package container_test

import (
	"errors"
	"os"
	"strconv"
	"syscall"
	"testing"

	"hakurei.app/container"
)

func TestSetupReceive(t *testing.T) {
	t.Run("not set", func(t *testing.T) {
		const key = "TEST_ENV_NOT_SET"
		{
			v, ok := os.LookupEnv(key)
			t.Cleanup(func() {
				if ok {
					if err := os.Setenv(key, v); err != nil {
						t.Fatalf("Setenv: error = %v", err)
					}
				} else {
					if err := os.Unsetenv(key); err != nil {
						t.Fatalf("Unsetenv: error = %v", err)
					}
				}
			})
		}

		if _, err := container.Receive(key, nil, nil); !errors.Is(err, container.ErrReceiveEnv) {
			t.Errorf("Receive: error = %v, want %v", err, container.ErrReceiveEnv)
		}
	})

	t.Run("format", func(t *testing.T) {
		const key = "TEST_ENV_FORMAT"
		t.Setenv(key, "")

		if _, err := container.Receive(key, nil, nil); !errors.Is(err, strconv.ErrSyntax) {
			t.Errorf("Receive: error = %v, want %v", err, strconv.ErrSyntax)
		}
	})

	t.Run("range", func(t *testing.T) {
		const key = "TEST_ENV_RANGE"
		t.Setenv(key, "-1")

		if _, err := container.Receive(key, nil, nil); !errors.Is(err, syscall.EDOM) {
			t.Errorf("Receive: error = %v, want %v", err, syscall.EDOM)
		}
	})
}