127 lines
2.9 KiB
Go
127 lines
2.9 KiB
Go
package db0202
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import (
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"bytes"
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"os"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestKVBasic(t *testing.T) {
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kv := KV{}
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kv.log.FileName = ".test_db"
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defer os.Remove(kv.log.FileName)
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os.Remove(kv.log.FileName)
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err := kv.Open()
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assert.Nil(t, err)
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defer kv.Close()
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updated, err := kv.Set([]byte("k1"), []byte("v1"))
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assert.True(t, updated && err == nil)
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val, ok, err := kv.Get([]byte("k1"))
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assert.True(t, string(val) == "v1" && ok && err == nil)
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_, ok, err = kv.Get([]byte("xxx"))
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assert.True(t, !ok && err == nil)
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updated, err = kv.Del([]byte("xxx"))
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assert.True(t, !updated && err == nil)
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updated, err = kv.Del([]byte("k1"))
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assert.True(t, updated && err == nil)
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_, ok, err = kv.Get([]byte("xxx"))
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assert.True(t, !ok && err == nil)
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updated, err = kv.Set([]byte("k2"), []byte("v2"))
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assert.True(t, updated && err == nil)
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// reopen
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kv.Close()
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err = kv.Open()
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assert.Nil(t, err)
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_, ok, err = kv.Get([]byte("k1"))
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assert.True(t, !ok && err == nil)
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val, ok, err = kv.Get([]byte("k2"))
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assert.True(t, string(val) == "v2" && ok && err == nil)
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}
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func TestKVRecovery(t *testing.T) {
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kv := KV{}
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kv.log.FileName = ".test_db"
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defer os.Remove(kv.log.FileName)
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prepare := func() {
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os.Remove(kv.log.FileName)
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err := kv.Open()
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assert.Nil(t, err)
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defer kv.Close()
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updated, err := kv.Set([]byte("k1"), []byte("v1"))
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assert.True(t, updated && err == nil)
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updated, err = kv.Set([]byte("k2"), []byte("v2"))
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assert.True(t, updated && err == nil)
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}
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prepare()
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// simulate truncated log
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fp, _ := os.OpenFile(kv.log.FileName, os.O_RDWR, 0o644)
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st, _ := fp.Stat()
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fp.Truncate(st.Size() - 1)
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fp.Close()
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// reopen
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err := kv.Open()
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assert.Nil(t, err)
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// test
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val, ok, err := kv.Get([]byte("k1"))
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assert.True(t, string(val) == "v1" && ok && err == nil)
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_, ok, err = kv.Get([]byte("k2")) // bad
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assert.True(t, !ok && err == nil)
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kv.Close()
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prepare()
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// simulate bad checksum
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fp, _ = os.OpenFile(kv.log.FileName, os.O_RDWR, 0o644)
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st, _ = fp.Stat()
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fp.WriteAt([]byte{0}, st.Size()-1)
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fp.Close()
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// reopen
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err = kv.Open()
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assert.Nil(t, err)
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// test
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val, ok, err = kv.Get([]byte("k1"))
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assert.True(t, string(val) == "v1" && ok && err == nil)
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_, ok, err = kv.Get([]byte("k2")) // bad
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assert.True(t, !ok && err == nil)
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kv.Close()
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}
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func TestEntryEncode(t *testing.T) {
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ent := Entry{key: []byte("k1"), val: []byte("xxx")}
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data := []byte{0xe9, 0xec, 0x4d, 0x9e, 2, 0, 0, 0, 3, 0, 0, 0, 0, 'k', '1', 'x', 'x', 'x'}
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assert.Equal(t, data, ent.Encode())
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decoded := Entry{}
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err := decoded.Decode(bytes.NewBuffer(data))
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assert.Nil(t, err)
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assert.Equal(t, ent, decoded)
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ent = Entry{key: []byte("k1"), deleted: true}
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data = []byte{0x4c, 0xd0, 0xfe, 0xe5, 2, 0, 0, 0, 0, 0, 0, 0, 1, 'k', '1'}
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assert.Equal(t, data, ent.Encode())
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decoded = Entry{}
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err = decoded.Decode(bytes.NewBuffer(data))
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assert.Nil(t, err)
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assert.Equal(t, ent, decoded)
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}
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// QzBQWVJJOUhU https://trialofcode.org/
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