func hashDirectories()

in testhelpers.go [101:137]
33 lines of code
8 McCabe index (conditional complexity)

func hashDirectories(t *testing.T, src, dest string) {
	var srcHash = sha1.New()
	var dstHash = sha1.New()
	t.Logf("===== Walking %s =====\n", src)
	if err := filepath.Walk(src, func(path string, info os.FileInfo, err error) error {
		if err != nil || path == src {
			return nil
		}

		t.Log(fmt.Sprint(info.Name(), " => ", info.Size()))
		io.WriteString(srcHash, fmt.Sprint(info.Name(), info.Size()))
		return nil
	}); err != nil {
		t.Fatal(err)
	}

	t.Logf("===== Walking %s =====\n", dest)
	if err := filepath.Walk(dest, func(path string, info os.FileInfo, err error) error {
		if err != nil || path == dest {
			return nil
		}

		t.Log(fmt.Sprint(info.Name(), " => ", info.Size()))
		io.WriteString(dstHash, fmt.Sprint(info.Name(), info.Size()))
		return nil
	}); err != nil {
		t.Fatal(err)
	}

	t.Log("===========================")
	var srcSum, dstSum = srcHash.Sum(nil), dstHash.Sum(nil)
	if !bytes.Equal(srcSum, dstSum) {
		t.Errorf("Contents of %s are not the same as %s", src, dest)
		t.Errorf("src folder hash: %x", srcSum)
		t.Errorf("dst folder hash: %x", dstSum)
	}
}