Add mysql storage backend queue test based on shared queue test code.

Note that this requires the hidden build flag `integration` as well as specifying a DSN flag for the test.
As well the target DSN needs to exist and have the NanoMDM SQL schema present.
You'll also need to clear those commands before every test.

storage/mysql/queue_test.go

@@ -0,0 +1,100 @@
+//go:build integration
+
+package mysql
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"io/ioutil"
+	"testing"
+
+	"github.com/micromdm/nanomdm/mdm"
+	"github.com/micromdm/nanomdm/storage/internal/test"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+var flDSN = flag.String("dsn", "", "DSN of test MySQL instance")
+
+func loadAuthMsg() (*mdm.Authenticate, error) {
+	b, err := ioutil.ReadFile("../../mdm/testdata/Authenticate.2.plist")
+	if err != nil {
+		return nil, err
+	}
+	r, err := mdm.DecodeCheckin(b)
+	if err != nil {
+		return nil, err
+	}
+	a, ok := r.(*mdm.Authenticate)
+	if !ok {
+		return nil, errors.New("not an Authenticate message")
+	}
+	return a, nil
+}
+
+func loadTokenMsg() (*mdm.TokenUpdate, error) {
+	b, err := ioutil.ReadFile("../../mdm/testdata/TokenUpdate.2.plist")
+	if err != nil {
+		return nil, err
+	}
+	r, err := mdm.DecodeCheckin(b)
+	if err != nil {
+		return nil, err
+	}
+	a, ok := r.(*mdm.TokenUpdate)
+	if !ok {
+		return nil, errors.New("not a TokenUpdate message")
+	}
+	return a, nil
+}
+
+const deviceUDID = "66ADE930-5FDF-5EC4-8429-15640684C489"
+
+func newMdmReq() *mdm.Request {
+	return &mdm.Request{
+		Context: context.Background(),
+		EnrollID: &mdm.EnrollID{
+			Type: mdm.Device,
+			ID:   deviceUDID,
+		},
+	}
+}
+
+func enrollTestDevice(storage *MySQLStorage) error {
+	authMsg, err := loadAuthMsg()
+	if err != nil {
+		return err
+	}
+	err = storage.StoreAuthenticate(newMdmReq(), authMsg)
+	if err != nil {
+		return err
+	}
+	tokenMsg, err := loadTokenMsg()
+	if err != nil {
+		return err
+	}
+	err = storage.StoreTokenUpdate(newMdmReq(), tokenMsg)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func TestQueue(t *testing.T) {
+	if *flDSN == "" {
+		t.Fatal("MySQL DSN flag not provided to test")
+	}
+
+	storage, err := New(WithDSN(*flDSN))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = enrollTestDevice(storage)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	test.TestQueue(t, deviceUDID, storage)
+}