Golang datastore.OpenTest函数代码示例

// Make sure new keyvalue data have different IDs.
func TestNewKeyvalueDifferent(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()

	// Add data
	config := dvid.NewConfig()
	dataservice1, err := datastore.NewData(uuid, kvtype, "instance1", config)
	if err != nil {
		t.Errorf("Error creating new keyvalue instance: %v\n", err)
	}
	kv1, ok := dataservice1.(*Data)
	if !ok {
		t.Errorf("Returned new data instance 1 is not keyvalue.Data\n")
	}
	if kv1.DataName() != "instance1" {
		t.Errorf("New keyvalue data instance name set incorrectly: %q != %q\n",
			kv1.DataName(), "instance1")
	}

	dataservice2, err := datastore.NewData(uuid, kvtype, "instance2", config)
	if err != nil {
		t.Errorf("Error creating new keyvalue instance: %v\n", err)
	}
	kv2, ok := dataservice2.(*Data)
	if !ok {
		t.Errorf("Returned new data instance 2 is not keyvalue.Data\n")
	}

	if kv1.InstanceID() == kv2.InstanceID() {
		t.Errorf("Instance IDs should be different: %d == %d\n",
			kv1.InstanceID(), kv2.InstanceID())
	}
}

func TestLabelblkDirectAPI(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, versionID := initTestRepo()
	labels := newDataInstance(uuid, t, "mylabels")
	labelsCtx := datastore.NewVersionedCtx(labels, versionID)

	// Create a fake block-aligned label volume
	offset := dvid.Point3d{32, 0, 64}
	size := dvid.Point3d{96, 64, 160}
	subvol := dvid.NewSubvolume(offset, size)
	data := makeVolume(offset, size)

	// Store it into datastore at root
	v, err := labels.NewVoxels(subvol, data)
	if err != nil {
		t.Fatalf("Unable to make new labels Voxels: %v\n", err)
	}
	if err = labels.IngestVoxels(versionID, 1, v, ""); err != nil {
		t.Errorf("Unable to put labels for %s: %v\n", labelsCtx, err)
	}
	if v.NumVoxels() != int64(len(data))/8 {
		t.Errorf("# voxels (%d) after PutVoxels != # original voxels (%d)\n",
			v.NumVoxels(), int64(len(data))/8)
	}

	// Read the stored image
	v2, err := labels.NewVoxels(subvol, nil)
	if err != nil {
		t.Errorf("Unable to make new labels ExtHandler: %v\n", err)
	}
	if err = labels.GetVoxels(versionID, v2, ""); err != nil {
		t.Errorf("Unable to get voxels for %s: %v\n", labelsCtx, err)
	}

	// Make sure the retrieved image matches the original
	if v.Stride() != v2.Stride() {
		t.Errorf("Stride in retrieved subvol incorrect\n")
	}
	if v.Interpolable() != v2.Interpolable() {
		t.Errorf("Interpolable bool in retrieved subvol incorrect\n")
	}
	if !reflect.DeepEqual(v.Size(), v2.Size()) {
		t.Errorf("Size in retrieved subvol incorrect: %s vs expected %s\n",
			v2.Size(), v.Size())
	}
	if v.NumVoxels() != v2.NumVoxels() {
		t.Errorf("# voxels in retrieved is different: %d vs expected %d\n",
			v2.NumVoxels(), v.NumVoxels())
	}
	byteData := v2.Data()

	for i := int64(0); i < v2.NumVoxels()*8; i++ {
		if byteData[i] != data[i] {
			t.Logf("Size of data: %d bytes from GET, %d bytes in PUT\n", len(data), len(data))
			t.Fatalf("GET subvol (%d) != PUT subvol (%d) @ uint64 #%d", byteData[i], data[i], i)
		}
	}
}

// Make sure new labelgraph data have different IDs.
func TestNewLabelgraphDifferent(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()

	// Add data
	config := dvid.NewConfig()
	dataservice1, err := datastore.NewData(uuid, dtype, "lg1", config)
	if err != nil {
		t.Errorf("Error creating new labelgraph instance 1: %v\n", err)
	}
	data1, ok := dataservice1.(*Data)
	if !ok {
		t.Errorf("Returned new data instance 1 is not labelgraph.Data\n")
	}
	dataservice2, err := datastore.NewData(uuid, dtype, "lg2", config)
	if err != nil {
		t.Errorf("Error creating new labelgraph instance 2: %v\n", err)
	}
	data2, ok := dataservice2.(*Data)
	if !ok {
		t.Errorf("Returned new data instance 2 is not labelgraph.Data\n")
	}
	if data1.InstanceID() == data2.InstanceID() {
		t.Errorf("Instance IDs should be different: %d == %d\n",
			data1.InstanceID(), data2.InstanceID())
	}
}

func TestROICreateAndSerialize(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()

	// Add data
	config := dvid.NewConfig()
	dataservice1, err := datastore.NewData(uuid, roitype, "myroi", config)
	if err != nil {
		t.Errorf("Error creating new roi instance: %v\n", err)
	}
	roi1, ok := dataservice1.(*Data)
	if !ok {
		t.Errorf("Returned new data instance 1 is not roi.Data\n")
	}
	if roi1.DataName() != "myroi" {
		t.Errorf("New roi data instance name set incorrectly: %q != %q\n",
			roi1.DataName(), "myroi")
	}

	config.Set("BlockSize", "15,16,17")
	dataservice2, err := datastore.NewData(uuid, roitype, "myroi2", config)
	if err != nil {
		t.Errorf("Error creating new roi instance: %v\n", err)
	}
	roi2, ok := dataservice2.(*Data)
	if !ok {
		t.Errorf("Returned new data instance 2 is not roi.Data\n")
	}

	if roi1.InstanceID() == roi2.InstanceID() {
		t.Errorf("Instance IDs should be different: %d == %d\n",
			roi1.InstanceID(), roi2.InstanceID())
	}

	// Test persistence of storage.
	roi2.MinZ = 13
	roi2.MaxZ = 3098
	gobBytes, err := roi2.GobEncode()
	if err != nil {
		t.Fatalf("Could not Gob encode roi: %v\n", err)
	}

	var received Data
	if err = received.GobDecode(gobBytes); err != nil {
		t.Fatalf("Could not decode Gob-encoded roi: %v\n", err)
	}

	if !roi2.Data.Equals(received.Data) {
		t.Errorf("ROI base Data has bad roundtrip:\nOriginal:\n%v\nReceived:\n%v\n",
			*(roi2.Data), *(received.Data))
	}

	if !reflect.DeepEqual(roi2.Properties, received.Properties) {
		t.Errorf("ROI extended properties has bad roundtrip:\nOriginal:\n%v\nReceived:\n%v\n",
			roi2.Properties, received.Properties)
	}
}

func TestKeyvalueRequests(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, versionID := initTestRepo()

	testRequest(t, uuid, versionID, "mykeyvalue")
}

func TestFloatInstanceCreation(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := datastore.NewTestRepo()

	// Create new voxels instance with optional parameters
	name := "weights"
	metadata := fmt.Sprintf(`{
		"typename": "float32blk",
		"dataname": %q,
		"blocksize": "64,43,28",
		"VoxelSize": "13.1, 14.2, 15.3",
		"VoxelUnits": "picometers,nanometers,microns"
	}`, name)
	apiStr := fmt.Sprintf("%srepo/%s/instance", server.WebAPIPath, uuid)
	server.TestHTTP(t, "POST", apiStr, bytes.NewBufferString(metadata))

	// Get metadata and make sure optional settings have been set.
	apiStr = fmt.Sprintf("%snode/%s/%s/info", server.WebAPIPath, uuid, name)
	result := server.TestHTTP(t, "GET", apiStr, nil)
	var parsed = struct {
		Base struct {
			TypeName, Name string
		}
		Extended struct {
			BlockSize  dvid.Point3d
			VoxelSize  dvid.NdFloat32
			VoxelUnits dvid.NdString
		}
	}{}
	if err := json.Unmarshal(result, &parsed); err != nil {
		t.Fatalf("Error parsing JSON response of new instance metadata: %v\n", err)
	}
	if parsed.Base.Name != name {
		t.Errorf("Parsed new instance has unexpected name: %s != %s (expected)\n",
			parsed.Base.Name, name)
	}
	if parsed.Base.TypeName != "float32blk" {
		t.Errorf("Parsed new instance has unexpected type name: %s != uint8blk (expected)\n",
			parsed.Base.TypeName)
	}
	if !parsed.Extended.BlockSize.Equals(dvid.Point3d{64, 43, 28}) {
		t.Errorf("Bad block size in new uint8blk instance: %s\n", parsed.Extended.BlockSize)
	}
	if !parsed.Extended.VoxelSize.Equals(dvid.NdFloat32{13.1, 14.2, 15.3}) {
		t.Errorf("Bad voxel size in new uint8blk instance: %s\n", parsed.Extended.VoxelSize)
	}
	if parsed.Extended.VoxelUnits[0] != "picometers" {
		t.Errorf("Got %q for X voxel units, not picometers\n", parsed.Extended.VoxelUnits[0])
	}
	if parsed.Extended.VoxelUnits[1] != "nanometers" {
		t.Errorf("Got %q for X voxel units, not picometers\n", parsed.Extended.VoxelUnits[0])
	}
	if parsed.Extended.VoxelUnits[2] != "microns" {
		t.Errorf("Got %q for X voxel units, not picometers\n", parsed.Extended.VoxelUnits[0])
	}
}

func TestRequests(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()

	config := dvid.NewConfig()
	dataservice, err := datastore.NewData(uuid, syntype, "mysynapses", config)
	if err != nil {
		t.Fatalf("Error creating new data instance: %v\n", err)
	}
	data, ok := dataservice.(*Data)
	if !ok {
		t.Fatalf("Returned new data instance is not synapse.Data\n")
	}

	// PUT first batch of synapses
	testJSON, err := json.Marshal(testData)
	if err != nil {
		t.Fatal(err)
	}
	url1 := fmt.Sprintf("%snode/%s/%s/elements", server.WebAPIPath, uuid, data.DataName())
	server.TestHTTP(t, "POST", url1, strings.NewReader(string(testJSON)))

	// GET synapses back within superset bounding box and make sure all data is there.
	testResponse(t, testData, "%snode/%s/%s/elements/1000_1000_1000/0_0_0", server.WebAPIPath, uuid, data.DataName())

	// Test subset GET
	testResponse(t, expected3, "%snode/%s/%s/elements/5_5_5/126_60_97", server.WebAPIPath, uuid, data.DataName())

	// Test Tag 1
	tag := Tag("Synapse2")
	synapse2 := getTag(tag, testData)
	testResponse(t, synapse2, "%snode/%s/%s/tag/%s?relationships=true", server.WebAPIPath, uuid, data.DataName(), tag)

	// Test Tag 2
	tag2 := Tag("Zlt90")
	zlt90 := getTag(tag2, testData)
	testResponse(t, zlt90, "%snode/%s/%s/tag/%s?relationships=true", server.WebAPIPath, uuid, data.DataName(), tag2)

	// Test move
	url5 := fmt.Sprintf("%snode/%s/%s/move/127_63_99/127_64_100", server.WebAPIPath, uuid, data.DataName())
	server.TestHTTP(t, "POST", url5, nil)
	testResponse(t, afterMove, "%snode/%s/%s/elements/1000_1000_1000/0_0_0", server.WebAPIPath, uuid, data.DataName())

	// --- check tag
	synapse2 = getTag(tag, afterMove)
	testResponse(t, synapse2, "%snode/%s/%s/tag/%s?relationships=true", server.WebAPIPath, uuid, data.DataName(), tag)

	// Test delete
	url6 := fmt.Sprintf("%snode/%s/%s/element/127_64_100", server.WebAPIPath, uuid, data.DataName())
	server.TestHTTP(t, "DELETE", url6, nil)
	testResponse(t, afterDelete, "%snode/%s/%s/elements/1000_1000_1000/0_0_0", server.WebAPIPath, uuid, data.DataName())

	// --- check tag
	synapse2 = getTag(tag, afterDelete)
	testResponse(t, synapse2, "%snode/%s/%s/tag/%s?relationships=true", server.WebAPIPath, uuid, data.DataName(), tag)
}

func TestLog(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid := createRepo(t)

	// Post a log
	payload := bytes.NewBufferString(`{"log": ["line1", "line2", "some more stuff in a line"]}`)
	apiStr := fmt.Sprintf("%snode/%s/log", WebAPIPath, uuid)
	TestHTTP(t, "POST", apiStr, payload)

	// Verify it was saved.
	r := TestHTTP(t, "GET", apiStr, nil)
	jsonResp := make(map[string][]string)
	if err := json.Unmarshal(r, &jsonResp); err != nil {
		t.Fatalf("Unable to unmarshal log response: %s\n", string(r))
	}
	if len(jsonResp) != 1 {
		t.Errorf("Bad log return: %s\n", string(r))
	}
	data, ok := jsonResp["log"]
	if !ok {
		t.Fatalf("No 'log' data returned: %s\n", string(r))
	}
	if len(data) != 3 {
		t.Fatalf("Got wrong # of lines in log: %v\n", data)
	}
	testLog(t, data[0], "line1")
	testLog(t, data[1], "line2")
	testLog(t, data[2], "some more stuff in a line")

	// Add some more to log
	payload = bytes.NewBufferString(`{"log": ["line4", "line5"]}`)
	apiStr = fmt.Sprintf("%snode/%s/log", WebAPIPath, uuid)
	TestHTTP(t, "POST", apiStr, payload)

	// Verify it was appended.
	r = TestHTTP(t, "GET", apiStr, nil)
	jsonResp = make(map[string][]string)
	if err := json.Unmarshal(r, &jsonResp); err != nil {
		t.Fatalf("Unable to unmarshal log response: %s\n", string(r))
	}
	if len(jsonResp) != 1 {
		t.Errorf("Bad log return: %s\n", string(r))
	}
	data, ok = jsonResp["log"]
	if !ok {
		t.Fatalf("No 'log' data returned: %s\n", string(r))
	}
	if len(data) != 5 {
		t.Errorf("Got wrong # of lines in log: %v\n", data)
	}
	testLog(t, data[3], "line4")
	testLog(t, data[4], "line5")
}

func TestBasic(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()

	config := dvid.NewConfig()
	_, err := datastore.NewData(uuid, dtype, "instance1", config)
	if err != nil {
		t.Errorf("Error creating new multichan16 instance: %v\n", err)
	}
}

func TestROIPartition(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	// Create the ROI dataservice.
	uuid, versionID := initTestRepo()

	config := dvid.NewConfig()
	dataservice, err := datastore.NewData(uuid, roitype, "roi", config)
	if err != nil {
		t.Errorf("Error creating new roi instance: %v\n", err)
	}
	data, ok := dataservice.(*Data)
	if !ok {
		t.Errorf("Returned new data instance is not roi.Data\n")
	}

	// PUT an ROI
	roiRequest := fmt.Sprintf("%snode/%s/%s/roi", server.WebAPIPath, uuid, data.DataName())
	req, err := http.NewRequest("POST", roiRequest, getSpansJSON(testSpans))
	if err != nil {
		t.Errorf("Unsuccessful POST request (%s): %v\n", roiRequest, err)
	}
	ctx := datastore.NewVersionedCtx(data, versionID)
	w := httptest.NewRecorder()
	data.ServeHTTP(uuid, ctx, w, req)
	if w.Code != http.StatusOK {
		t.Errorf("Bad server response roi POST, status %s, for roi %q\n", w.Code, data.DataName())
	}

	// Request the standard subvolume partitioning
	partitionReq := fmt.Sprintf("%snode/%s/%s/partition?batchsize=5&optimized=true", server.WebAPIPath, uuid,
		data.DataName())
	req, err = http.NewRequest("GET", partitionReq, nil)
	if err != nil {
		t.Errorf("Unsuccessful GET request (%s): %v\n", partitionReq, err)
	}
	w = httptest.NewRecorder()
	data.ServeHTTP(uuid, ctx, w, req)
	if w.Code != http.StatusOK {
		t.Errorf("Bad server response roi GET, status %s, for roi %q\n", w.Code, data.DataName())
	}
	var subvolJSON, expectedJSON interface{}
	response := w.Body.Bytes()
	if err := json.Unmarshal(response, &subvolJSON); err != nil {
		t.Errorf("Can't unmarshal JSON: %s\n", w.Body.Bytes())
	}
	json.Unmarshal([]byte(expectedPartition), &expectedJSON)
	if !reflect.DeepEqual(subvolJSON, expectedJSON) {
		t.Errorf("Error doing optimized subvolume partitioning.  Got bad result:\n%s\n",
			string(response))
	}
}

// Test added after error in getting two paths to the same ancestor k/v after merge.
func TestDiamondGetOnMerge(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()

	config := dvid.NewConfig()
	dataservice, err := datastore.NewData(uuid, kvtype, "mergetest", config)
	if err != nil {
		t.Fatalf("Error creating new keyvalue instance: %v\n", err)
	}
	data, ok := dataservice.(*Data)
	if !ok {
		t.Fatalf("Returned new data instance is not roi.Data\n")
	}

	// PUT a value
	key1 := "mykey"
	value1 := "some stuff"
	key1req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid, data.DataName(), key1)
	server.TestHTTP(t, "POST", key1req, strings.NewReader(value1))

	if err = datastore.Commit(uuid, "my commit msg", []string{"stuff one", "stuff two"}); err != nil {
		t.Errorf("Unable to lock root node %s: %v\n", uuid, err)
	}
	uuid2, err := datastore.NewVersion(uuid, "first child", nil)
	if err != nil {
		t.Fatalf("Unable to create 1st child off root %s: %v\n", uuid, err)
	}
	if err = datastore.Commit(uuid2, "first child", nil); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid2, err)
	}
	uuid3, err := datastore.NewVersion(uuid, "second child", nil)
	if err != nil {
		t.Fatalf("Unable to create 2nd child off root %s: %v\n", uuid, err)
	}
	if err = datastore.Commit(uuid3, "second child", nil); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid3, err)
	}

	child, err := datastore.Merge([]dvid.UUID{uuid2, uuid3}, "merging stuff", datastore.MergeConflictFree)
	if err != nil {
		t.Errorf("Error doing merge: %v\n", err)
	}

	// We should be able to see just the original uuid value of the k/v
	childreq := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, child, data.DataName(), key1)
	returnValue := server.TestHTTP(t, "GET", childreq, nil)
	if string(returnValue) != value1 {
		t.Errorf("Error on merged child, key %q: expected %q, got %q\n", key1, value1, string(returnValue))
	}
}

func TestBlockAPI(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()
	grayscale := makeGrayscale(uuid, t, "grayscale")

	// construct random blocks of data.
	numBlockBytes := int32(grayscale.BlockSize().Prod())
	testBlocks := 1001
	var blockData []byte
	for i := 0; i < testBlocks; i++ {
		blockData = append(blockData, dvid.RandomBytes(numBlockBytes)...)
	}

	// set start of span
	x := rand.Int31()
	y := rand.Int31()
	z := rand.Int31()

	// Test uncompressed roundtrip

	// send the blocks
	blockReq := fmt.Sprintf("%snode/%s/grayscale/blocks/%d_%d_%d/%d", server.WebAPIPath, uuid, x, y, z, testBlocks)
	server.TestHTTP(t, "POST", blockReq, bytes.NewBuffer(blockData))

	// read same span of blocks
	returnedData := server.TestHTTP(t, "GET", blockReq, nil)

	// make sure blocks are same
	totBytes := testBlocks * int(numBlockBytes)
	if len(returnedData) != totBytes {
		t.Errorf("Returned %d bytes, expected %d bytes", len(returnedData), totBytes)
	}
	if !reflect.DeepEqual(returnedData, blockData) {
		t.Errorf("Returned block data != original block data\n")
	}

	// We should get blank blocks at different z
	z += 1
	blockReq = fmt.Sprintf("%snode/%s/grayscale/blocks/%d_%d_%d/%d", server.WebAPIPath, uuid, x, y, z, testBlocks)
	returnedData = server.TestHTTP(t, "GET", blockReq, nil)
	if len(returnedData) != totBytes {
		t.Errorf("Returned %d bytes, expected %d bytes", len(returnedData), totBytes)
	}
	for i, b := range returnedData {
		if b != 0 {
			t.Fatalf("Expected 0 at returned byte %d, got %d instead.\n", i, b)
		}
	}
}

func TestCommitAndBranch(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	apiStr := fmt.Sprintf("%srepos", server.WebAPIPath)
	r := server.TestHTTP(t, "POST", apiStr, nil)
	var jsonResp map[string]interface{}

	if err := json.Unmarshal(r, &jsonResp); err != nil {
		t.Fatalf("Unable to unmarshal repo creation response: %s\n", string(r))
	}
	v, ok := jsonResp["root"]
	if !ok {
		t.Fatalf("No 'root' metadata returned: %s\n", string(r))
	}
	uuidStr, ok := v.(string)
	if !ok {
		t.Fatalf("Couldn't cast returned 'root' data (%v) into string.\n", v)
	}
	uuid := dvid.UUID(uuidStr)

	// Shouldn't be able to create branch on open node.
	branchReq := fmt.Sprintf("%snode/%s/branch", server.WebAPIPath, uuid)
	server.TestBadHTTP(t, "POST", branchReq, nil)

	// Add a keyvalue instance.
	server.CreateTestInstance(t, uuid, "keyvalue", "mykv", dvid.Config{})

	// Commit it.
	payload := bytes.NewBufferString(`{"note": "This is my test commit", "log": ["line1", "line2", "some more stuff in a line"]}`)
	apiStr = fmt.Sprintf("%snode/%s/commit", server.WebAPIPath, uuid)
	server.TestHTTP(t, "POST", apiStr, payload)

	// Make sure committed nodes can only be read.
	// We shouldn't be able to write to keyvalue..
	keyReq := fmt.Sprintf("%snode/%s/mykv/key/foo", server.WebAPIPath, uuid)
	server.TestBadHTTP(t, "POST", keyReq, bytes.NewBufferString("some data"))

	// Should be able to create branch now that we've committed parent.
	respData := server.TestHTTP(t, "POST", branchReq, nil)
	resp := struct {
		Child dvid.UUID `json:"child"`
	}{}
	if err := json.Unmarshal(respData, &resp); err != nil {
		t.Errorf("Expected 'child' JSON response.  Got %s\n", string(respData))
	}

	// We should be able to write to that keyvalue now in the child.
	keyReq = fmt.Sprintf("%snode/%s/mykv/key/foo", server.WebAPIPath, resp.Child)
	server.TestHTTP(t, "POST", keyReq, bytes.NewBufferString("some data"))
}

func TestDeleteInstance(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid := createRepo(t)

	// Shouldn't be able to delete instance without "imsure"
	delReq := fmt.Sprintf("%srepo/%s/%s", WebAPIPath, uuid, "absent-name")
	TestBadHTTP(t, "DELETE", delReq, nil)

	// Shouldn't be able to delete an instance that doesn't exist.
	delReq = fmt.Sprintf("%srepo/%s/%s?imsure=true", WebAPIPath, uuid, "absent-name")
	TestBadHTTP(t, "DELETE", delReq, nil)
}

func TestReloadMetadata(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := datastore.NewTestRepo()

	// Add data instances
	var config dvid.Config
	server.CreateTestInstance(t, uuid, "keyvalue", "foo", config)
	server.CreateTestInstance(t, uuid, "labelblk", "labels", config)
	server.CreateTestInstance(t, uuid, "roi", "someroi", config)

	// Reload the metadata
	apiStr := fmt.Sprintf("%sserver/reload-metadata", server.WebAPIPath)
	server.TestHTTP(t, "POST", apiStr, nil)

	// Make sure repo UUID still there
	jsonStr, err := datastore.MarshalJSON()
	if err != nil {
		t.Fatalf("can't get repos JSON: %v\n", err)
	}
	var jsonResp map[string](map[string]interface{})

	if err := json.Unmarshal(jsonStr, &jsonResp); err != nil {
		t.Fatalf("Unable to unmarshal repos info response: %s\n", jsonStr)
	}
	if len(jsonResp) != 1 {
		t.Errorf("reloaded repos had more than one repo: %v\n", jsonResp)
	}
	for k := range jsonResp {
		if dvid.UUID(k) != uuid {
			t.Fatalf("Expected uuid %s, got %s.  Full JSON:\n%v\n", uuid, k, jsonResp)
		}
	}

	// Make sure the data instances are still there.
	_, err = datastore.GetDataByUUIDName(uuid, "foo")
	if err != nil {
		t.Errorf("Couldn't get keyvalue data instance after reload\n")
	}
	_, err = datastore.GetDataByUUIDName(uuid, "labels")
	if err != nil {
		t.Errorf("Couldn't get labelblk data instance after reload\n")
	}
	_, err = datastore.GetDataByUUIDName(uuid, "someroi")
	if err != nil {
		t.Errorf("Couldn't get roi data instance after reload\n")
	}
}