You mentioned testing with the white-box method. Was the product in Go? What tools did you use?

If the product is written in Go, the built-in testing package is usually used for white-box testing, which allows writing unit tests with access to the internals of the code.

Additionally, the following tools are used:

• go test — running tests with code coverage.
• Profilers (pprof) for performance analysis.
• Mocking with libraries such as gomock or testify/mock to isolate components.

Example of a simple white-box test in Go:

func add(a, b int) int {
    return a + b
}

func TestAdd(t *testing.T) {
    result := add(2, 3)
    if result != 5 {
        t.Errorf("Expected 5, got %d", result)
    }
}

Thus, white-box testing in Go is usually built on standard tools with the possibility of deep code analysis.