122 lines
3.1 KiB
Go
122 lines
3.1 KiB
Go
// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package expression
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import (
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"github.com/juju/errors"
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. "github.com/pingcap/check"
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)
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var _ = Suite(&testLikeSuite{})
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type testLikeSuite struct {
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}
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func (*testLikeSuite) TestLike(c *C) {
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tbl := []struct {
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pattern string
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input string
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match bool
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}{
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{"", "a", false},
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{"a", "a", true},
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{"a", "b", false},
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{"aA", "aA", true},
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{"_", "a", true},
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{"_", "ab", false},
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{"__", "b", false},
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{"_ab", "AAB", true},
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{"%", "abcd", true},
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{"%", "", true},
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{"%a", "AAA", true},
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{"%b", "AAA", false},
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{"b%", "BBB", true},
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{"%a%", "BBB", false},
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{"%a%", "BAB", true},
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{"a%", "BBB", false},
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{`\%a`, `%a`, true},
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{`\%a`, `aa`, false},
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{`\_a`, `_a`, true},
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{`\_a`, `aa`, false},
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{`\\_a`, `\xa`, true},
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{`\a\b`, `\a\b`, true},
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{"%%_", `abc`, true},
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}
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for _, v := range tbl {
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patChars, patTypes := compilePattern(v.pattern)
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match := doMatch(v.input, patChars, patTypes)
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c.Assert(match, Equals, v.match, Commentf("%v", v))
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}
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}
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func (*testLikeSuite) TestEval(c *C) {
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pattern := &PatternLike{
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Expr: &Value{
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Val: "aA",
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},
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Pattern: &Value{
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Val: "aA",
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},
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}
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cloned := pattern.Clone()
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pattern = cloned.(*PatternLike)
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c.Assert(pattern.IsStatic(), IsTrue)
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c.Assert(pattern.String(), Not(Equals), "")
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val, err := pattern.Eval(nil, nil)
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c.Assert(err, IsNil)
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c.Assert(val, IsTrue)
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pattern.Not = true
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val, err = pattern.Eval(nil, nil)
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c.Assert(err, IsNil)
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c.Assert(val, IsFalse)
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pattern.Pattern = mockExpr{isStatic: false, err: errors.Errorf("test error")}
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c.Assert(pattern.Clone(), NotNil)
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_, err = pattern.Eval(nil, nil)
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c.Assert(err, NotNil)
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pattern.Pattern = mockExpr{isStatic: false, val: nil}
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_, err = pattern.Eval(nil, nil)
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c.Assert(err, IsNil)
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pattern.Pattern = mockExpr{isStatic: false, val: 123}
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_, err = pattern.Eval(nil, nil)
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c.Assert(err, NotNil)
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pattern.Expr = mockExpr{isStatic: false, err: errors.Errorf("test error")}
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c.Assert(pattern.Clone(), NotNil)
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_, err = pattern.Eval(nil, nil)
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c.Assert(err, NotNil)
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pattern.Expr = mockExpr{isStatic: false, val: 123}
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_, err = pattern.Eval(nil, nil)
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c.Assert(err, NotNil)
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pattern.Expr = mockExpr{isStatic: false, val: nil}
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_, err = pattern.Eval(nil, nil)
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c.Assert(err, IsNil)
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// Testcase for "LIKE BINARY xxx"
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pattern = &PatternLike{
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Expr: mockExpr{isStatic: true, val: "slien"},
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Pattern: mockExpr{isStatic: true, val: []byte("%E%")},
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}
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v, err := pattern.Eval(nil, nil)
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c.Assert(err, IsNil)
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c.Assert(v, IsTrue)
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pattern = &PatternLike{
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Expr: mockExpr{isStatic: true, val: "slin"},
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Pattern: mockExpr{isStatic: true, val: []byte("%E%")},
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}
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v, err = pattern.Eval(nil, nil)
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c.Assert(err, IsNil)
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c.Assert(v, IsFalse)
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}
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