package cmd

import (
	"strings"
	"testing"
)

func TestEnvOr(t *testing.T) {
	t.Setenv("X_TEST", "")
	if got := envOr("X_TEST", "fallback"); got != "fallback" {
		t.Fatalf("unexpected: %q", got)
	}
	t.Setenv("X_TEST", "value")
	if got := envOr("X_TEST", "fallback"); got != "value" {
		t.Fatalf("unexpected: %q", got)
	}
}

func TestExecute_Help(t *testing.T) {
	out := captureStdout(t, func() {
		_ = captureStderr(t, func() {
			if err := Execute([]string{"--help"}); err != nil {
				t.Fatalf("Execute: %v", err)
			}
		})
	})
	if !strings.Contains(out, "Google CLI") && !strings.Contains(out, "Usage:") {
		t.Fatalf("unexpected help output: %q", out)
	}
}

func TestExecute_UnknownCommand(t *testing.T) {
	errText := captureStderr(t, func() {
		_ = captureStdout(t, func() {
			if err := Execute([]string{"no_such_cmd"}); err == nil {
				t.Fatalf("expected error")
			}
		})
	})
	if errText == "" {
		t.Fatalf("expected stderr output")
	}
}

func TestExecute_UnknownFlag(t *testing.T) {
	errText := captureStderr(t, func() {
		_ = captureStdout(t, func() {
			if err := Execute([]string{"--definitely-nope"}); err == nil {
				t.Fatalf("expected error")
			}
		})
	})
	if errText == "" {
		t.Fatalf("expected stderr output")
	}
}