82 lines
2.0 KiB
Go
82 lines
2.0 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 codec
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import (
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/sessionctx/variable"
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"github.com/pingcap/tidb/util/testleak"
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"github.com/pingcap/tidb/util/types"
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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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b := EncodeDecimal([]byte{}, types.NewDatum(v))
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_, d, err := DecodeDecimal(b)
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c.Assert(err, IsNil)
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c.Assert(v.Compare(d.GetMysqlDecimal()), 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 := EncodeDecimal([]byte{}, d1)
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_, d2, err := DecodeDecimal(b)
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c.Assert(err, IsNil)
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sc := new(variable.StatementContext)
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cmp, err := d1.CompareDatum(sc, d2)
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c.Assert(err, IsNil)
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c.Assert(cmp, Equals, 0)
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c.Assert(d1.GetMysqlDecimal().String(), Equals, d2.GetMysqlDecimal().String())
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}
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