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Copyright 2017 Google Inc.
Licensed 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 sqlparser
func TestLiteralID(t *testing.T) {
	testcases := []struct {
		in  string
		out string
		in:  "`aa`",
		out: "aa",
		in:  "```a```",
		out: "`a`",
		in:  "`a``b`",
		out: "a`b",
		in:  "`a``b`c",
		out: "a`b",
		in:  "`a``b",
		id:  LEX_ERROR,
		out: "a`b",
		in:  "`a``b``",
		id:  LEX_ERROR,
		out: "a`b`",
		in:  "``",
		id:  LEX_ERROR,
	for _, tcase := range testcases {
		tkn := NewStringTokenizer(tcase.in)
		id, out := tkn.Scan()
		if tcase.id != id || string(out) != tcase.out {
			t.Errorf("Scan(%s): %d, %s, want %d, %s", tcase.in, id, out, tcase.id, tcase.out)
func tokenName(id int) string {
	if id == STRING {
		return "STRING"
	} else if id == LEX_ERROR {
		return "LEX_ERROR"
	return fmt.Sprintf("%d", id)
func TestString(t *testing.T) {
	testcases := []struct {
		in   string
		want string
		in:   "''",
		id:   STRING,
		want: "",
		in:   "''''",
		id:   STRING,
		want: "'",
		in:   "'hello'",
		id:   STRING,
		want: "hello",
		in:   "'\\n'",
		id:   STRING,
		want: "\\n",
		in:   "'\\nhello\\n'",
		id:   STRING,
		want: "\\nhello\\n",
		in:   "'a''b'",
		id:   STRING,
		want: "a'b",
		in:   "'a\\'b'",
		id:   STRING,
		want: "a\\",
		in:   "'\\'",
		id:   STRING,
		want: "\\",
		in:   "'",
		id:   LEX_ERROR,
		want: "",
		in:   "'hello\\'",
		id:   STRING,
		want: "hello\\",
		in:   "'hello",
		id:   LEX_ERROR,
		want: "hello",
		in:   "'hello\\",
		id:   LEX_ERROR,
		want: "hello\\",
	for _, tcase := range testcases {
		id, got := NewStringTokenizer(tcase.in).Scan()
		if tcase.id != id || string(got) != tcase.want {
			t.Errorf("Scan(%q) = (%s, %q), want (%s, %q)", tcase.in, tokenName(id), got, tokenName(tcase.id), tcase.want)
func TestSplitStatement(t *testing.T) {
	testcases := []struct {
		in  string
		sql string
		rem string
		in:  "select * from table",
		sql: "select * from table",
		in:  "select * from table; ",
		sql: "select * from table",
		rem: " ",
		in:  "select * from table; select * from table2;",
		sql: "select * from table",
		rem: " select * from table2;",
		in:  "select * from /* comment */ table;",
		sql: "select * from /* comment */ table",
		in:  "select * from /* comment ; */ table;",
		sql: "select * from /* comment ; */ table",
		in:  "select * from table where semi = ';';",
		sql: "select * from table where semi = ';'",
		in:  "-- select * from table",
		sql: "-- select * from table",
		in:  " ",
		sql: " ",
	for _, tcase := range testcases {
		sql, rem, err := SplitStatement(tcase.in)
		if err != nil {
			t.Errorf("EndOfStatementPosition(%s): ERROR: %v", tcase.in, err)
			continue
		if tcase.sql != sql {
			t.Errorf("EndOfStatementPosition(%s) got sql \"%s\" want \"%s\"", tcase.in, sql, tcase.sql)
		if tcase.rem != rem {
			t.Errorf("EndOfStatementPosition(%s) got remainder \"%s\" want \"%s\"", tcase.in, rem, tcase.rem)

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