Allow more stdlib functions to be mocked about xgo HOT 4 CLOSED

A possible solution is to intercept at caller side.

Or we can recognize the caller, if that is not directly from main module, we skip trapping.

from xgo.

func getCacheFilePath() (string, error) {
	dir, err := os.UserCacheDir()
	if err != nil {
		return "", err
	}

	cacheDir := filepath.Join(dir, "go-size-analyzer")

	err = os.MkdirAll(cacheDir, 0755)
	if err != nil {
		return "", err
	}

	file := filepath.Join(cacheDir, fmt.Sprintf("webui-v%s.html", gsa.StaticVersion))

	return file, nil
}

As for the above code, when os.UserCacheDir, os.MkdirAll and filepath.Join is called, only these directly from main module will be trapped. Or even only allowed when xgo test is being used.

Seems this strategy is fine enough to satisfy possible use cases while prevents performance or security issues.

This will be available in the next version in 3 days.(v1.0.36, 2024-05-19)

from xgo.

Should fail with message prompting that stdlib mocking only available in test mode when attempting patching in normal code.

from xgo.

It seems that these packages cannot be mocked by nature:

syscall, reflect, sync,  sync/atomic, testing, unsafe

from xgo.