+++ /dev/null
-package main
-
-import (
- "bytes"
- "fmt"
- "io/ioutil"
- "os"
- "path"
- "regexp"
- "testing"
-)
-
-var TEST_BLOCK = []byte("The quick brown fox jumps over the lazy dog.")
-var TEST_HASH = "e4d909c290d0fb1ca068ffaddf22cbd0"
-
-var TEST_BLOCK_2 = []byte("Pack my box with five dozen liquor jugs.")
-var TEST_HASH_2 = "f15ac516f788aec4f30932ffb6395c39"
-
-var TEST_BLOCK_3 = []byte("Now is the time for all good men to come to the aid of their country.")
-var TEST_HASH_3 = "eed29bbffbc2dbe5e5ee0bb71888e61f"
-
-// BAD_BLOCK is used to test collisions and corruption.
-// It must not match any test hashes.
-var BAD_BLOCK = []byte("The magic words are squeamish ossifrage.")
-
-// TODO(twp): Tests still to be written
-//
-// * TestPutBlockFull
-// - test that PutBlock returns 503 Full if the filesystem is full.
-// (must mock FreeDiskSpace or Statfs? use a tmpfs?)
-//
-// * TestPutBlockWriteErr
-// - test the behavior when Write returns an error.
-// - Possible solutions: use a small tmpfs and a high
-// MIN_FREE_KILOBYTES to trick PutBlock into attempting
-// to write a block larger than the amount of space left
-// - use an interface to mock ioutil.TempFile with a File
-// object that always returns an error on write
-//
-// ========================================
-// GetBlock tests.
-// ========================================
-
-// TestGetBlock
-// Test that simple block reads succeed.
-//
-func TestGetBlock(t *testing.T) {
- defer teardown()
-
- // Prepare two test Keep volumes. Our block is stored on the second volume.
- KeepVolumes = setup(t, 2)
- store(t, KeepVolumes[1], TEST_HASH, TEST_BLOCK)
-
- // Check that GetBlock returns success.
- result, err := GetBlock(TEST_HASH)
- if err != nil {
- t.Errorf("GetBlock error: %s", err)
- }
- if fmt.Sprint(result) != fmt.Sprint(TEST_BLOCK) {
- t.Errorf("expected %s, got %s", TEST_BLOCK, result)
- }
-}
-
-// TestGetBlockMissing
-// GetBlock must return an error when the block is not found.
-//
-func TestGetBlockMissing(t *testing.T) {
- defer teardown()
-
- // Create two empty test Keep volumes.
- KeepVolumes = setup(t, 2)
-
- // Check that GetBlock returns failure.
- result, err := GetBlock(TEST_HASH)
- if err != NotFoundError {
- t.Errorf("Expected NotFoundError, got %v", result)
- }
-}
-
-// TestGetBlockCorrupt
-// GetBlock must return an error when a corrupted block is requested
-// (the contents of the file do not checksum to its hash).
-//
-func TestGetBlockCorrupt(t *testing.T) {
- defer teardown()
-
- // Create two test Keep volumes and store a block in each of them,
- // but the hash of the block does not match the filename.
- KeepVolumes = setup(t, 2)
- for _, vol := range KeepVolumes {
- store(t, vol, TEST_HASH, BAD_BLOCK)
- }
-
- // Check that GetBlock returns failure.
- result, err := GetBlock(TEST_HASH)
- if err != CorruptError {
- t.Errorf("Expected CorruptError, got %v", result)
- }
-}
-
-// ========================================
-// PutBlock tests
-// ========================================
-
-// TestPutBlockOK
-// PutBlock can perform a simple block write and returns success.
-//
-func TestPutBlockOK(t *testing.T) {
- defer teardown()
-
- // Create two test Keep volumes.
- KeepVolumes = setup(t, 2)
-
- // Check that PutBlock stores the data as expected.
- if err := PutBlock(TEST_BLOCK, TEST_HASH); err != nil {
- t.Fatalf("PutBlock: %v", err)
- }
-
- result, err := GetBlock(TEST_HASH)
- if err != nil {
- t.Fatalf("GetBlock returned error: %v", err)
- }
- if string(result) != string(TEST_BLOCK) {
- t.Error("PutBlock/GetBlock mismatch")
- t.Fatalf("PutBlock stored '%s', GetBlock retrieved '%s'",
- string(TEST_BLOCK), string(result))
- }
-}
-
-// TestPutBlockOneVol
-// PutBlock still returns success even when only one of the known
-// volumes is online.
-//
-func TestPutBlockOneVol(t *testing.T) {
- defer teardown()
-
- // Create two test Keep volumes, but cripple one of them.
- KeepVolumes = setup(t, 2)
- os.Chmod(KeepVolumes[0], 000)
-
- // Check that PutBlock stores the data as expected.
- if err := PutBlock(TEST_BLOCK, TEST_HASH); err != nil {
- t.Fatalf("PutBlock: %v", err)
- }
-
- result, err := GetBlock(TEST_HASH)
- if err != nil {
- t.Fatalf("GetBlock: %v", err)
- }
- if string(result) != string(TEST_BLOCK) {
- t.Error("PutBlock/GetBlock mismatch")
- t.Fatalf("PutBlock stored '%s', GetBlock retrieved '%s'",
- string(TEST_BLOCK), string(result))
- }
-}
-
-// TestPutBlockMD5Fail
-// Check that PutBlock returns an error if passed a block and hash that
-// do not match.
-//
-func TestPutBlockMD5Fail(t *testing.T) {
- defer teardown()
-
- // Create two test Keep volumes.
- KeepVolumes = setup(t, 2)
-
- // Check that PutBlock returns the expected error when the hash does
- // not match the block.
- if err := PutBlock(BAD_BLOCK, TEST_HASH); err != MD5Error {
- t.Error("Expected MD5Error, got %v", err)
- }
-
- // Confirm that GetBlock fails to return anything.
- if result, err := GetBlock(TEST_HASH); err != NotFoundError {
- t.Errorf("GetBlock succeeded after a corrupt block store (result = %s, err = %v)",
- string(result), err)
- }
-}
-
-// TestPutBlockCorrupt
-// PutBlock should overwrite corrupt blocks on disk when given
-// a PUT request with a good block.
-//
-func TestPutBlockCorrupt(t *testing.T) {
- defer teardown()
-
- // Create two test Keep volumes.
- KeepVolumes = setup(t, 2)
-
- // Store a corrupted block under TEST_HASH.
- store(t, KeepVolumes[0], TEST_HASH, BAD_BLOCK)
- if err := PutBlock(TEST_BLOCK, TEST_HASH); err != nil {
- t.Errorf("PutBlock: %v", err)
- }
-
- // The block on disk should now match TEST_BLOCK.
- if block, err := GetBlock(TEST_HASH); err != nil {
- t.Errorf("GetBlock: %v", err)
- } else if bytes.Compare(block, TEST_BLOCK) != 0 {
- t.Errorf("GetBlock returned: '%s'", string(block))
- }
-}
-
-// PutBlockCollision
-// PutBlock returns a 400 Collision error when attempting to
-// store a block that collides with another block on disk.
-//
-func TestPutBlockCollision(t *testing.T) {
- defer teardown()
-
- // These blocks both hash to the MD5 digest cee9a457e790cf20d4bdaa6d69f01e41.
- var b1 = []byte("\x0e0eaU\x9a\xa7\x87\xd0\x0b\xc6\xf7\x0b\xbd\xfe4\x04\xcf\x03e\x9epO\x854\xc0\x0f\xfbe\x9cL\x87@\xcc\x94/\xeb-\xa1\x15\xa3\xf4\x15\\\xbb\x86\x07Is\x86em}\x1f4\xa4 Y\xd7\x8fZ\x8d\xd1\xef")
- var b2 = []byte("\x0e0eaU\x9a\xa7\x87\xd0\x0b\xc6\xf7\x0b\xbd\xfe4\x04\xcf\x03e\x9etO\x854\xc0\x0f\xfbe\x9cL\x87@\xcc\x94/\xeb-\xa1\x15\xa3\xf4\x15\xdc\xbb\x86\x07Is\x86em}\x1f4\xa4 Y\xd7\x8fZ\x8d\xd1\xef")
- var locator = "cee9a457e790cf20d4bdaa6d69f01e41"
-
- // Prepare two test Keep volumes. Store one block,
- // then attempt to store the other.
- KeepVolumes = setup(t, 2)
- store(t, KeepVolumes[1], locator, b1)
-
- if err := PutBlock(b2, locator); err == nil {
- t.Error("PutBlock did not report a collision")
- } else if err != CollisionError {
- t.Errorf("PutBlock returned %v", err)
- }
-}
-
-// ========================================
-// FindKeepVolumes tests.
-// ========================================
-
-// TestFindKeepVolumes
-// Confirms that FindKeepVolumes finds tmpfs volumes with "/keep"
-// directories at the top level.
-//
-func TestFindKeepVolumes(t *testing.T) {
- defer teardown()
-
- // Initialize two keep volumes.
- var tempVols []string = setup(t, 2)
-
- // Set up a bogus PROC_MOUNTS file.
- if f, err := ioutil.TempFile("", "keeptest"); err == nil {
- for _, vol := range tempVols {
- fmt.Fprintf(f, "tmpfs %s tmpfs opts\n", path.Dir(vol))
- }
- f.Close()
- PROC_MOUNTS = f.Name()
-
- // Check that FindKeepVolumes finds the temp volumes.
- resultVols := FindKeepVolumes()
- if len(tempVols) != len(resultVols) {
- t.Fatalf("set up %d volumes, FindKeepVolumes found %d\n",
- len(tempVols), len(resultVols))
- }
- for i := range tempVols {
- if tempVols[i] != resultVols[i] {
- t.Errorf("FindKeepVolumes returned %s, expected %s\n",
- resultVols[i], tempVols[i])
- }
- }
-
- os.Remove(f.Name())
- }
-}
-
-// TestFindKeepVolumesFail
-// When no Keep volumes are present, FindKeepVolumes returns an empty slice.
-//
-func TestFindKeepVolumesFail(t *testing.T) {
- defer teardown()
-
- // Set up a bogus PROC_MOUNTS file with no Keep vols.
- if f, err := ioutil.TempFile("", "keeptest"); err == nil {
- fmt.Fprintln(f, "rootfs / rootfs opts 0 0")
- fmt.Fprintln(f, "sysfs /sys sysfs opts 0 0")
- fmt.Fprintln(f, "proc /proc proc opts 0 0")
- fmt.Fprintln(f, "udev /dev devtmpfs opts 0 0")
- fmt.Fprintln(f, "devpts /dev/pts devpts opts 0 0")
- f.Close()
- PROC_MOUNTS = f.Name()
-
- // Check that FindKeepVolumes returns an empty array.
- resultVols := FindKeepVolumes()
- if len(resultVols) != 0 {
- t.Fatalf("FindKeepVolumes returned %v", resultVols)
- }
-
- os.Remove(PROC_MOUNTS)
- }
-}
-
-// TestIndex
-// Test an /index request.
-func TestIndex(t *testing.T) {
- defer teardown()
-
- // Set up Keep volumes and populate them.
- // Include multiple blocks on different volumes, and
- // some metadata files.
- KeepVolumes = setup(t, 2)
- store(t, KeepVolumes[0], TEST_HASH, TEST_BLOCK)
- store(t, KeepVolumes[1], TEST_HASH_2, TEST_BLOCK_2)
- store(t, KeepVolumes[0], TEST_HASH_3, TEST_BLOCK_3)
- store(t, KeepVolumes[0], TEST_HASH+".meta", []byte("metadata"))
- store(t, KeepVolumes[1], TEST_HASH_2+".meta", []byte("metadata"))
-
- index := IndexLocators("")
- expected := `^` + TEST_HASH + `\+\d+ \d+\n` +
- TEST_HASH_3 + `\+\d+ \d+\n` +
- TEST_HASH_2 + `\+\d+ \d+\n$`
-
- match, err := regexp.MatchString(expected, index)
- if err == nil {
- if !match {
- t.Errorf("IndexLocators returned:\n-----\n%s-----\n", index)
- }
- } else {
- t.Errorf("regexp.MatchString: %s", err)
- }
-}
-
-// TestNodeStatus
-// Test that GetNodeStatus returns valid info about available volumes.
-//
-// TODO(twp): set up appropriate interfaces to permit more rigorous
-// testing.
-//
-func TestNodeStatus(t *testing.T) {
- defer teardown()
-
- // Set up test Keep volumes.
- KeepVolumes = setup(t, 2)
-
- // Get node status and make a basic sanity check.
- st := GetNodeStatus()
- for i, vol := range KeepVolumes {
- volinfo := st.Volumes[i]
- mtp := volinfo.MountPoint
- if mtp != vol {
- t.Errorf("GetNodeStatus mount_point %s != KeepVolume %s", mtp, vol)
- }
- if volinfo.DeviceNum == 0 {
- t.Errorf("uninitialized device_num in %v", volinfo)
- }
- if volinfo.BytesFree == 0 {
- t.Errorf("uninitialized bytes_free in %v", volinfo)
- }
- if volinfo.BytesUsed == 0 {
- t.Errorf("uninitialized bytes_used in %v", volinfo)
- }
- }
-}
-
-// ========================================
-// Helper functions for unit tests.
-// ========================================
-
-// setup
-// Create KeepVolumes for testing.
-// Returns a slice of pathnames to temporary Keep volumes.
-//
-func setup(t *testing.T, num_volumes int) []string {
- vols := make([]string, num_volumes)
- for i := range vols {
- if dir, err := ioutil.TempDir(os.TempDir(), "keeptest"); err == nil {
- vols[i] = dir + "/keep"
- os.Mkdir(vols[i], 0755)
- } else {
- t.Fatal(err)
- }
- }
- return vols
-}
-
-// teardown
-// Cleanup to perform after each test.
-//
-func teardown() {
- for _, vol := range KeepVolumes {
- os.RemoveAll(path.Dir(vol))
- }
- KeepVolumes = nil
-}
-
-// store
-// Low-level code to write Keep blocks directly to disk for testing.
-//
-func store(t *testing.T, keepdir string, filename string, block []byte) {
- blockdir := fmt.Sprintf("%s/%s", keepdir, filename[:3])
- if err := os.MkdirAll(blockdir, 0755); err != nil {
- t.Fatal(err)
- }
-
- blockpath := fmt.Sprintf("%s/%s", blockdir, filename)
- if f, err := os.Create(blockpath); err == nil {
- f.Write(block)
- f.Close()
- } else {
- t.Fatal(err)
- }
-}
projects / arvados.git / blobdiff