82 lines
2.1 KiB
Go
82 lines
2.1 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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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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 codec
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import (
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"testing"
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"github.com/pingcap/tidb/types"
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"github.com/stretchr/testify/require"
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)
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func TestDecimalCodec(t *testing.T) {
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inputs := []struct {
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Input float64
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}{
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{float64(123400)},
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{float64(1234)},
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{float64(12.34)},
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{float64(0.1234)},
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{float64(0.01234)},
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{float64(-0.1234)},
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{float64(-0.01234)},
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{float64(12.3400)},
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{float64(-12.34)},
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{float64(0.00000)},
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{float64(0)},
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{float64(-0.0)},
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{float64(-0.000)},
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}
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for _, input := range inputs {
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v := types.NewDecFromFloatForTest(input.Input)
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datum := types.NewDatum(v)
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b, err := EncodeDecimal([]byte{}, datum.GetMysqlDecimal(), datum.Length(), datum.Frac())
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require.NoError(t, err)
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_, d, prec, frac, err := DecodeDecimal(b)
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if datum.Length() != 0 {
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require.Equal(t, datum.Length(), prec)
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require.Equal(t, datum.Frac(), frac)
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} else {
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prec1, frac1 := datum.GetMysqlDecimal().PrecisionAndFrac()
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require.Equal(t, prec1, prec)
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require.Equal(t, frac1, frac)
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}
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require.NoError(t, err)
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require.Equal(t, 0, v.Compare(d))
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}
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}
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func TestFrac(t *testing.T) {
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inputs := []struct {
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Input *types.MyDecimal
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}{
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{types.NewDecFromInt(3)},
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{types.NewDecFromFloatForTest(0.03)},
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}
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for _, v := range inputs {
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var datum types.Datum
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datum.SetMysqlDecimal(v.Input)
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b, err := EncodeDecimal([]byte{}, datum.GetMysqlDecimal(), datum.Length(), datum.Frac())
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require.NoError(t, err)
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_, dec, _, _, err := DecodeDecimal(b)
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require.NoError(t, err)
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require.Equal(t, v.Input.String(), dec.String())
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}
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}
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