testDBPath to package variables

usbid/parse_test.go

@@ -31,7 +31,6 @@ func mustRead(fname string) string {
 }
 
 func TestParse(t *testing.T) {
-	testDBPath := "testdata/testdb.txt"
 	vendors, classes, err := ParseIDs(strings.NewReader(mustRead(testDBPath)))
 	if err != nil {
 		t.Fatalf("ParseIDs(%q): %s", testDBPath, err)

usbid/testdata_test.go

@@ -17,6 +17,7 @@ package usbid
 import "github.com/kylelemons/gousb/usb"
 
 var (
+	testDBPath    = "testdata/testdb.txt"
 	testDBVendors = map[usb.ID]*Vendor{
 		0xabcd: {
 			Name: "Vendor One",