github.com/XiaoMi/Gaea@v1.2.5/parser/tidb-types/fsp_test.go (about)

     1  // Copyright 2019 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package types
    15  
    16  import (
    17  	"strconv"
    18  	"testing"
    19  
    20  	. "github.com/pingcap/check"
    21  )
    22  
    23  func Test(t *testing.T) {
    24  	TestingT(t)
    25  }
    26  
    27  var _ = Suite(&FspTest{})
    28  
    29  type FspTest struct{}
    30  
    31  func (s *FspTest) TestCheckFsp(c *C) {
    32  	c.Parallel()
    33  	obtained, err := CheckFsp(UnspecifiedFsp)
    34  	c.Assert(obtained, Equals, DefaultFsp)
    35  	c.Assert(err, IsNil)
    36  
    37  	obtained, err = CheckFsp(-2019)
    38  	c.Assert(obtained, Equals, DefaultFsp)
    39  	c.Assert(err, ErrorMatches, "Invalid fsp -2019")
    40  
    41  	obtained, err = CheckFsp(MinFsp - 4294967296)
    42  	c.Assert(obtained, Equals, DefaultFsp)
    43  	c.Assert(err, ErrorMatches, "Invalid fsp "+strconv.Itoa(MinFsp-4294967296))
    44  
    45  	// UnspecifiedFsp
    46  	obtained, err = CheckFsp(-1)
    47  	c.Assert(obtained, Equals, DefaultFsp)
    48  	c.Assert(err, IsNil)
    49  
    50  	obtained, err = CheckFsp(MaxFsp + 1)
    51  	c.Assert(obtained, Equals, DefaultFsp)
    52  	c.Assert(err, ErrorMatches, "Invalid fsp "+strconv.Itoa(MaxFsp+1))
    53  
    54  	obtained, err = CheckFsp(MaxFsp + 2019)
    55  	c.Assert(obtained, Equals, DefaultFsp)
    56  	c.Assert(err, ErrorMatches, "Invalid fsp "+strconv.Itoa(MaxFsp+2019))
    57  
    58  	obtained, err = CheckFsp(MaxFsp + 4294967296)
    59  	c.Assert(obtained, Equals, DefaultFsp)
    60  	c.Assert(err, ErrorMatches, "Invalid fsp "+strconv.Itoa(MaxFsp+4294967296))
    61  
    62  	obtained, err = CheckFsp((MaxFsp + MinFsp) / 2)
    63  	c.Assert(obtained, Equals, (MaxFsp+MinFsp)/2)
    64  	c.Assert(err, IsNil)
    65  
    66  	obtained, err = CheckFsp(5)
    67  	c.Assert(obtained, Equals, 5)
    68  	c.Assert(err, IsNil)
    69  }
    70  
    71  func (s *FspTest) TestParseFrac(c *C) {
    72  	c.Parallel()
    73  	obtained, overflow, err := ParseFrac("", 5)
    74  	c.Assert(obtained, Equals, 0)
    75  	c.Assert(overflow, Equals, false)
    76  	c.Assert(err, IsNil)
    77  
    78  	obtained, overflow, err = ParseFrac("999", 200)
    79  	c.Assert(obtained, Equals, 0)
    80  	c.Assert(overflow, Equals, false)
    81  	c.Assert(err, ErrorMatches, "Invalid fsp .*")
    82  
    83  	obtained, overflow, err = ParseFrac("NotNum", MaxFsp)
    84  	c.Assert(obtained, Equals, 0)
    85  	c.Assert(overflow, Equals, false)
    86  	c.Assert(err, ErrorMatches, "strconv.ParseInt:.*")
    87  
    88  	obtained, overflow, err = ParseFrac("1235", 6)
    89  	c.Assert(obtained, Equals, 123500)
    90  	c.Assert(overflow, Equals, false)
    91  	c.Assert(err, IsNil)
    92  
    93  	obtained, overflow, err = ParseFrac("123456", 4)
    94  	c.Assert(obtained, Equals, 123500)
    95  	c.Assert(overflow, Equals, false)
    96  	c.Assert(err, IsNil)
    97  
    98  	// 1236 round 3 -> 124 -> 124000
    99  	obtained, overflow, err = ParseFrac("1236", 3)
   100  	c.Assert(obtained, Equals, 124000)
   101  	c.Assert(overflow, Equals, false)
   102  	c.Assert(err, IsNil)
   103  
   104  	// 03123 round 2 -> 3 -> 30000
   105  	obtained, overflow, err = ParseFrac("0312", 2)
   106  	c.Assert(obtained, Equals, 30000)
   107  	c.Assert(overflow, Equals, false)
   108  	c.Assert(err, IsNil)
   109  
   110  	// 999 round 2 -> 100 -> overflow
   111  	obtained, overflow, err = ParseFrac("999", 2)
   112  	c.Assert(obtained, Equals, 0)
   113  	c.Assert(overflow, Equals, true)
   114  	c.Assert(err, IsNil)
   115  }
   116  
   117  func (s *FspTest) TestAlignFrac(c *C) {
   118  	c.Parallel()
   119  	obtained := alignFrac("100", 6)
   120  	c.Assert(obtained, Equals, "100000")
   121  	obtained = alignFrac("10000000000", 6)
   122  	c.Assert(obtained, Equals, "10000000000")
   123  }