Function TestReexecGuardOverridesPreexistingValue

cmd/codehamr/main_test.go:41–47

TestReexecGuardOverridesPreexistingValue pins the loop-guard env semantics maybeSelfUpdate relies on: the re-exec'd child must see CODEHAMR_NO_UPDATE_CHECK=="1" even when a user already exported a different value. os.Setenv (the fix) overwrites in place; the old append(os.Environ(),…) left the stale

(t *testing.T)

// first, which Unix execve resolves first, defeating the guard; update.Check
// short-circuits only on exactly "1".
func TestReexecGuardOverridesPreexistingValue(t *testing.T) {
	t.Setenv("CODEHAMR_NO_UPDATE_CHECK", "0") // user set it wrong; restored after test
	var got []string
	for _, kv := range reexecEnv() {
		if strings.HasPrefix(kv, "CODEHAMR_NO_UPDATE_CHECK=") {
			got = append(got, kv)
		}
	}
	if len(got) != 1 || got[0] != "CODEHAMR_NO_UPDATE_CHECK=1" {
		t.Fatalf("re-exec env must carry exactly one guard entry set to 1, got %v", got)