60 lines
2.0 KiB
Go
60 lines
2.0 KiB
Go
// Copyright 2020 PingCAP, 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 aggfuncs_test
|
|
|
|
import (
|
|
"fmt"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/pingcap/tidb/executor/aggfuncs"
|
|
"github.com/pingcap/tidb/parser/ast"
|
|
"github.com/pingcap/tidb/parser/mysql"
|
|
"github.com/pingcap/tidb/types"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
type testSlice []int
|
|
|
|
func (a testSlice) Len() int { return len(a) }
|
|
func (a testSlice) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
|
|
func (a testSlice) Less(i, j int) bool { return a[i] < a[j] }
|
|
|
|
func TestPercentile(t *testing.T) {
|
|
tests := []aggTest{
|
|
buildAggTester(ast.AggFuncApproxPercentile, mysql.TypeLonglong, 5, nil, 2),
|
|
buildAggTester(ast.AggFuncApproxPercentile, mysql.TypeFloat, 5, nil, 2.0),
|
|
buildAggTester(ast.AggFuncApproxPercentile, mysql.TypeDouble, 5, nil, 2.0),
|
|
buildAggTester(ast.AggFuncApproxPercentile, mysql.TypeNewDecimal, 5, nil, types.NewDecFromFloatForTest(2.0)),
|
|
buildAggTester(ast.AggFuncApproxPercentile, mysql.TypeDate, 5, nil, types.TimeFromDays(367)),
|
|
buildAggTester(ast.AggFuncApproxPercentile, mysql.TypeDuration, 5, nil, types.Duration{Duration: time.Duration(2)}),
|
|
}
|
|
for i, test := range tests {
|
|
t.Run(fmt.Sprintf("%s_%d", test.funcName, i), func(t *testing.T) {
|
|
testAggFunc(t, test)
|
|
})
|
|
}
|
|
|
|
data := testSlice{}
|
|
want := 28
|
|
for i := 1; i <= want; i++ {
|
|
data = append(data, i)
|
|
}
|
|
for i := 0; i < 10; i++ {
|
|
index := aggfuncs.PercentileForTesting(data, 100)
|
|
require.Equal(t, want, data[index])
|
|
}
|
|
}
|