golib/network/byte_test.go

package network

import (
	"bytes"
	"testing"
)

const (
	testHex1 = "0x0a 0x0b 0x0c 0x0d"
	testHex2 = "0a 0b 0c 0d"
)

var (
	testBytes = []byte{0x0a, 0x0b, 0x0c, 0x0d}
)

func TestHex2Bytes(t *testing.T) {
	if b, ok := Hex2Bytes(testHex1); !ok {
		t.Error("Hex2Bytes failed:", testHex1)
		return
	} else {
		t.Logf("testHex1: %s === %v", testHex1, b)
	}
	if b, ok := Hex2Bytes(testHex2); !ok {
		t.Error("Hex2Bytes failed:", testHex2)
		return
	} else {
		t.Logf("testHex2: %s === %v", testHex2, b)
	}
}

func TestCRC16Modbus(t *testing.T) {
	crcResult, ok := Hex2Bytes("FB B6") // 大端模式 251,182
	if !ok {
		t.Error("build crc result failed:", crcResult)
		return
	}
	crc := CRC16Modbus(testBytes)
	if !bytes.Equal(crcResult, BigEndian.PutUint16(crc)) {
		t.Errorf("needed: %v, got: %v", crcResult, crc)
	}
}

func TestRemake(t *testing.T) {
	old := testBytes[:2] // question: len == 2, cap == 4
	b := Remake(old)     // wants: len == 2, cap == 2
	if len(b) != cap(b) {
		t.Errorf("remake failed: len(%d), cap(%d)", len(b), cap(b))
	}
}

func TestBytesEqual(t *testing.T) {
	if !BytesEqual([]byte{0xa, 0xb}, testBytes[:2]) {
		t.Error("failed")
	}
}

func TestName(t *testing.T) {
	b := []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09}
	t.Log(b[:6])
}