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test_support.go
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test_support.go
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/* Test datastore for testing datastore and other packages. */
package datastore
import (
"log"
"sync"
"github.com/janelia-flyem/dvid/dvid"
"github.com/janelia-flyem/dvid/storage"
)
type testStoreT struct {
sync.Mutex
engines map[storage.Alias]storage.TestableEngine
backend *storage.Backend
}
var (
testStore = testStoreT{}
)
// NewTestRepo returns a new datastore.Repo suitable for testing.
func NewTestRepo() (dvid.UUID, dvid.VersionID) {
uuid, err := NewRepo("testRepo", "A test repository", nil, "foobar")
if err != nil {
log.Fatalf("Unable to create new testing repo: %v\n", err)
}
versionID, err := VersionFromUUID(uuid)
if err != nil {
log.Fatalf("Unable to get version ID from repo root UUID %s\n", uuid)
}
return uuid, versionID
}
func openStores(create bool, datamap ...DataStorageMap) {
if len(datamap) > 1 {
log.Fatalf("can't have more than one data mapping in opening stores")
}
dvid.Infof("Opening test datastore. Create = %v\n", create)
if create {
var err error
if len(datamap) == 1 {
testStore.engines, testStore.backend, err = storage.GetTestableBackend(datamap[0].KVStores, datamap[0].LogStores)
} else {
testStore.engines, testStore.backend, err = storage.GetTestableBackend(nil, nil)
}
if err != nil {
log.Fatal(err)
}
}
initMetadata, err := storage.Initialize(dvid.Config{}, testStore.backend)
if err != nil {
log.Fatalf("Can't initialize test datastore: %v\n", err)
}
if err := Initialize(initMetadata, InstanceConfig{}); err != nil {
log.Fatalf("Can't initialize datastore management: %v\n", err)
}
dvid.Infof("Storage initialized. initMetadata = %v\n", initMetadata)
}
// DataStorageMap describes mappings from various instance and data type
// specifications to KV and Log stores.
type DataStorageMap struct {
KVStores storage.DataMap
LogStores storage.DataMap
}
func OpenTest(datamap ...DataStorageMap) {
testStore.Lock()
openStores(true, datamap...)
}
// CloseReopenTest forces close and then reopening of the datastore, useful for testing
// persistence. We only allow close/reopen when all tests not avaiting close/reopen are finished.
func CloseReopenTest(datamap ...DataStorageMap) {
dvid.Infof("Closing test datastore for reopen test...\n")
storage.Shutdown()
dvid.Infof("Reopening test datastore...\n")
openStores(false, datamap...)
}
func CloseTest() {
Shutdown()
for alias, engine := range testStore.engines {
storeConfig := testStore.backend.Stores[alias]
engine.Delete(storeConfig)
dvid.Infof("Deleted test engine %q with backend %q\n", engine, storeConfig)
}
testStore.Unlock()
}