lancet/concurrency/channel_test.go

package concurrency

import (
	"context"
	"testing"

	"github.com/duke-git/lancet/v2/internal"
)

func TestGenerate(t *testing.T) {
	assert := internal.NewAssert(t, "TestGenerate")

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	c := NewChannel()
	intStream := c.Generate(ctx, 1, 2, 3)

	// for v := range intStream {
	// 	t.Log(v) //1, 2, 3
	// }
	assert.Equal(1, <-intStream)
	assert.Equal(2, <-intStream)
	assert.Equal(3, <-intStream)
}

func TestRepeat(t *testing.T) {
	assert := internal.NewAssert(t, "TestRepeat")

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	c := NewChannel()
	intStream := c.Take(ctx, c.Repeat(ctx, 1, 2), 5)

	// for v := range intStream {
	// 	t.Log(v) //1, 2, 1, 2, 1
	// }
	assert.Equal(1, <-intStream)
	assert.Equal(2, <-intStream)
	assert.Equal(1, <-intStream)
	assert.Equal(2, <-intStream)
	assert.Equal(1, <-intStream)
}

func TestRepeatFn(t *testing.T) {
	assert := internal.NewAssert(t, "TestRepeatFn")

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	fn := func() any {
		s := "a"
		return s
	}
	c := NewChannel()
	dataStream := c.Take(ctx, c.RepeatFn(ctx, fn), 3)

	// for v := range dataStream {
	// 	t.Log(v) //a, a, a
	// }

	assert.Equal("a", <-dataStream)
	assert.Equal("a", <-dataStream)
	assert.Equal("a", <-dataStream)
}

func TestTake(t *testing.T) {
	assert := internal.NewAssert(t, "TestRepeat")

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	numbers := make(chan any, 5)
	numbers <- 1
	numbers <- 2
	numbers <- 3
	numbers <- 4
	numbers <- 5
	defer close(numbers)

	c := NewChannel()
	intStream := c.Take(ctx, numbers, 3)

	// for v := range intStream {
	// 	t.Log(v) //1, 2, 3
	// }

	assert.Equal(1, <-intStream)
	assert.Equal(2, <-intStream)
	assert.Equal(3, <-intStream)
}