// Licensed to Apache Software Foundation (ASF) under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Apache Software Foundation (ASF) licenses this file to you 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 bydbql

import "testing"

func TestIsReadOnly(t *testing.T) {
	readQuery := "SELECT endpoint FROM MEASURE service_latency IN production TIME > '-30m' LIMIT 10"
	if !IsReadOnly(readQuery) {
		t.Fatalf("expected select query to be read-only")
	}
	topNQuery := "SHOW TOP 10 FROM MEASURE endpoint_latency IN sw_metrics TIME > '-30m' ORDER BY DESC"
	if !IsReadOnly(topNQuery) {
		t.Fatalf("expected show top query to be read-only")
	}
	if IsReadOnly("CREATE MEASURE foo IN production") {
		t.Fatal("mutating statement must not be read-only")
	}
	if IsReadOnly("not a query") {
		t.Fatal("unparseable statement must not be read-only")
	}
	if IsReadOnly("") {
		t.Fatal("empty statement must not be read-only")
	}
}
