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89 lines
2.2 KiB
89 lines
2.2 KiB
// 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 codec
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import (
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/testleak"
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)
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var _ = Suite(&testDecimalSuite{})
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type testDecimalSuite struct {
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}
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func (s *testDecimalSuite) TestDecimalCodec(c *C) {
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defer testleak.AfterTest(c)()
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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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c.Assert(err, IsNil)
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_, d, prec, frac, err := DecodeDecimal(b)
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if datum.Length() != 0 {
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c.Assert(prec, Equals, datum.Length())
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c.Assert(frac, Equals, datum.Frac())
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} else {
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prec1, frac1 := datum.GetMysqlDecimal().PrecisionAndFrac()
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c.Assert(prec, Equals, prec1)
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c.Assert(frac, Equals, frac1)
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}
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c.Assert(err, IsNil)
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c.Assert(v.Compare(d), Equals, 0)
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}
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}
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func (s *testDecimalSuite) TestFrac(c *C) {
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defer testleak.AfterTest(c)()
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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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testFrac(c, v.Input)
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}
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}
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func testFrac(c *C, v *types.MyDecimal) {
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var d1 types.Datum
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d1.SetMysqlDecimal(v)
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b, err := EncodeDecimal([]byte{}, d1.GetMysqlDecimal(), d1.Length(), d1.Frac())
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c.Assert(err, IsNil)
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_, dec, _, _, err := DecodeDecimal(b)
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c.Assert(err, IsNil)
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c.Assert(dec.String(), Equals, v.String())
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}
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