123 lines
2.8 KiB
Go
123 lines
2.8 KiB
Go
package store
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import (
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"io/ioutil"
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"os"
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"reflect"
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"testing"
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"time"
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"github.com/lbryio/lbry.go/v2/extras/errors"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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const cacheMaxBlobs = 3
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func getTestLRUStore() (*LRUStore, *MemStore) {
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m := NewMemStore()
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return NewLRUStore("test", m, 3), m
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}
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func TestLRUStore_Eviction(t *testing.T) {
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lru, mem := getTestLRUStore()
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b := []byte("x")
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err := lru.Put("one", b)
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require.NoError(t, err)
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err = lru.Put("two", b)
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require.NoError(t, err)
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err = lru.Put("three", b)
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require.NoError(t, err)
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err = lru.Put("four", b)
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require.NoError(t, err)
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err = lru.Put("five", b)
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require.NoError(t, err)
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assert.Equal(t, cacheMaxBlobs, len(mem.Debug()))
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for k, v := range map[string]bool{
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"one": false,
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"two": false,
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"three": true,
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"four": true,
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"five": true,
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"six": false,
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} {
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has, err := lru.Has(k)
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assert.NoError(t, err)
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assert.Equal(t, v, has)
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}
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lru.Get("three") // touch so it stays in cache
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lru.Put("six", b)
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assert.Equal(t, cacheMaxBlobs, len(mem.Debug()))
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for k, v := range map[string]bool{
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"one": false,
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"two": false,
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"three": true,
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"four": false,
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"five": true,
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"six": true,
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} {
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has, err := lru.Has(k)
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assert.NoError(t, err)
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assert.Equal(t, v, has)
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}
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err = lru.Delete("three")
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assert.NoError(t, err)
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err = lru.Delete("five")
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assert.NoError(t, err)
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err = lru.Delete("six")
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assert.NoError(t, err)
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assert.Equal(t, 0, len(mem.Debug()))
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}
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func TestLRUStore_UnderlyingBlobMissing(t *testing.T) {
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lru, mem := getTestLRUStore()
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hash := "hash"
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b := []byte("this is a blob of stuff")
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err := lru.Put(hash, b)
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require.NoError(t, err)
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err = mem.Delete(hash)
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require.NoError(t, err)
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// hash still exists in lru
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assert.True(t, lru.lru.Has(hash))
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blob, _, err := lru.Get(hash)
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assert.Nil(t, blob)
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assert.True(t, errors.Is(err, ErrBlobNotFound), "expected (%s) %s, got (%s) %s",
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reflect.TypeOf(ErrBlobNotFound).String(), ErrBlobNotFound.Error(),
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reflect.TypeOf(err).String(), err.Error())
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// lru.Get() removes hash if underlying store doesn't have it
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assert.False(t, lru.lru.Has(hash))
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}
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func TestLRUStore_loadExisting(t *testing.T) {
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tmpDir, err := ioutil.TempDir("", "reflector_test_*")
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require.NoError(t, err)
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defer os.RemoveAll(tmpDir)
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d := NewDiskStore(tmpDir, 2)
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hash := "hash"
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b := []byte("this is a blob of stuff")
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err = d.Put(hash, b)
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require.NoError(t, err)
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existing, err := d.list()
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require.NoError(t, err)
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require.Equal(t, 1, len(existing), "blob should exist in cache")
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assert.Equal(t, hash, existing[0])
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lru := NewLRUStore("test", d, 3) // lru should load existing blobs when it's created
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time.Sleep(100 * time.Millisecond) // async load so let's wait...
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has, err := lru.Has(hash)
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require.NoError(t, err)
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assert.True(t, has, "hash should be loaded from disk store but it's not")
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}
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