syncapi: add more tests; fix more bugs (#2338)

* syncapi: add more tests; fix more bugs

bugfixes:
 - The postgres impl of TopologyTable.SelectEventIDsInRange did not use the provided txn
 - The postgres impl of EventsTable.SelectEvents did not preserve the ordering of the input event IDs in the output events slice
 - The sqlite impl of EventsTable.SelectEvents did not use a bulk `IN ($1)` query.

Added tests:
 - `TestGetEventsInRangeWithTopologyToken`
 - `TestOutputRoomEventsTable`
 - `TestTopologyTable`

* -p 1 for now

syncapi/storage/tables/output_room_events_test.go

@@ -0,0 +1,82 @@
+package tables_test
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/matrix-org/dendrite/internal/sqlutil"
+	"github.com/matrix-org/dendrite/setup/config"
+	"github.com/matrix-org/dendrite/syncapi/storage/postgres"
+	"github.com/matrix-org/dendrite/syncapi/storage/sqlite3"
+	"github.com/matrix-org/dendrite/syncapi/storage/tables"
+	"github.com/matrix-org/dendrite/test"
+)
+
+func newOutputRoomEventsTable(t *testing.T, dbType test.DBType) (tables.Events, *sql.DB, func()) {
+	t.Helper()
+	connStr, close := test.PrepareDBConnectionString(t, dbType)
+	db, err := sqlutil.Open(&config.DatabaseOptions{
+		ConnectionString: config.DataSource(connStr),
+	})
+	if err != nil {
+		t.Fatalf("failed to open db: %s", err)
+	}
+
+	var tab tables.Events
+	switch dbType {
+	case test.DBTypePostgres:
+		tab, err = postgres.NewPostgresEventsTable(db)
+	case test.DBTypeSQLite:
+		var stream sqlite3.StreamIDStatements
+		if err = stream.Prepare(db); err != nil {
+			t.Fatalf("failed to prepare stream stmts: %s", err)
+		}
+		tab, err = sqlite3.NewSqliteEventsTable(db, &stream)
+	}
+	if err != nil {
+		t.Fatalf("failed to make new table: %s", err)
+	}
+	return tab, db, close
+}
+
+func TestOutputRoomEventsTable(t *testing.T) {
+	ctx := context.Background()
+	alice := test.NewUser()
+	room := test.NewRoom(t, alice)
+	test.WithAllDatabases(t, func(t *testing.T, dbType test.DBType) {
+		tab, db, close := newOutputRoomEventsTable(t, dbType)
+		defer close()
+		events := room.Events()
+		err := sqlutil.WithTransaction(db, func(txn *sql.Tx) error {
+			for _, ev := range events {
+				_, err := tab.InsertEvent(ctx, txn, ev, nil, nil, nil, false)
+				if err != nil {
+					return fmt.Errorf("failed to InsertEvent: %s", err)
+				}
+			}
+			// order = 2,0,3,1
+			wantEventIDs := []string{
+				events[2].EventID(), events[0].EventID(), events[3].EventID(), events[1].EventID(),
+			}
+			gotEvents, err := tab.SelectEvents(ctx, txn, wantEventIDs, true)
+			if err != nil {
+				return fmt.Errorf("failed to SelectEvents: %s", err)
+			}
+			gotEventIDs := make([]string, len(gotEvents))
+			for i := range gotEvents {
+				gotEventIDs[i] = gotEvents[i].EventID()
+			}
+			if !reflect.DeepEqual(gotEventIDs, wantEventIDs) {
+				return fmt.Errorf("SelectEvents\ngot  %v\n want %v", gotEventIDs, wantEventIDs)
+			}
+
+			return nil
+		})
+		if err != nil {
+			t.Fatalf("err: %s", err)
+		}
+	})
+}