blaster_test.go

package main

import (
	"testing"

	"github.com/google/go-cmp/cmp"
)

// testEeprom was read from the device after configuring it with Cypress’s Blaster tool.
var testEeprom = []byte{0xb4, 0x4, 0x72, 0x65, 0x90, 0xfe, 0x1e, 0x4, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xa, 0x73, 0x74, 0x61, 0x70, 0x65, 0x6c, 0x62, 0x65, 0x72, 0x67, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x8, 0x6b, 0x69, 0x6e, 0x58, 0x20, 0x68, 0x75, 0x62, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc, 0x30, 0x30, 0x30, 0x35, 0x30, 0x30, 0x33, 0x34, 0x30, 0x33, 0x31, 0x42, 0xff, 0xff, 0xff}

func TestParseEEPROM(t *testing.T) {
	got, err := parse(testEeprom)
	if err != nil {
		t.Fatal(err)
	}
	want := &config{VID: 0x4b4, PID: 0x6572, Removable: 0x1e, Ports: 0x4, MaxPower: 0xfa, Vendor: "stapelberg", Product: "kinX hub", Serial: "00050034031B"}
	if diff := cmp.Diff(got, want); diff != "" {
		t.Fatalf("parse(%x): diff (-got +want):\n%s", testEeprom, diff)
	}

	b, err := got.Marshal()
	if err != nil {
		t.Fatal(err)
	}
	if diff := cmp.Diff(b, testEeprom); diff != "" {
		t.Fatalf("Marshal(): diff (-got +want):\n%s", diff)
	}
}