X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/fbeca60ad61f0ef846a026b288a3bc5104383da7..50128b53da4003912635b03fb27b5be2c5beaca1:/services/keepstore/volume_generic_test.go

diff --git a/services/keepstore/volume_generic_test.go b/services/keepstore/volume_generic_test.go
index 24ebc35a5f..7e72a8f246 100644
--- a/services/keepstore/volume_generic_test.go
+++ b/services/keepstore/volume_generic_test.go
@@ -2,102 +2,1010 @@ package main
 
 import (
 	"bytes"
+	"context"
+	"crypto/md5"
+	"fmt"
 	"os"
-	"testing"
+	"regexp"
+	"sort"
+	"strconv"
+	"strings"
 	"time"
+
+	"git.curoverse.com/arvados.git/sdk/go/arvados"
+	"git.curoverse.com/arvados.git/sdk/go/arvadostest"
 )
 
+type TB interface {
+	Error(args ...interface{})
+	Errorf(format string, args ...interface{})
+	Fail()
+	FailNow()
+	Failed() bool
+	Fatal(args ...interface{})
+	Fatalf(format string, args ...interface{})
+	Log(args ...interface{})
+	Logf(format string, args ...interface{})
+}
+
 // A TestableVolumeFactory returns a new TestableVolume. The factory
-// function, and the TestableVolume it returns, can use t to write
+// function, and the TestableVolume it returns, can use "t" to write
 // logs, fail the current test, etc.
-type TestableVolumeFactory func(t *testing.T) TestableVolume
+type TestableVolumeFactory func(t TB) TestableVolume
 
 // DoGenericVolumeTests runs a set of tests that every TestableVolume
-// is expected to pass. It calls factory to create a new
-// TestableVolume for each test case, to avoid leaking state between
-// tests.
-func DoGenericVolumeTests(t *testing.T, factory TestableVolumeFactory) {
-	/*
-		testGetBlock(t, factory)
-		testGetNoSuchBlock(t, factory)
-		testGetSystemError(t, factory)
-
-		testCompareSameContent(t, factory)
-		testCompareWithCollisionError(t, factory)
-		testCompareWithCorruptError(t, factory)
-		testCompareSystemError(t, factory)
-
-		testPutBlock(t, factory)
-		testPutMultipleBlocks(t, factory)
-		testPutBlockWithSameContent(t, factory)
-		testPutBlockWithDifferentContent(t, factory)
-		testPutBlockSystemError(t, factory)
-
-		testTouch(t, factory)
-		testTouchNoSuchBlock(t, factory)
-		testTouchSystemError(t, factory)
-
-		testMtime(t, factory)
-		testMtimeNoSuchBlock(t, factory)
-		testMtimeSystemError(t, factory)
-
-		testIndexToWithNoPrefix(t, factory)
-		testIndexToWithPrefix(t, factory)
-		testIndexToWithNoSuchPrefix(t, factory)
-		testIndexToOnEmptyVolume(t, factory)
-		testIndexToSystemError(t, factory)
-
-		testDeleteNewBlock(t, factory)
-		testDeleteOldWithOnlyBlockInVol(t, factory)
-		testDeleteOldWithOtherBlocksInVol(t, factory)
-		testDeleteNoSuchBlock(t, factory)
-		testDeleteSystemError(t, factory)
-
-		testStatus(t, factory)
-		testStatusWithError(t, factory)
-		testStatusSystemError(t, factory)
-
-		testString(t, factory)
-		testStringSystemError(t, factory)
-
-		testWritableTrue(t, factory)
-		testWritableFalse(t, factory)
-		testWritableSystemError(t, factory)
-	*/
+// is expected to pass. It calls factory to create a new TestableVolume
+// for each test case, to avoid leaking state between tests.
+func DoGenericVolumeTests(t TB, factory TestableVolumeFactory) {
+	testGet(t, factory)
+	testGetNoSuchBlock(t, factory)
+
+	testCompareNonexistent(t, factory)
+	testCompareSameContent(t, factory, TestHash, TestBlock)
+	testCompareSameContent(t, factory, EmptyHash, EmptyBlock)
+	testCompareWithCollision(t, factory, TestHash, TestBlock, []byte("baddata"))
+	testCompareWithCollision(t, factory, TestHash, TestBlock, EmptyBlock)
+	testCompareWithCollision(t, factory, EmptyHash, EmptyBlock, TestBlock)
+	testCompareWithCorruptStoredData(t, factory, TestHash, TestBlock, []byte("baddata"))
+	testCompareWithCorruptStoredData(t, factory, TestHash, TestBlock, EmptyBlock)
+	testCompareWithCorruptStoredData(t, factory, EmptyHash, EmptyBlock, []byte("baddata"))
+
+	testPutBlockWithSameContent(t, factory, TestHash, TestBlock)
+	testPutBlockWithSameContent(t, factory, EmptyHash, EmptyBlock)
+	testPutBlockWithDifferentContent(t, factory, arvadostest.MD5CollisionMD5, arvadostest.MD5CollisionData[0], arvadostest.MD5CollisionData[1])
+	testPutBlockWithDifferentContent(t, factory, arvadostest.MD5CollisionMD5, EmptyBlock, arvadostest.MD5CollisionData[0])
+	testPutBlockWithDifferentContent(t, factory, arvadostest.MD5CollisionMD5, arvadostest.MD5CollisionData[0], EmptyBlock)
+	testPutBlockWithDifferentContent(t, factory, EmptyHash, EmptyBlock, arvadostest.MD5CollisionData[0])
+	testPutMultipleBlocks(t, factory)
+
+	testPutAndTouch(t, factory)
+	testTouchNoSuchBlock(t, factory)
+
+	testMtimeNoSuchBlock(t, factory)
+
+	testIndexTo(t, factory)
 
 	testDeleteNewBlock(t, factory)
 	testDeleteOldBlock(t, factory)
+	testDeleteNoSuchBlock(t, factory)
+
+	testStatus(t, factory)
+
+	testString(t, factory)
+
+	testUpdateReadOnly(t, factory)
+
+	testGetConcurrent(t, factory)
+	testPutConcurrent(t, factory)
+
+	testPutFullBlock(t, factory)
+
+	testTrashUntrash(t, factory)
+	testTrashEmptyTrashUntrash(t, factory)
+}
+
+// Put a test block, get it and verify content
+// Test should pass for both writable and read-only volumes
+func testGet(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	v.PutRaw(TestHash, TestBlock)
+
+	buf := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), TestHash, buf)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if bytes.Compare(buf[:n], TestBlock) != 0 {
+		t.Errorf("expected %s, got %s", string(TestBlock), string(buf))
+	}
+}
+
+// Invoke get on a block that does not exist in volume; should result in error
+// Test should pass for both writable and read-only volumes
+func testGetNoSuchBlock(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	buf := make([]byte, BlockSize)
+	if _, err := v.Get(context.Background(), TestHash2, buf); err == nil {
+		t.Errorf("Expected error while getting non-existing block %v", TestHash2)
+	}
+}
+
+// Compare() should return os.ErrNotExist if the block does not exist.
+// Otherwise, writing new data causes CompareAndTouch() to generate
+// error logs even though everything is working fine.
+func testCompareNonexistent(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	err := v.Compare(context.Background(), TestHash, TestBlock)
+	if err != os.ErrNotExist {
+		t.Errorf("Got err %T %q, expected os.ErrNotExist", err, err)
+	}
+}
+
+// Put a test block and compare the locator with same content
+// Test should pass for both writable and read-only volumes
+func testCompareSameContent(t TB, factory TestableVolumeFactory, testHash string, testData []byte) {
+	v := factory(t)
+	defer v.Teardown()
+
+	v.PutRaw(testHash, testData)
+
+	// Compare the block locator with same content
+	err := v.Compare(context.Background(), testHash, testData)
+	if err != nil {
+		t.Errorf("Got err %q, expected nil", err)
+	}
+}
+
+// Test behavior of Compare() when stored data matches expected
+// checksum but differs from new data we need to store. Requires
+// testHash = md5(testDataA).
+//
+// Test should pass for both writable and read-only volumes
+func testCompareWithCollision(t TB, factory TestableVolumeFactory, testHash string, testDataA, testDataB []byte) {
+	v := factory(t)
+	defer v.Teardown()
+
+	v.PutRaw(testHash, testDataA)
+
+	// Compare the block locator with different content; collision
+	err := v.Compare(context.Background(), TestHash, testDataB)
+	if err == nil {
+		t.Errorf("Got err nil, expected error due to collision")
+	}
+}
+
+// Test behavior of Compare() when stored data has become
+// corrupted. Requires testHash = md5(testDataA) != md5(testDataB).
+//
+// Test should pass for both writable and read-only volumes
+func testCompareWithCorruptStoredData(t TB, factory TestableVolumeFactory, testHash string, testDataA, testDataB []byte) {
+	v := factory(t)
+	defer v.Teardown()
+
+	v.PutRaw(TestHash, testDataB)
+
+	err := v.Compare(context.Background(), testHash, testDataA)
+	if err == nil || err == CollisionError {
+		t.Errorf("Got err %+v, expected non-collision error", err)
+	}
+}
+
+// Put a block and put again with same content
+// Test is intended for only writable volumes
+func testPutBlockWithSameContent(t TB, factory TestableVolumeFactory, testHash string, testData []byte) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if v.Writable() == false {
+		return
+	}
+
+	err := v.Put(context.Background(), testHash, testData)
+	if err != nil {
+		t.Errorf("Got err putting block %q: %q, expected nil", TestBlock, err)
+	}
+
+	err = v.Put(context.Background(), testHash, testData)
+	if err != nil {
+		t.Errorf("Got err putting block second time %q: %q, expected nil", TestBlock, err)
+	}
+}
+
+// Put a block and put again with different content
+// Test is intended for only writable volumes
+func testPutBlockWithDifferentContent(t TB, factory TestableVolumeFactory, testHash string, testDataA, testDataB []byte) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if v.Writable() == false {
+		return
+	}
+
+	v.PutRaw(testHash, testDataA)
+
+	putErr := v.Put(context.Background(), testHash, testDataB)
+	buf := make([]byte, BlockSize)
+	n, getErr := v.Get(context.Background(), testHash, buf)
+	if putErr == nil {
+		// Put must not return a nil error unless it has
+		// overwritten the existing data.
+		if bytes.Compare(buf[:n], testDataB) != 0 {
+			t.Errorf("Put succeeded but Get returned %+q, expected %+q", buf[:n], testDataB)
+		}
+	} else {
+		// It is permissible for Put to fail, but it must
+		// leave us with either the original data, the new
+		// data, or nothing at all.
+		if getErr == nil && bytes.Compare(buf[:n], testDataA) != 0 && bytes.Compare(buf[:n], testDataB) != 0 {
+			t.Errorf("Put failed but Get returned %+q, which is neither %+q nor %+q", buf[:n], testDataA, testDataB)
+		}
+	}
+}
+
+// Put and get multiple blocks
+// Test is intended for only writable volumes
+func testPutMultipleBlocks(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if v.Writable() == false {
+		return
+	}
+
+	err := v.Put(context.Background(), TestHash, TestBlock)
+	if err != nil {
+		t.Errorf("Got err putting block %q: %q, expected nil", TestBlock, err)
+	}
+
+	err = v.Put(context.Background(), TestHash2, TestBlock2)
+	if err != nil {
+		t.Errorf("Got err putting block %q: %q, expected nil", TestBlock2, err)
+	}
+
+	err = v.Put(context.Background(), TestHash3, TestBlock3)
+	if err != nil {
+		t.Errorf("Got err putting block %q: %q, expected nil", TestBlock3, err)
+	}
+
+	data := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), TestHash, data)
+	if err != nil {
+		t.Error(err)
+	} else {
+		if bytes.Compare(data[:n], TestBlock) != 0 {
+			t.Errorf("Block present, but got %+q, expected %+q", data[:n], TestBlock)
+		}
+	}
+
+	n, err = v.Get(context.Background(), TestHash2, data)
+	if err != nil {
+		t.Error(err)
+	} else {
+		if bytes.Compare(data[:n], TestBlock2) != 0 {
+			t.Errorf("Block present, but got %+q, expected %+q", data[:n], TestBlock2)
+		}
+	}
+
+	n, err = v.Get(context.Background(), TestHash3, data)
+	if err != nil {
+		t.Error(err)
+	} else {
+		if bytes.Compare(data[:n], TestBlock3) != 0 {
+			t.Errorf("Block present, but to %+q, expected %+q", data[:n], TestBlock3)
+		}
+	}
+}
+
+// testPutAndTouch
+//   Test that when applying PUT to a block that already exists,
+//   the block's modification time is updated.
+// Test is intended for only writable volumes
+func testPutAndTouch(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if v.Writable() == false {
+		return
+	}
+
+	if err := v.Put(context.Background(), TestHash, TestBlock); err != nil {
+		t.Error(err)
+	}
+
+	// We'll verify { t0 < threshold < t1 }, where t0 is the
+	// existing block's timestamp on disk before Put() and t1 is
+	// its timestamp after Put().
+	threshold := time.Now().Add(-time.Second)
+
+	// Set the stored block's mtime far enough in the past that we
+	// can see the difference between "timestamp didn't change"
+	// and "timestamp granularity is too low".
+	v.TouchWithDate(TestHash, time.Now().Add(-20*time.Second))
+
+	// Make sure v.Mtime() agrees the above Utime really worked.
+	if t0, err := v.Mtime(TestHash); err != nil || t0.IsZero() || !t0.Before(threshold) {
+		t.Errorf("Setting mtime failed: %v, %v", t0, err)
+	}
+
+	// Write the same block again.
+	if err := v.Put(context.Background(), TestHash, TestBlock); err != nil {
+		t.Error(err)
+	}
+
+	// Verify threshold < t1
+	if t1, err := v.Mtime(TestHash); err != nil {
+		t.Error(err)
+	} else if t1.Before(threshold) {
+		t.Errorf("t1 %v should be >= threshold %v after v.Put ", t1, threshold)
+	}
+}
+
+// Touching a non-existing block should result in error.
+// Test should pass for both writable and read-only volumes
+func testTouchNoSuchBlock(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if err := v.Touch(TestHash); err == nil {
+		t.Error("Expected error when attempted to touch a non-existing block")
+	}
+}
+
+// Invoking Mtime on a non-existing block should result in error.
+// Test should pass for both writable and read-only volumes
+func testMtimeNoSuchBlock(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if _, err := v.Mtime("12345678901234567890123456789012"); err == nil {
+		t.Error("Expected error when updating Mtime on a non-existing block")
+	}
+}
+
+// Put a few blocks and invoke IndexTo with:
+// * no prefix
+// * with a prefix
+// * with no such prefix
+// Test should pass for both writable and read-only volumes
+func testIndexTo(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	// minMtime and maxMtime are the minimum and maximum
+	// acceptable values the index can report for our test
+	// blocks. 1-second precision is acceptable.
+	minMtime := time.Now().UTC().UnixNano()
+	minMtime -= minMtime % 1e9
+
+	v.PutRaw(TestHash, TestBlock)
+	v.PutRaw(TestHash2, TestBlock2)
+	v.PutRaw(TestHash3, TestBlock3)
+
+	maxMtime := time.Now().UTC().UnixNano()
+	if maxMtime%1e9 > 0 {
+		maxMtime -= maxMtime % 1e9
+		maxMtime += 1e9
+	}
+
+	// Blocks whose names aren't Keep hashes should be omitted from
+	// index
+	v.PutRaw("fffffffffnotreallyahashfffffffff", nil)
+	v.PutRaw("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", nil)
+	v.PutRaw("f0000000000000000000000000000000f", nil)
+	v.PutRaw("f00", nil)
+
+	buf := new(bytes.Buffer)
+	v.IndexTo("", buf)
+	indexRows := strings.Split(string(buf.Bytes()), "\n")
+	sort.Strings(indexRows)
+	sortedIndex := strings.Join(indexRows, "\n")
+	m := regexp.MustCompile(
+		`^\n` + TestHash + `\+\d+ (\d+)\n` +
+			TestHash3 + `\+\d+ \d+\n` +
+			TestHash2 + `\+\d+ \d+$`,
+	).FindStringSubmatch(sortedIndex)
+	if m == nil {
+		t.Errorf("Got index %q for empty prefix", sortedIndex)
+	} else {
+		mtime, err := strconv.ParseInt(m[1], 10, 64)
+		if err != nil {
+			t.Error(err)
+		} else if mtime < minMtime || mtime > maxMtime {
+			t.Errorf("got %d for TestHash timestamp, expected %d <= t <= %d",
+				mtime, minMtime, maxMtime)
+		}
+	}
+
+	for _, prefix := range []string{"f", "f15", "f15ac"} {
+		buf = new(bytes.Buffer)
+		v.IndexTo(prefix, buf)
+
+		m, err := regexp.MatchString(`^`+TestHash2+`\+\d+ \d+\n$`, string(buf.Bytes()))
+		if err != nil {
+			t.Error(err)
+		} else if !m {
+			t.Errorf("Got index %q for prefix %s", string(buf.Bytes()), prefix)
+		}
+	}
+
+	for _, prefix := range []string{"zero", "zip", "zilch"} {
+		buf = new(bytes.Buffer)
+		err := v.IndexTo(prefix, buf)
+		if err != nil {
+			t.Errorf("Got error on IndexTo with no such prefix %v", err.Error())
+		} else if buf.Len() != 0 {
+			t.Errorf("Expected empty list for IndexTo with no such prefix %s", prefix)
+		}
+	}
 }
 
-// Calling Delete() for a block immediately after writing it should
-// neither delete the data nor return an error.
-func testDeleteNewBlock(t *testing.T, factory TestableVolumeFactory) {
+// Calling Delete() for a block immediately after writing it (not old enough)
+// should neither delete the data nor return an error.
+// Test is intended for only writable volumes
+func testDeleteNewBlock(t TB, factory TestableVolumeFactory) {
 	v := factory(t)
 	defer v.Teardown()
-	v.Put(TEST_HASH, TEST_BLOCK)
+	theConfig.BlobSignatureTTL.Set("5m")
+
+	if v.Writable() == false {
+		return
+	}
 
-	if err := v.Delete(TEST_HASH); err != nil {
+	v.Put(context.Background(), TestHash, TestBlock)
+
+	if err := v.Trash(TestHash); err != nil {
 		t.Error(err)
 	}
-	if data, err := v.Get(TEST_HASH); err != nil {
+	data := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), TestHash, data)
+	if err != nil {
 		t.Error(err)
-	} else if bytes.Compare(data, TEST_BLOCK) != 0 {
-		t.Error("Block still present, but content is incorrect: %+v != %+v", data, TEST_BLOCK)
+	} else if bytes.Compare(data[:n], TestBlock) != 0 {
+		t.Errorf("Got data %+q, expected %+q", data[:n], TestBlock)
 	}
 }
 
 // Calling Delete() for a block with a timestamp older than
-// blob_signature_ttl seconds in the past should delete the data.
-func testDeleteOldBlock(t *testing.T, factory TestableVolumeFactory) {
+// BlobSignatureTTL seconds in the past should delete the data.
+// Test is intended for only writable volumes
+func testDeleteOldBlock(t TB, factory TestableVolumeFactory) {
 	v := factory(t)
 	defer v.Teardown()
-	v.Put(TEST_HASH, TEST_BLOCK)
-	v.TouchWithDate(TEST_HASH, time.Now().Add(-2*blob_signature_ttl*time.Second))
+	theConfig.BlobSignatureTTL.Set("5m")
+
+	if v.Writable() == false {
+		return
+	}
 
-	if err := v.Delete(TEST_HASH); err != nil {
+	v.Put(context.Background(), TestHash, TestBlock)
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+
+	if err := v.Trash(TestHash); err != nil {
 		t.Error(err)
 	}
-	if _, err := v.Get(TEST_HASH); err == nil || !os.IsNotExist(err) {
-		t.Errorf("os.IsNotExist(%v) should have been true", err.Error())
+	data := make([]byte, BlockSize)
+	if _, err := v.Get(context.Background(), TestHash, data); err == nil || !os.IsNotExist(err) {
+		t.Errorf("os.IsNotExist(%v) should have been true", err)
+	}
+
+	_, err := v.Mtime(TestHash)
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+
+	err = v.Compare(context.Background(), TestHash, TestBlock)
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+
+	indexBuf := new(bytes.Buffer)
+	v.IndexTo("", indexBuf)
+	if strings.Contains(string(indexBuf.Bytes()), TestHash) {
+		t.Fatalf("Found trashed block in IndexTo")
+	}
+
+	err = v.Touch(TestHash)
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+}
+
+// Calling Delete() for a block that does not exist should result in error.
+// Test should pass for both writable and read-only volumes
+func testDeleteNoSuchBlock(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if err := v.Trash(TestHash2); err == nil {
+		t.Errorf("Expected error when attempting to delete a non-existing block")
+	}
+}
+
+// Invoke Status and verify that VolumeStatus is returned
+// Test should pass for both writable and read-only volumes
+func testStatus(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	// Get node status and make a basic sanity check.
+	status := v.Status()
+	if status.DeviceNum == 0 {
+		t.Errorf("uninitialized device_num in %v", status)
+	}
+
+	if status.BytesFree == 0 {
+		t.Errorf("uninitialized bytes_free in %v", status)
+	}
+
+	if status.BytesUsed == 0 {
+		t.Errorf("uninitialized bytes_used in %v", status)
+	}
+}
+
+// Invoke String for the volume; expect non-empty result
+// Test should pass for both writable and read-only volumes
+func testString(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if id := v.String(); len(id) == 0 {
+		t.Error("Got empty string for v.String()")
+	}
+}
+
+// Putting, updating, touching, and deleting blocks from a read-only volume result in error.
+// Test is intended for only read-only volumes
+func testUpdateReadOnly(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if v.Writable() == true {
+		return
+	}
+
+	v.PutRaw(TestHash, TestBlock)
+	buf := make([]byte, BlockSize)
+
+	// Get from read-only volume should succeed
+	_, err := v.Get(context.Background(), TestHash, buf)
+	if err != nil {
+		t.Errorf("got err %v, expected nil", err)
+	}
+
+	// Put a new block to read-only volume should result in error
+	err = v.Put(context.Background(), TestHash2, TestBlock2)
+	if err == nil {
+		t.Errorf("Expected error when putting block in a read-only volume")
+	}
+	_, err = v.Get(context.Background(), TestHash2, buf)
+	if err == nil {
+		t.Errorf("Expected error when getting block whose put in read-only volume failed")
+	}
+
+	// Touch a block in read-only volume should result in error
+	err = v.Touch(TestHash)
+	if err == nil {
+		t.Errorf("Expected error when touching block in a read-only volume")
+	}
+
+	// Delete a block from a read-only volume should result in error
+	err = v.Trash(TestHash)
+	if err == nil {
+		t.Errorf("Expected error when deleting block from a read-only volume")
+	}
+
+	// Overwriting an existing block in read-only volume should result in error
+	err = v.Put(context.Background(), TestHash, TestBlock)
+	if err == nil {
+		t.Errorf("Expected error when putting block in a read-only volume")
+	}
+}
+
+// Launch concurrent Gets
+// Test should pass for both writable and read-only volumes
+func testGetConcurrent(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	v.PutRaw(TestHash, TestBlock)
+	v.PutRaw(TestHash2, TestBlock2)
+	v.PutRaw(TestHash3, TestBlock3)
+
+	sem := make(chan int)
+	go func() {
+		buf := make([]byte, BlockSize)
+		n, err := v.Get(context.Background(), TestHash, buf)
+		if err != nil {
+			t.Errorf("err1: %v", err)
+		}
+		if bytes.Compare(buf[:n], TestBlock) != 0 {
+			t.Errorf("buf should be %s, is %s", string(TestBlock), string(buf[:n]))
+		}
+		sem <- 1
+	}()
+
+	go func() {
+		buf := make([]byte, BlockSize)
+		n, err := v.Get(context.Background(), TestHash2, buf)
+		if err != nil {
+			t.Errorf("err2: %v", err)
+		}
+		if bytes.Compare(buf[:n], TestBlock2) != 0 {
+			t.Errorf("buf should be %s, is %s", string(TestBlock2), string(buf[:n]))
+		}
+		sem <- 1
+	}()
+
+	go func() {
+		buf := make([]byte, BlockSize)
+		n, err := v.Get(context.Background(), TestHash3, buf)
+		if err != nil {
+			t.Errorf("err3: %v", err)
+		}
+		if bytes.Compare(buf[:n], TestBlock3) != 0 {
+			t.Errorf("buf should be %s, is %s", string(TestBlock3), string(buf[:n]))
+		}
+		sem <- 1
+	}()
+
+	// Wait for all goroutines to finish
+	for done := 0; done < 3; done++ {
+		<-sem
+	}
+}
+
+// Launch concurrent Puts
+// Test is intended for only writable volumes
+func testPutConcurrent(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if v.Writable() == false {
+		return
+	}
+
+	sem := make(chan int)
+	go func(sem chan int) {
+		err := v.Put(context.Background(), TestHash, TestBlock)
+		if err != nil {
+			t.Errorf("err1: %v", err)
+		}
+		sem <- 1
+	}(sem)
+
+	go func(sem chan int) {
+		err := v.Put(context.Background(), TestHash2, TestBlock2)
+		if err != nil {
+			t.Errorf("err2: %v", err)
+		}
+		sem <- 1
+	}(sem)
+
+	go func(sem chan int) {
+		err := v.Put(context.Background(), TestHash3, TestBlock3)
+		if err != nil {
+			t.Errorf("err3: %v", err)
+		}
+		sem <- 1
+	}(sem)
+
+	// Wait for all goroutines to finish
+	for done := 0; done < 3; done++ {
+		<-sem
+	}
+
+	// Double check that we actually wrote the blocks we expected to write.
+	buf := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), TestHash, buf)
+	if err != nil {
+		t.Errorf("Get #1: %v", err)
+	}
+	if bytes.Compare(buf[:n], TestBlock) != 0 {
+		t.Errorf("Get #1: expected %s, got %s", string(TestBlock), string(buf[:n]))
+	}
+
+	n, err = v.Get(context.Background(), TestHash2, buf)
+	if err != nil {
+		t.Errorf("Get #2: %v", err)
+	}
+	if bytes.Compare(buf[:n], TestBlock2) != 0 {
+		t.Errorf("Get #2: expected %s, got %s", string(TestBlock2), string(buf[:n]))
+	}
+
+	n, err = v.Get(context.Background(), TestHash3, buf)
+	if err != nil {
+		t.Errorf("Get #3: %v", err)
+	}
+	if bytes.Compare(buf[:n], TestBlock3) != 0 {
+		t.Errorf("Get #3: expected %s, got %s", string(TestBlock3), string(buf[:n]))
+	}
+}
+
+// Write and read back a full size block
+func testPutFullBlock(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+
+	if !v.Writable() {
+		return
+	}
+
+	wdata := make([]byte, BlockSize)
+	wdata[0] = 'a'
+	wdata[BlockSize-1] = 'z'
+	hash := fmt.Sprintf("%x", md5.Sum(wdata))
+	err := v.Put(context.Background(), hash, wdata)
+	if err != nil {
+		t.Fatal(err)
+	}
+	buf := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), hash, buf)
+	if err != nil {
+		t.Error(err)
+	}
+	if bytes.Compare(buf[:n], wdata) != 0 {
+		t.Error("buf %+q != wdata %+q", buf[:n], wdata)
+	}
+}
+
+// With TrashLifetime != 0, perform:
+// Trash an old block - which either raises ErrNotImplemented or succeeds
+// Untrash -  which either raises ErrNotImplemented or succeeds
+// Get - which must succeed
+func testTrashUntrash(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+	defer func() {
+		theConfig.TrashLifetime = 0
+	}()
+
+	theConfig.TrashLifetime.Set("1h")
+
+	// put block and backdate it
+	v.PutRaw(TestHash, TestBlock)
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+
+	buf := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), TestHash, buf)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if bytes.Compare(buf[:n], TestBlock) != 0 {
+		t.Errorf("Got data %+q, expected %+q", buf[:n], TestBlock)
+	}
+
+	// Trash
+	err = v.Trash(TestHash)
+	if v.Writable() == false {
+		if err != MethodDisabledError {
+			t.Fatal(err)
+		}
+	} else if err != nil {
+		if err != ErrNotImplemented {
+			t.Fatal(err)
+		}
+	} else {
+		_, err = v.Get(context.Background(), TestHash, buf)
+		if err == nil || !os.IsNotExist(err) {
+			t.Errorf("os.IsNotExist(%v) should have been true", err)
+		}
+
+		// Untrash
+		err = v.Untrash(TestHash)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	// Get the block - after trash and untrash sequence
+	n, err = v.Get(context.Background(), TestHash, buf)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if bytes.Compare(buf[:n], TestBlock) != 0 {
+		t.Errorf("Got data %+q, expected %+q", buf[:n], TestBlock)
+	}
+}
+
+func testTrashEmptyTrashUntrash(t TB, factory TestableVolumeFactory) {
+	v := factory(t)
+	defer v.Teardown()
+	defer func(orig arvados.Duration) {
+		theConfig.TrashLifetime = orig
+	}(theConfig.TrashLifetime)
+
+	checkGet := func() error {
+		buf := make([]byte, BlockSize)
+		n, err := v.Get(context.Background(), TestHash, buf)
+		if err != nil {
+			return err
+		}
+		if bytes.Compare(buf[:n], TestBlock) != 0 {
+			t.Fatalf("Got data %+q, expected %+q", buf[:n], TestBlock)
+		}
+
+		_, err = v.Mtime(TestHash)
+		if err != nil {
+			return err
+		}
+
+		err = v.Compare(context.Background(), TestHash, TestBlock)
+		if err != nil {
+			return err
+		}
+
+		indexBuf := new(bytes.Buffer)
+		v.IndexTo("", indexBuf)
+		if !strings.Contains(string(indexBuf.Bytes()), TestHash) {
+			return os.ErrNotExist
+		}
+
+		return nil
+	}
+
+	// First set: EmptyTrash before reaching the trash deadline.
+
+	theConfig.TrashLifetime.Set("1h")
+
+	v.PutRaw(TestHash, TestBlock)
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+
+	err := checkGet()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Trash the block
+	err = v.Trash(TestHash)
+	if err == MethodDisabledError || err == ErrNotImplemented {
+		// Skip the trash tests for read-only volumes, and
+		// volume types that don't support TrashLifetime>0.
+		return
+	}
+
+	err = checkGet()
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+
+	err = v.Touch(TestHash)
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+
+	v.EmptyTrash()
+
+	// Even after emptying the trash, we can untrash our block
+	// because the deadline hasn't been reached.
+	err = v.Untrash(TestHash)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = checkGet()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = v.Touch(TestHash)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Because we Touch'ed, need to backdate again for next set of tests
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+
+	// If the only block in the trash has already been untrashed,
+	// most volumes will fail a subsequent Untrash with a 404, but
+	// it's also acceptable for Untrash to succeed.
+	err = v.Untrash(TestHash)
+	if err != nil && !os.IsNotExist(err) {
+		t.Fatalf("Expected success or os.IsNotExist(), but got: %v", err)
+	}
+
+	// The additional Untrash should not interfere with our
+	// already-untrashed copy.
+	err = checkGet()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Untrash might have updated the timestamp, so backdate again
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+
+	// Second set: EmptyTrash after the trash deadline has passed.
+
+	theConfig.TrashLifetime.Set("1ns")
+
+	err = v.Trash(TestHash)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = checkGet()
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+
+	// Even though 1ns has passed, we can untrash because we
+	// haven't called EmptyTrash yet.
+	err = v.Untrash(TestHash)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = checkGet()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Trash it again, and this time call EmptyTrash so it really
+	// goes away.
+	// (In Azure volumes, un/trash changes Mtime, so first backdate again)
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+	err = v.Trash(TestHash)
+	err = checkGet()
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+	v.EmptyTrash()
+
+	// Untrash won't find it
+	err = v.Untrash(TestHash)
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+
+	// Get block won't find it
+	err = checkGet()
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+
+	// Third set: If the same data block gets written again after
+	// being trashed, and then the trash gets emptied, the newer
+	// un-trashed copy doesn't get deleted along with it.
+
+	v.PutRaw(TestHash, TestBlock)
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+
+	theConfig.TrashLifetime.Set("1ns")
+	err = v.Trash(TestHash)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = checkGet()
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("os.IsNotExist(%v) should have been true", err)
+	}
+
+	v.PutRaw(TestHash, TestBlock)
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+
+	// EmptyTrash should not delete the untrashed copy.
+	v.EmptyTrash()
+	err = checkGet()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Fourth set: If the same data block gets trashed twice with
+	// different deadlines A and C, and then the trash is emptied
+	// at intermediate time B (A < B < C), it is still possible to
+	// untrash the block whose deadline is "C".
+
+	v.PutRaw(TestHash, TestBlock)
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+
+	theConfig.TrashLifetime.Set("1ns")
+	err = v.Trash(TestHash)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	v.PutRaw(TestHash, TestBlock)
+	v.TouchWithDate(TestHash, time.Now().Add(-2*theConfig.BlobSignatureTTL.Duration()))
+
+	theConfig.TrashLifetime.Set("1h")
+	err = v.Trash(TestHash)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// EmptyTrash should not prevent us from recovering the
+	// time.Hour ("C") trash
+	v.EmptyTrash()
+	err = v.Untrash(TestHash)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = checkGet()
+	if err != nil {
+		t.Fatal(err)
 	}
 }