// Copyright (c) 2015-2021 MinIO, Inc.//// This file is part of MinIO Object Storage stack//// This program is free software: you can redistribute it and/or modify// it under the terms of the GNU Affero General Public License as published by// the Free Software Foundation, either version 3 of the License, or// (at your option) any later version.//// This program is distributed in the hope that it will be useful// but WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the// GNU Affero General Public License for more details.//// You should have received a copy of the GNU Affero General Public License// along with this program.  If not, see <http://www.gnu.org/licenses/>. package sql import (	"testing") func TestEvalSQLLike(t *testing.T) {	dropCases := []struct {		input, resultExpected string		matchExpected         bool	}{		{"", "", false},		{"a", "", true},		{"ab", "b", true},		{"தமிழ்", "மிழ்", true},	} 	for i, tc := range dropCases {		res, ok := dropRune(tc.input)		if res != tc.resultExpected || ok != tc.matchExpected {			t.Errorf("DropRune Case %d failed", i)		}	} 	matcherCases := []struct {		iText, iPat        string		iHasLeadingPercent bool		resultExpected     string		matchExpected      bool	}{		{"abcd", "bcd", false, "", false},		{"abcd", "bcd", true, "", true},		{"abcd", "abcd", false, "", true},		{"abcd", "abcd", true, "", true},		{"abcd", "ab", false, "cd", true},		{"abcd", "ab", true, "cd", true},		{"abcd", "bc", false, "", false},		{"abcd", "bc", true, "d", true},	} 	for i, tc := range matcherCases {		res, ok := matcher(tc.iText, tc.iPat, tc.iHasLeadingPercent)		if res != tc.resultExpected || ok != tc.matchExpected {			t.Errorf("Matcher Case %d failed", i)		}	} 	evalCases := []struct {		iText, iPat   string		iEsc          rune		matchExpected bool		errExpected   error	}{		{"abcd", "abc", runeZero, false, nil},		{"abcd", "abcd", runeZero, true, nil},		{"abcd", "abc_", runeZero, true, nil},		{"abcd", "_bdd", runeZero, false, nil},		{"abcd", "_b_d", runeZero, true, nil}, 		{"abcd", "____", runeZero, true, nil},		{"abcd", "____%", runeZero, true, nil},		{"abcd", "%____", runeZero, true, nil},		{"abcd", "%__", runeZero, true, nil},		{"abcd", "____", runeZero, true, nil}, 		{"", "_", runeZero, false, nil},		{"", "%", runeZero, true, nil},		{"abcd", "%%%%%", runeZero, true, nil},		{"abcd", "_____", runeZero, false, nil},		{"abcd", "%%%%%", runeZero, true, nil}, 		{"a%%d", `a\%\%d`, '\\', true, nil},		{"a%%d", `a\%d`, '\\', false, nil},		{`a%%\d`, `a\%\%\\d`, '\\', true, nil},		{`a%%\`, `a\%\%\\`, '\\', true, nil},		{`a%__%\`, `a\%\_\_\%\\`, '\\', true, nil}, 		{`a%__%\`, `a\%\_\_\%_`, '\\', true, nil},		{`a%__%\`, `a\%\_\__`, '\\', false, nil},		{`a%__%\`, `a\%\_\_%`, '\\', true, nil},		{`a%__%\`, `a?%?_?_?%\`, '?', true, nil},	} 	for i, tc := range evalCases {		// fmt.Println("Case:", i)		res, err := evalSQLLike(tc.iText, tc.iPat, tc.iEsc)		if res != tc.matchExpected || err != tc.errExpected {			t.Errorf("Eval Case %d failed: %v %v", i, res, err)		}	}}