Add test infrastructure code for dendrite unit/integ tests (#2331)

* Add test infrastructure code for dendrite unit/integ tests

Start re-enabling some syncapi storage tests in the process.

* Linting

* Add postgres service to unit tests

* dendrite not syncv3

* Skip test which doesn't work

* Linting

* Add `jetstream.PrepareForTests`

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>

test/event.go

@@ -0,0 +1,51 @@
+// Copyright 2022 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package test
+
+import (
+	"crypto/ed25519"
+	"time"
+
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+type eventMods struct {
+	originServerTS time.Time
+	origin         gomatrixserverlib.ServerName
+	stateKey       *string
+	unsigned       interface{}
+	keyID          gomatrixserverlib.KeyID
+	privKey        ed25519.PrivateKey
+}
+
+type eventModifier func(e *eventMods)
+
+func WithTimestamp(ts time.Time) eventModifier {
+	return func(e *eventMods) {
+		e.originServerTS = ts
+	}
+}
+
+func WithStateKey(skey string) eventModifier {
+	return func(e *eventMods) {
+		e.stateKey = &skey
+	}
+}
+
+func WithUnsigned(unsigned interface{}) eventModifier {
+	return func(e *eventMods) {
+		e.unsigned = unsigned
+	}
+}