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

1 files changed, 91 insertions, 0 deletions

diff --git a/syncapi/storage/tables/topology_test.go b/syncapi/storage/tables/topology_test.go
new file mode 100644
index 00000000..b6ece0b0
--- /dev/null
+++ b/syncapi/storage/tables/topology_test.go
@@ -0,0 +1,91 @@
+package tables_test
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"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/syncapi/types"
+	"github.com/matrix-org/dendrite/test"
+)
+
+func newTopologyTable(t *testing.T, dbType test.DBType) (tables.Topology, *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.Topology
+	switch dbType {
+	case test.DBTypePostgres:
+		tab, err = postgres.NewPostgresTopologyTable(db)
+	case test.DBTypeSQLite:
+		tab, err = sqlite3.NewSqliteTopologyTable(db)
+	}
+	if err != nil {
+		t.Fatalf("failed to make new table: %s", err)
+	}
+	return tab, db, close
+}
+
+func TestTopologyTable(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 := newTopologyTable(t, dbType)
+		defer close()
+		events := room.Events()
+		err := sqlutil.WithTransaction(db, func(txn *sql.Tx) error {
+			var highestPos types.StreamPosition
+			for i, ev := range events {
+				topoPos, err := tab.InsertEventInTopology(ctx, txn, ev, types.StreamPosition(i))
+				if err != nil {
+					return fmt.Errorf("failed to InsertEventInTopology: %s", err)
+				}
+				// topo pos = depth, depth starts at 1, hence 1+i
+				if topoPos != types.StreamPosition(1+i) {
+					return fmt.Errorf("got topo pos %d want %d", topoPos, 1+i)
+				}
+				highestPos = topoPos + 1
+			}
+			// check ordering works without limit
+			eventIDs, err := tab.SelectEventIDsInRange(ctx, txn, room.ID, 0, highestPos, highestPos, 100, true)
+			if err != nil {
+				return fmt.Errorf("failed to SelectEventIDsInRange: %s", err)
+			}
+			test.AssertEventIDsEqual(t, eventIDs, events[:])
+			eventIDs, err = tab.SelectEventIDsInRange(ctx, txn, room.ID, 0, highestPos, highestPos, 100, false)
+			if err != nil {
+				return fmt.Errorf("failed to SelectEventIDsInRange: %s", err)
+			}
+			test.AssertEventIDsEqual(t, eventIDs, test.Reversed(events[:]))
+			// check ordering works with limit
+			eventIDs, err = tab.SelectEventIDsInRange(ctx, txn, room.ID, 0, highestPos, highestPos, 3, true)
+			if err != nil {
+				return fmt.Errorf("failed to SelectEventIDsInRange: %s", err)
+			}
+			test.AssertEventIDsEqual(t, eventIDs, events[:3])
+			eventIDs, err = tab.SelectEventIDsInRange(ctx, txn, room.ID, 0, highestPos, highestPos, 3, false)
+			if err != nil {
+				return fmt.Errorf("failed to SelectEventIDsInRange: %s", err)
+			}
+			test.AssertEventIDsEqual(t, eventIDs, test.Reversed(events[len(events)-3:]))
+
+			return nil
+		})
+		if err != nil {
+			t.Fatalf("err: %s", err)
+		}
+	})
+}