github.com/whtcorpsinc/MilevaDB-Prod@v0.0.0-20211104133533-f57f4be3b597/causetstore/ekv/union_store_test.go (about)

     1  // Copyright 2020 WHTCORPS INC, 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 ekv
    15  
    16  import (
    17  	"context"
    18  
    19  	. "github.com/whtcorpsinc/check"
    20  	"github.com/whtcorpsinc/milevadb/soliton/testleak"
    21  )
    22  
    23  var _ = Suite(&testUnionStoreSuite{})
    24  
    25  type testUnionStoreSuite struct {
    26  	causetstore MemBuffer
    27  	us          UnionStore
    28  }
    29  
    30  func (s *testUnionStoreSuite) SetUpTest(c *C) {
    31  	s.causetstore = newMemDB()
    32  	s.us = NewUnionStore(&mockSnapshot{s.causetstore})
    33  }
    34  
    35  func (s *testUnionStoreSuite) TestGetSet(c *C) {
    36  	defer testleak.AfterTest(c)()
    37  	err := s.causetstore.Set([]byte("1"), []byte("1"))
    38  	c.Assert(err, IsNil)
    39  	v, err := s.us.Get(context.TODO(), []byte("1"))
    40  	c.Assert(err, IsNil)
    41  	c.Assert(v, BytesEquals, []byte("1"))
    42  	err = s.us.GetMemBuffer().Set([]byte("1"), []byte("2"))
    43  	c.Assert(err, IsNil)
    44  	v, err = s.us.Get(context.TODO(), []byte("1"))
    45  	c.Assert(err, IsNil)
    46  	c.Assert(v, BytesEquals, []byte("2"))
    47  	c.Assert(s.us.GetMemBuffer().Size(), Equals, 2)
    48  	c.Assert(s.us.GetMemBuffer().Len(), Equals, 1)
    49  }
    50  
    51  func (s *testUnionStoreSuite) TestDelete(c *C) {
    52  	defer testleak.AfterTest(c)()
    53  	err := s.causetstore.Set([]byte("1"), []byte("1"))
    54  	c.Assert(err, IsNil)
    55  	err = s.us.GetMemBuffer().Delete([]byte("1"))
    56  	c.Assert(err, IsNil)
    57  	_, err = s.us.Get(context.TODO(), []byte("1"))
    58  	c.Assert(IsErrNotFound(err), IsTrue)
    59  
    60  	err = s.us.GetMemBuffer().Set([]byte("1"), []byte("2"))
    61  	c.Assert(err, IsNil)
    62  	v, err := s.us.Get(context.TODO(), []byte("1"))
    63  	c.Assert(err, IsNil)
    64  	c.Assert(v, BytesEquals, []byte("2"))
    65  }
    66  
    67  func (s *testUnionStoreSuite) TestSeek(c *C) {
    68  	defer testleak.AfterTest(c)()
    69  	err := s.causetstore.Set([]byte("1"), []byte("1"))
    70  	c.Assert(err, IsNil)
    71  	err = s.causetstore.Set([]byte("2"), []byte("2"))
    72  	c.Assert(err, IsNil)
    73  	err = s.causetstore.Set([]byte("3"), []byte("3"))
    74  	c.Assert(err, IsNil)
    75  
    76  	iter, err := s.us.Iter(nil, nil)
    77  	c.Assert(err, IsNil)
    78  	checkIterator(c, iter, [][]byte{[]byte("1"), []byte("2"), []byte("3")}, [][]byte{[]byte("1"), []byte("2"), []byte("3")})
    79  
    80  	iter, err = s.us.Iter([]byte("2"), nil)
    81  	c.Assert(err, IsNil)
    82  	checkIterator(c, iter, [][]byte{[]byte("2"), []byte("3")}, [][]byte{[]byte("2"), []byte("3")})
    83  
    84  	err = s.us.GetMemBuffer().Set([]byte("4"), []byte("4"))
    85  	c.Assert(err, IsNil)
    86  	iter, err = s.us.Iter([]byte("2"), nil)
    87  	c.Assert(err, IsNil)
    88  	checkIterator(c, iter, [][]byte{[]byte("2"), []byte("3"), []byte("4")}, [][]byte{[]byte("2"), []byte("3"), []byte("4")})
    89  
    90  	err = s.us.GetMemBuffer().Delete([]byte("3"))
    91  	c.Assert(err, IsNil)
    92  	iter, err = s.us.Iter([]byte("2"), nil)
    93  	c.Assert(err, IsNil)
    94  	checkIterator(c, iter, [][]byte{[]byte("2"), []byte("4")}, [][]byte{[]byte("2"), []byte("4")})
    95  }
    96  
    97  func (s *testUnionStoreSuite) TestIterReverse(c *C) {
    98  	defer testleak.AfterTest(c)()
    99  	err := s.causetstore.Set([]byte("1"), []byte("1"))
   100  	c.Assert(err, IsNil)
   101  	err = s.causetstore.Set([]byte("2"), []byte("2"))
   102  	c.Assert(err, IsNil)
   103  	err = s.causetstore.Set([]byte("3"), []byte("3"))
   104  	c.Assert(err, IsNil)
   105  
   106  	iter, err := s.us.IterReverse(nil)
   107  	c.Assert(err, IsNil)
   108  	checkIterator(c, iter, [][]byte{[]byte("3"), []byte("2"), []byte("1")}, [][]byte{[]byte("3"), []byte("2"), []byte("1")})
   109  
   110  	iter, err = s.us.IterReverse([]byte("3"))
   111  	c.Assert(err, IsNil)
   112  	checkIterator(c, iter, [][]byte{[]byte("2"), []byte("1")}, [][]byte{[]byte("2"), []byte("1")})
   113  
   114  	err = s.us.GetMemBuffer().Set([]byte("0"), []byte("0"))
   115  	c.Assert(err, IsNil)
   116  	iter, err = s.us.IterReverse([]byte("3"))
   117  	c.Assert(err, IsNil)
   118  	checkIterator(c, iter, [][]byte{[]byte("2"), []byte("1"), []byte("0")}, [][]byte{[]byte("2"), []byte("1"), []byte("0")})
   119  
   120  	err = s.us.GetMemBuffer().Delete([]byte("1"))
   121  	c.Assert(err, IsNil)
   122  	iter, err = s.us.IterReverse([]byte("3"))
   123  	c.Assert(err, IsNil)
   124  	checkIterator(c, iter, [][]byte{[]byte("2"), []byte("0")}, [][]byte{[]byte("2"), []byte("0")})
   125  }
   126  
   127  func checkIterator(c *C, iter Iterator, keys [][]byte, values [][]byte) {
   128  	defer iter.Close()
   129  	c.Assert(len(keys), Equals, len(values))
   130  	for i, k := range keys {
   131  		v := values[i]
   132  		c.Assert(iter.Valid(), IsTrue)
   133  		c.Assert([]byte(iter.Key()), BytesEquals, k)
   134  		c.Assert(iter.Value(), BytesEquals, v)
   135  		c.Assert(iter.Next(), IsNil)
   136  	}
   137  	c.Assert(iter.Valid(), IsFalse)
   138  }