Function TestResultErrorGroup

pool/result_error_pool_test.go:14–131

(t *testing.T)

)

func TestResultErrorGroup(t *testing.T) {
	t.Parallel()

	err1 := errors.New("err1")
	err2 := errors.New("err2")

	t.Run("panics on configuration after init", func(t *testing.T) {
		t.Run("before wait", func(t *testing.T) {
			t.Parallel()
			g := NewWithResults[int]().WithErrors()
			g.Go(func() (int, error) { return 0, nil })
			require.Panics(t, func() { g.WithMaxGoroutines(10) })
		})

		t.Run("after wait", func(t *testing.T) {
			t.Parallel()
			g := NewWithResults[int]().WithErrors()
			g.Go(func() (int, error) { return 0, nil })
			_, _ = g.Wait()
			require.Panics(t, func() { g.WithMaxGoroutines(10) })
		})
	})

	t.Run("wait returns no error if no errors", func(t *testing.T) {
		t.Parallel()
		g := NewWithResults[int]().WithErrors()
		g.Go(func() (int, error) { return 1, nil })
		res, err := g.Wait()
		require.NoError(t, err)
		require.Equal(t, []int{1}, res)
	})

	t.Run("wait error if func returns error", func(t *testing.T) {
		t.Parallel()
		g := NewWithResults[int]().WithErrors()
		g.Go(func() (int, error) { return 0, err1 })
		res, err := g.Wait()
		require.Len(t, res, 0) // errored value is ignored
		require.ErrorIs(t, err, err1)
	})

	t.Run("WithCollectErrored", func(t *testing.T) {
		t.Parallel()
		g := NewWithResults[int]().WithErrors().WithCollectErrored()
		g.Go(func() (int, error) { return 0, err1 })
		res, err := g.Wait()
		require.Len(t, res, 1) // errored value is collected
		require.ErrorIs(t, err, err1)
	})

	t.Run("WithFirstError", func(t *testing.T) {
		t.Parallel()
		g := NewWithResults[int]().WithErrors().WithFirstError()
		synchronizer := make(chan struct{})
		g.Go(func() (int, error) {
			<-synchronizer
			// This test has an intrinsic race condition that can be reproduced
			// by adding a `defer time.Sleep(time.Second)` before the `defer