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gobco panic with Kubernetes integration tests (TestMain handling) #38

Description

@zyue110026

Hi,

I’m trying to use gobco to measure branch coverage for Kubernetes integration tests, specifically under:

kubernetes repo
Path: test/integration/apimachinery

Issue

When running gobco on these integration tests, I encounter the following panic:

panic: can only handle TestMain with explicit call to os.Exit

Context

Kubernetes integration tests frequently define a custom TestMain(m *testing.M) for environment setup/teardown (e.g., API server initialization), and not all of them explicitly call os.Exit(m.Run()).

It appears that gobco expects TestMain to strictly follow this pattern:

func TestMain(m *testing.M) {
    os.Exit(m.Run())
}

However, many real-world integration tests (including Kubernetes) use more complex logic, such as:

func TestMain(m *testing.M) {
    framework.EtcdMain(m.Run)
}

or in some cases, omit the explicit os.Exit call entirely.

Question:
Does gobco currently only support unit tests or simple TestMain patterns?

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