90 lines
3.3 KiB
Go
90 lines
3.3 KiB
Go
// Copyright 2020 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/pingcap/check"
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"github.com/pingcap/parser/charset"
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"github.com/pingcap/parser/mysql"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/chunk"
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"github.com/pingcap/tidb/util/collate"
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"github.com/pingcap/tidb/util/mock"
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)
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var _ = SerialSuites(&testCollationSuites{})
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type testCollationSuites struct{}
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func (s *testCollationSuites) TestCompareString(c *C) {
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collate.SetNewCollationEnabledForTest(true)
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defer collate.SetNewCollationEnabledForTest(false)
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c.Assert(types.CompareString("a", "A", "utf8_general_ci"), Equals, 0)
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c.Assert(types.CompareString("À", "A", "utf8_general_ci"), Equals, 0)
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c.Assert(types.CompareString("😜", "😃", "utf8_general_ci"), Equals, 0)
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c.Assert(types.CompareString("a ", "a ", "utf8_general_ci"), Equals, 0)
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c.Assert(types.CompareString("ß", "s", "utf8_general_ci"), Equals, 0)
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c.Assert(types.CompareString("ß", "ss", "utf8_general_ci"), Not(Equals), 0)
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c.Assert(types.CompareString("a", "A", "utf8_unicode_ci"), Equals, 0)
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c.Assert(types.CompareString("À", "A", "utf8_unicode_ci"), Equals, 0)
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c.Assert(types.CompareString("😜", "😃", "utf8_unicode_ci"), Equals, 0)
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c.Assert(types.CompareString("a ", "a ", "utf8_unicode_ci"), Equals, 0)
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c.Assert(types.CompareString("ß", "s", "utf8_unicode_ci"), Not(Equals), 0)
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c.Assert(types.CompareString("ß", "ss", "utf8_unicode_ci"), Equals, 0)
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c.Assert(types.CompareString("a", "A", "binary"), Not(Equals), 0)
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c.Assert(types.CompareString("À", "A", "binary"), Not(Equals), 0)
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c.Assert(types.CompareString("😜", "😃", "binary"), Not(Equals), 0)
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c.Assert(types.CompareString("a ", "a ", "binary"), Not(Equals), 0)
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ctx := mock.NewContext()
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ft := types.NewFieldType(mysql.TypeVarString)
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col1 := &Column{
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RetType: ft,
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Index: 0,
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}
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col2 := &Column{
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RetType: ft,
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Index: 1,
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}
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chk := chunk.NewChunkWithCapacity([]*types.FieldType{ft, ft}, 4)
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chk.Column(0).AppendString("a")
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chk.Column(1).AppendString("A")
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chk.Column(0).AppendString("À")
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chk.Column(1).AppendString("A")
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chk.Column(0).AppendString("😜")
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chk.Column(1).AppendString("😃")
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chk.Column(0).AppendString("a ")
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chk.Column(1).AppendString("a ")
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for i := 0; i < 4; i++ {
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v, isNull, err := CompareStringWithCollationInfo(ctx, col1, col2, chk.GetRow(0), chk.GetRow(0), "utf8_general_ci")
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c.Assert(err, IsNil)
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c.Assert(isNull, IsFalse)
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c.Assert(v, Equals, int64(0))
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}
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}
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func (s *testCollationSuites) TestDeriveCollationFromExprs(c *C) {
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tInt := types.NewFieldType(mysql.TypeLonglong)
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tInt.Charset = charset.CharsetBin
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ctx := mock.NewContext()
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// no string column
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chs, coll := DeriveCollationFromExprs(ctx, newColumnWithType(0, tInt), newColumnWithType(0, tInt), newColumnWithType(0, tInt))
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c.Assert(chs, Equals, charset.CharsetBin)
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c.Assert(coll, Equals, charset.CollationBin)
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}
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