tempo/tempodb/backend/local/local_test.go at 3b77daf56714c6fa027d92ea880cd3ed4a5d2fdd · annanay25/tempo · GitHub

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package local

import (
	"bytes"
	"context"
	"fmt"
	"io/ioutil"
	"math/rand"
	"os"
	"testing"

	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"

	"github.com/grafana/tempo/tempodb/backend"
	"github.com/grafana/tempo/tempodb/encoding/common"
)

const objectName = "test"
const objectReaderName = "test-reader"

func TestReadWrite(t *testing.T) {
	tempDir, err := ioutil.TempDir("/tmp", "")
	defer os.RemoveAll(tempDir)
	assert.NoError(t, err, "unexpected error creating temp dir")

	fakeTracesFile, err := ioutil.TempFile("/tmp", "")
	defer os.Remove(fakeTracesFile.Name())
	assert.NoError(t, err, "unexpected error creating temp file")

	r, w, _, err := New(&Config{
		Path: tempDir,
	})
	assert.NoError(t, err, "unexpected error creating local backend")

	blockID := uuid.New()
	tenantIDs := []string{"fake"}

	for i := 0; i < 10; i++ {
		tenantIDs = append(tenantIDs, fmt.Sprintf("%d", rand.Int()))
	}

	fakeMeta := &backend.BlockMeta{
		BlockID: blockID,
	}

	fakeObject := make([]byte, 20)

	_, err = rand.Read(fakeObject)
	assert.NoError(t, err, "unexpected error creating fakeObject")

	ctx := context.Background()
	for _, id := range tenantIDs {
		fakeMeta.TenantID = id
		err = w.WriteBlockMeta(ctx, fakeMeta)
		assert.NoError(t, err, "unexpected error writing meta")
		err = w.Write(ctx, objectName, fakeMeta.BlockID, id, fakeObject)
		assert.NoError(t, err, "unexpected error writing")
		err = w.WriteReader(ctx, objectReaderName, fakeMeta.BlockID, id, bytes.NewBuffer(fakeObject), int64(len(fakeObject)))
		assert.NoError(t, err, "unexpected error writing reader")
	}

	actualMeta, err := r.BlockMeta(ctx, blockID, fakeMeta.TenantID)
	assert.NoError(t, err, "unexpected error reading meta")
	assert.Equal(t, fakeMeta, actualMeta)

	actualObject, err := r.Read(ctx, objectName, blockID, tenantIDs[0])
	assert.NoError(t, err, "unexpected error reading")
	assert.Equal(t, fakeObject, actualObject)

	actualReadRange := make([]byte, 5)
	err = r.ReadRange(ctx, objectReaderName, blockID, tenantIDs[0], 5, actualReadRange)
	assert.NoError(t, err, "unexpected error range")
	assert.Equal(t, fakeObject[5:10], actualReadRange)

	list, err := r.Blocks(ctx, tenantIDs[0])
	assert.NoError(t, err, "unexpected error reading blocklist")
	assert.Len(t, list, 1)
	assert.Equal(t, blockID, list[0])

	tenants, err := r.Tenants(ctx)
	assert.NoError(t, err, "unexpected error reading tenants")
	assert.Len(t, tenants, len(tenantIDs))
}

func TestCompaction(t *testing.T) {
	tempDir, err := ioutil.TempDir("/tmp", "")
	defer os.RemoveAll(tempDir)
	assert.NoError(t, err, "unexpected error creating temp dir")

	fakeTracesFile, err := ioutil.TempFile("/tmp", "")
	defer os.Remove(fakeTracesFile.Name())
	assert.NoError(t, err, "unexpected error creating temp file")

	r, w, c, err := New(&Config{
		Path: tempDir,
	})
	assert.NoError(t, err, "unexpected error creating local backend")

	blockID := uuid.New()
	tenantIDs := []string{"fake"}

	for i := 0; i < 10; i++ {
		tenantIDs = append(tenantIDs, fmt.Sprintf("%d", rand.Int()))
	}

	fakeMeta := &backend.BlockMeta{
		BlockID: blockID,
	}

	shardNum := common.ValidateShardCount(int(fakeMeta.BloomShardCount))
	fakeBloom := make([][]byte, shardNum)
	fakeIndex := make([]byte, 20)
	fakeTraces := make([]byte, 200)

	for i := range fakeBloom {
		fakeBloom[i] = make([]byte, 20)
		_, err := rand.Read(fakeBloom[i])
		assert.NoError(t, err, "unexpected error creating fakeBloom")
	}
	_, err = rand.Read(fakeIndex)
	assert.NoError(t, err, "unexpected error creating fakeIndex")
	_, err = rand.Read(fakeTraces)
	assert.NoError(t, err, "unexpected error creating fakeTraces")
	_, err = fakeTracesFile.Write(fakeTraces)
	assert.NoError(t, err, "unexpected error writing fakeTraces")

	ctx := context.Background()
	for _, id := range tenantIDs {
		fakeMeta.TenantID = id

		err = w.WriteBlockMeta(ctx, fakeMeta)
		assert.NoError(t, err, "unexpected error writing")

		compactedMeta, err := c.CompactedBlockMeta(blockID, id)
		assert.Equal(t, backend.ErrMetaDoesNotExist, err)
		assert.Nil(t, compactedMeta)

		err = c.MarkBlockCompacted(blockID, id)
		assert.NoError(t, err)

		compactedMeta, err = c.CompactedBlockMeta(blockID, id)
		assert.NoError(t, err)
		assert.NotNil(t, compactedMeta)

		meta, err := r.BlockMeta(ctx, blockID, id)
		assert.Equal(t, backend.ErrMetaDoesNotExist, err)
		assert.Nil(t, meta)

		err = c.ClearBlock(blockID, id)
		assert.NoError(t, err)

		compactedMeta, err = c.CompactedBlockMeta(blockID, id)
		assert.Equal(t, backend.ErrMetaDoesNotExist, err)
		assert.Nil(t, compactedMeta)

		meta, err = r.BlockMeta(ctx, blockID, id)
		assert.Equal(t, backend.ErrMetaDoesNotExist, err)
		assert.Nil(t, meta)
	}
}