Update getting pushrules, add tests, tweak pushrules (#2705)

This PR
- adds tests for `evaluatePushrules`
- removes the need for the UserAPI on the `OutputStreamEventConsumer`
(for easier testing)
- adds a method to get the pushrules from the database
- adds a new default pushrule for `m.reaction` events (and some other
tweaks)

userapi/consumers/syncapi_streamevent_test.go

@@ -0,0 +1,129 @@
+package consumers
+
+import (
+	"context"
+	"testing"
+
+	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/matrix-org/dendrite/internal/pushrules"
+	"github.com/matrix-org/dendrite/setup/config"
+	"github.com/matrix-org/dendrite/test"
+	"github.com/matrix-org/dendrite/userapi/storage"
+)
+
+func mustCreateDatabase(t *testing.T, dbType test.DBType) (storage.Database, func()) {
+	t.Helper()
+	connStr, close := test.PrepareDBConnectionString(t, dbType)
+	db, err := storage.NewUserAPIDatabase(nil, &config.DatabaseOptions{
+		ConnectionString: config.DataSource(connStr),
+	}, "", 4, 0, 0, "")
+	if err != nil {
+		t.Fatalf("failed to create new user db: %v", err)
+	}
+	return db, close
+}
+
+func mustCreateEvent(t *testing.T, content string) *gomatrixserverlib.HeaderedEvent {
+	t.Helper()
+	ev, err := gomatrixserverlib.NewEventFromTrustedJSON([]byte(content), false, gomatrixserverlib.RoomVersionV10)
+	if err != nil {
+		t.Fatalf("failed to create event: %v", err)
+	}
+	return ev.Headered(gomatrixserverlib.RoomVersionV10)
+}
+
+func Test_evaluatePushRules(t *testing.T) {
+	ctx := context.Background()
+
+	test.WithAllDatabases(t, func(t *testing.T, dbType test.DBType) {
+		db, close := mustCreateDatabase(t, dbType)
+		defer close()
+		consumer := OutputStreamEventConsumer{db: db}
+
+		testCases := []struct {
+			name         string
+			eventContent string
+			wantAction   pushrules.ActionKind
+			wantActions  []*pushrules.Action
+			wantNotify   bool
+		}{
+			{
+				name:         "m.receipt doesn't notify",
+				eventContent: `{"type":"m.receipt"}`,
+				wantAction:   pushrules.UnknownAction,
+				wantActions:  nil,
+			},
+			{
+				name:         "m.reaction doesn't notify",
+				eventContent: `{"type":"m.reaction"}`,
+				wantAction:   pushrules.DontNotifyAction,
+				wantActions: []*pushrules.Action{
+					{
+						Kind: pushrules.DontNotifyAction,
+					},
+				},
+			},
+			{
+				name:         "m.room.message notifies",
+				eventContent: `{"type":"m.room.message"}`,
+				wantNotify:   true,
+				wantAction:   pushrules.NotifyAction,
+				wantActions: []*pushrules.Action{
+					{Kind: pushrules.NotifyAction},
+					{
+						Kind:  pushrules.SetTweakAction,
+						Tweak: pushrules.HighlightTweak,
+						Value: false,
+					},
+				},
+			},
+			{
+				name:         "m.room.message highlights",
+				eventContent: `{"type":"m.room.message", "content": {"body": "test"} }`,
+				wantNotify:   true,
+				wantAction:   pushrules.NotifyAction,
+				wantActions: []*pushrules.Action{
+					{Kind: pushrules.NotifyAction},
+					{
+						Kind:  pushrules.SetTweakAction,
+						Tweak: pushrules.SoundTweak,
+						Value: "default",
+					},
+					{
+						Kind:  pushrules.SetTweakAction,
+						Tweak: pushrules.HighlightTweak,
+						Value: true,
+					},
+				},
+			},
+		}
+
+		for _, tc := range testCases {
+			t.Run(tc.name, func(t *testing.T) {
+				actions, err := consumer.evaluatePushRules(ctx, mustCreateEvent(t, tc.eventContent), &localMembership{
+					UserID:    "@test:localhost",
+					Localpart: "test",
+					Domain:    "localhost",
+				}, 10)
+				if err != nil {
+					t.Fatalf("failed to evaluate push rules: %v", err)
+				}
+				assert.Equal(t, tc.wantActions, actions)
+				gotAction, _, err := pushrules.ActionsToTweaks(actions)
+				if err != nil {
+					t.Fatalf("failed to get actions: %v", err)
+				}
+				if gotAction != tc.wantAction {
+					t.Fatalf("expected action to be '%s', got '%s'", tc.wantAction, gotAction)
+				}
+				// this is taken from `notifyLocal`
+				if tc.wantNotify && gotAction != pushrules.NotifyAction && gotAction != pushrules.CoalesceAction {
+					t.Fatalf("expected to notify but didn't")
+				}
+			})
+
+		}
+	})
+}