dvb-go/bits_test.go at master · func2/dvb-go · GitHub

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package dvb

import (
	"dvb-go/pkg/utils"
	"testing"

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

func TestSliceU8toU16LE(t *testing.T) {
	t.Parallel()

	t.Run("safe", func(t *testing.T) {
		assert.Equal(t, []uint16{0b11111111_00000000}, sliceU8toU16LE([]uint8{0b00000000, 0b11111111}))
		assert.Equal(t, []uint16{0b11111111_00000000, 0b11111111_00000000}, sliceU8toU16LE([]uint8{0b0000000, 0b11111111, 0b00000000, 0b11111111}))
		// assert.Equal(t, []uint16{0b11111111_00000000}, uint8ToUint16LE([]byte{0b11111111}))
	})

	t.Run("unsafe", func(t *testing.T) {
		assert.Equal(t, []uint16{0b11111111_00000000}, sliceU8toU16LEUnsafe([]uint8{0b00000000, 0b11111111}))
		assert.Equal(t, []uint16{0b11111111_00000000, 0b11111111_00000000}, sliceU8toU16LEUnsafe([]uint8{0b0000000, 0b11111111, 0b00000000, 0b11111111}))
		// assert.Equal(t, []uint16{0b11111111_00000000}, uint8ToUint16Unsafe([]byte{0b11111111}))
	})
}

func BenchmarkSliceU8toU16(b *testing.B) {
	sliceSize := 10

	b.Run("safe", func(b *testing.B) {
		data := utils.RandomU8Slice(sliceSize)
		b.ResetTimer()
		for i := 0; i < b.N; i++ {
			_ = sliceU8toU16LE(data)
		}
	})

	b.Run("unsafe", func(b *testing.B) {
		data := utils.RandomU8Slice(sliceSize)
		b.ResetTimer()
		for i := 0; i < b.N; i++ {
			_ = sliceU8toU16LEUnsafe(data)
		}
	})
}

func TestU16toU8(t *testing.T) {
	t.Parallel()

	u8 := U16toU8LE(uint16(0b00000000_11111111))
	assert.Equal(t, []byte{0xFF, 0x00}, u8)
}

func TestSliceU16toU8LE(t *testing.T) {
	t.Parallel()

	t.Run("safe", func(t *testing.T) {
		assert.Equal(t, []uint8{0b00000000, 0b11111111}, sliceU16toU8LE([]uint16{0b11111111_00000000}))
		assert.Equal(t, []uint8{0b11111111, 0b00000000}, sliceU16toU8LE([]uint16{0b00000000_11111111}))
	})

	t.Run("unsafe", func(t *testing.T) {
		assert.Equal(t, []uint8{0b00000000, 0b11111111}, sliceU16toU8Unsafe([]uint16{0b11111111_00000000}))
		assert.Equal(t, []uint8{0b11111111, 0b00000000}, sliceU16toU8Unsafe([]uint16{0b00000000_11111111}))
	})
}

func BenchmarkSliceU16toU8(b *testing.B) {
	sliceSize := 10

	b.Run("safe", func(b *testing.B) {
		data := utils.RandomU16Slice(sliceSize)
		b.ResetTimer()
		for i := 0; i < b.N; i++ {
			// _ = sliceU16toU8([]uint16{0b00000000_11111111})
			_ = sliceU16toU8LE(data)
		}
	})

	b.Run("unsafe", func(b *testing.B) {
		data := utils.RandomU16Slice(sliceSize)
		b.ResetTimer()
		for i := 0; i < b.N; i++ {
			// _ = sliceU16toU8Unsafe([]uint16{0b00000000_11111111})
			_ = sliceU16toU8Unsafe(data)
		}
	})
}