pipes/store_test.go at master · commandn/pipes · GitHub

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package pipes

import (
	"context"
	"testing"

	"github.com/stretchr/testify/require"
)

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

	s := NewStore()

	err := s.Register(1)
	require.NoError(t, err)

	err = s.Register(1)
	require.ErrorIs(t, err, ErrStateAlreadyRegistered)

	err = s.Register(2)
	require.NoError(t, err)

	err = s.Register(3)
	require.NoError(t, err)
}

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

	s := NewStore()

	err := s.Write(1, nil, nil)
	require.ErrorIs(t, err, ErrStateNotRegistered)

	err = s.Register(1)
	require.NoError(t, err)

	err = s.Write(1, nil, nil)
	require.NoError(t, err)

	require.Panics(t, func() {
		err = s.Write(1, nil, nil)
		require.ErrorContains(t, err, "panic recover")
	})
}

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

	s := NewStore()
	ctx := context.Background()

	data, err := s.Read(ctx, 1)
	require.ErrorIs(t, err, ErrStateNotRegistered)
	require.Nil(t, data)

	err = s.Register(1)
	require.NoError(t, err)

	err = s.Write(1, 42, nil)
	require.NoError(t, err)

	data, err = s.Read(ctx, 1)
	require.NoError(t, err)
	require.Equal(t, 42, data)
}

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

	s := NewStore()
	require.NoError(t, s.Register(1))
	require.NoError(t, s.Register(2))
	require.NoError(t, s.Write(1, 42, nil))
	require.NoError(t, s.Write(2, nil, context.Canceled))

	_, err := Read[string](context.Background(), s, 1)
	require.ErrorContains(t, err, "invalid type")

	result1, err := Read[int](context.Background(), s, 1)
	require.NoError(t, err)
	require.Equal(t, 42, result1)

	result2, err := Read[any](context.Background(), s, 2)
	require.Nil(t, result2)
	require.ErrorIs(t, err, context.Canceled)
}

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

	s := NewStore()
	ctx, cancelFn := context.WithCancel(context.Background())

	err := s.Register(1)
	require.NoError(t, err)

	cancelFn()

	_, err = Read[int](ctx, s, 1)
	require.ErrorIs(t, err, context.Canceled)
}