feat: Implement Ping and PingContext functionality in http driver

Signed-off-by: Erik Westra <[email protected]>

libsql/internal/http/hranaV2/hranaV2.go

@@ -89,6 +89,15 @@ type hranaV2Conn struct {
 	streamClosed bool
 }
 
+func (h *hranaV2Conn) Ping() error {
+	return h.PingContext(context.Background())
+}
+
+func (h *hranaV2Conn) PingContext(ctx context.Context) error {
+	_, err := h.executeStmt(ctx, "SELECT 1", nil, false)
+	return err
+}
+
 func (h *hranaV2Conn) Prepare(query string) (driver.Stmt, error) {
 	return h.PrepareContext(context.Background(), query)
 }

tests/http/driver_test.go

@@ -239,6 +239,24 @@ func (t Tx) prepareInsertStmt() PreparedStmt {
 	return PreparedStmt{stmt, t.t}
 }
 
+func TestPing(t *testing.T) {
+	t.Parallel()
+	db := getDb(T{t})
+
+	// This ping should succeed because the database is up and running
+	db.t.FatalOnError(db.Ping())
+
+	t.Cleanup(func() {
+		db.Close()
+
+		// This ping should return an error because the database is already closed
+		err := db.Ping()
+		if err == nil {
+			db.t.Fatal("db.Ping succeeded when it should have failed")
+		}
+	})
+}
+
 func TestExecAndQuery(t *testing.T) {
 	t.Parallel()
 	db := getDb(T{t})