification is here:

https://github.com/hhkbp2/testify/commit/78ef339d277a2ad71b39b2f74312949260681a82

I'm not sure whether there is someone else who wants this feature. If it is welcome I could do a pull request to merge it back to the main repo.

[tylerstillwater]

I see. So you've made it possible to print out more of the stack than just the top entry. I like that a lot. It also seems not to change existing behavior. Even better! Make a PR and we'll review the changes, then merge it.

[hhkbp2]

I'm glad that you like it. The PR is made.