X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/2174d59b367e5b2000472cf8b521a155b952b543..554fe927169e928d91c2d8c4bed158aef4d4d746:/services/keepstore/volume_generic_test.go

diff --git a/services/keepstore/volume_generic_test.go b/services/keepstore/volume_generic_test.go
index e168940fdd..7e72a8f246 100644
--- a/services/keepstore/volume_generic_test.go
+++ b/services/keepstore/volume_generic_test.go
@@ -2,14 +2,17 @@ package main
 
 import (
 	"bytes"
+	"context"
 	"crypto/md5"
 	"fmt"
 	"os"
 	"regexp"
 	"sort"
+	"strconv"
 	"strings"
 	"time"
 
+	"git.curoverse.com/arvados.git/sdk/go/arvados"
 	"git.curoverse.com/arvados.git/sdk/go/arvadostest"
 )
 
@@ -76,6 +79,9 @@ func DoGenericVolumeTests(t TB, factory TestableVolumeFactory) {
 	testPutConcurrent(t, factory)
 
 	testPutFullBlock(t, factory)
+
+	testTrashUntrash(t, factory)
+	testTrashEmptyTrashUntrash(t, factory)
 }
 
 // Put a test block, get it and verify content
@@ -86,14 +92,13 @@ func testGet(t TB, factory TestableVolumeFactory) {
 
 	v.PutRaw(TestHash, TestBlock)
 
-	buf, err := v.Get(TestHash)
+	buf := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), TestHash, buf)
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	bufs.Put(buf)
-
-	if bytes.Compare(buf, TestBlock) != 0 {
+	if bytes.Compare(buf[:n], TestBlock) != 0 {
 		t.Errorf("expected %s, got %s", string(TestBlock), string(buf))
 	}
 }
@@ -104,7 +109,8 @@ func testGetNoSuchBlock(t TB, factory TestableVolumeFactory) {
 	v := factory(t)
 	defer v.Teardown()
 
-	if _, err := v.Get(TestHash2); err == nil {
+	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)
 	}
 }
@@ -116,7 +122,7 @@ func testCompareNonexistent(t TB, factory TestableVolumeFactory) {
 	v := factory(t)
 	defer v.Teardown()
 
-	err := v.Compare(TestHash, TestBlock)
+	err := v.Compare(context.Background(), TestHash, TestBlock)
 	if err != os.ErrNotExist {
 		t.Errorf("Got err %T %q, expected os.ErrNotExist", err, err)
 	}
@@ -131,7 +137,7 @@ func testCompareSameContent(t TB, factory TestableVolumeFactory, testHash string
 	v.PutRaw(testHash, testData)
 
 	// Compare the block locator with same content
-	err := v.Compare(testHash, testData)
+	err := v.Compare(context.Background(), testHash, testData)
 	if err != nil {
 		t.Errorf("Got err %q, expected nil", err)
 	}
@@ -149,7 +155,7 @@ func testCompareWithCollision(t TB, factory TestableVolumeFactory, testHash stri
 	v.PutRaw(testHash, testDataA)
 
 	// Compare the block locator with different content; collision
-	err := v.Compare(TestHash, testDataB)
+	err := v.Compare(context.Background(), TestHash, testDataB)
 	if err == nil {
 		t.Errorf("Got err nil, expected error due to collision")
 	}
@@ -165,7 +171,7 @@ func testCompareWithCorruptStoredData(t TB, factory TestableVolumeFactory, testH
 
 	v.PutRaw(TestHash, testDataB)
 
-	err := v.Compare(testHash, testDataA)
+	err := v.Compare(context.Background(), testHash, testDataA)
 	if err == nil || err == CollisionError {
 		t.Errorf("Got err %+v, expected non-collision error", err)
 	}
@@ -181,12 +187,12 @@ func testPutBlockWithSameContent(t TB, factory TestableVolumeFactory, testHash s
 		return
 	}
 
-	err := v.Put(testHash, testData)
+	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(testHash, testData)
+	err = v.Put(context.Background(), testHash, testData)
 	if err != nil {
 		t.Errorf("Got err putting block second time %q: %q, expected nil", TestBlock, err)
 	}
@@ -204,25 +210,23 @@ func testPutBlockWithDifferentContent(t TB, factory TestableVolumeFactory, testH
 
 	v.PutRaw(testHash, testDataA)
 
-	putErr := v.Put(testHash, testDataB)
-	buf, getErr := v.Get(testHash)
+	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, testDataB) != 0 {
-			t.Errorf("Put succeeded but Get returned %+q, expected %+q", buf, testDataB)
+		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, testDataA) != 0 && bytes.Compare(buf, testDataB) != 0 {
-			t.Errorf("Put failed but Get returned %+q, which is neither %+q nor %+q", buf, testDataA, testDataB)
+		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)
 		}
 	}
-	if getErr == nil {
-		bufs.Put(buf)
-	}
 }
 
 // Put and get multiple blocks
@@ -235,49 +239,47 @@ func testPutMultipleBlocks(t TB, factory TestableVolumeFactory) {
 		return
 	}
 
-	err := v.Put(TestHash, TestBlock)
+	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(TestHash2, TestBlock2)
+	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(TestHash3, TestBlock3)
+	err = v.Put(context.Background(), TestHash3, TestBlock3)
 	if err != nil {
 		t.Errorf("Got err putting block %q: %q, expected nil", TestBlock3, err)
 	}
 
-	data, err := v.Get(TestHash)
+	data := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), TestHash, data)
 	if err != nil {
 		t.Error(err)
 	} else {
-		if bytes.Compare(data, TestBlock) != 0 {
-			t.Errorf("Block present, but got %+q, expected %+q", data, TestBlock)
+		if bytes.Compare(data[:n], TestBlock) != 0 {
+			t.Errorf("Block present, but got %+q, expected %+q", data[:n], TestBlock)
 		}
-		bufs.Put(data)
 	}
 
-	data, err = v.Get(TestHash2)
+	n, err = v.Get(context.Background(), TestHash2, data)
 	if err != nil {
 		t.Error(err)
 	} else {
-		if bytes.Compare(data, TestBlock2) != 0 {
-			t.Errorf("Block present, but got %+q, expected %+q", data, TestBlock2)
+		if bytes.Compare(data[:n], TestBlock2) != 0 {
+			t.Errorf("Block present, but got %+q, expected %+q", data[:n], TestBlock2)
 		}
-		bufs.Put(data)
 	}
 
-	data, err = v.Get(TestHash3)
+	n, err = v.Get(context.Background(), TestHash3, data)
 	if err != nil {
 		t.Error(err)
 	} else {
-		if bytes.Compare(data, TestBlock3) != 0 {
-			t.Errorf("Block present, but to %+q, expected %+q", data, TestBlock3)
+		if bytes.Compare(data[:n], TestBlock3) != 0 {
+			t.Errorf("Block present, but to %+q, expected %+q", data[:n], TestBlock3)
 		}
-		bufs.Put(data)
 	}
 }
 
@@ -293,7 +295,7 @@ func testPutAndTouch(t TB, factory TestableVolumeFactory) {
 		return
 	}
 
-	if err := v.Put(TestHash, TestBlock); err != nil {
+	if err := v.Put(context.Background(), TestHash, TestBlock); err != nil {
 		t.Error(err)
 	}
 
@@ -313,7 +315,7 @@ func testPutAndTouch(t TB, factory TestableVolumeFactory) {
 	}
 
 	// Write the same block again.
-	if err := v.Put(TestHash, TestBlock); err != nil {
+	if err := v.Put(context.Background(), TestHash, TestBlock); err != nil {
 		t.Error(err)
 	}
 
@@ -356,10 +358,22 @@ 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)
@@ -372,15 +386,21 @@ func testIndexTo(t TB, factory TestableVolumeFactory) {
 	indexRows := strings.Split(string(buf.Bytes()), "\n")
 	sort.Strings(indexRows)
 	sortedIndex := strings.Join(indexRows, "\n")
-	m, err := regexp.MatchString(
-		`^\n`+TestHash+`\+\d+ \d+\n`+
-			TestHash3+`\+\d+ \d+\n`+
-			TestHash2+`\+\d+ \d+$`,
-		sortedIndex)
-	if err != nil {
-		t.Error(err)
-	} else if !m {
+	m := regexp.MustCompile(
+		`^\n` + TestHash + `\+\d+ (\d+)\n` +
+			TestHash3 + `\+\d+ \d+\n` +
+			TestHash2 + `\+\d+ \d+$`,
+	).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"} {
@@ -397,7 +417,7 @@ func testIndexTo(t TB, factory TestableVolumeFactory) {
 
 	for _, prefix := range []string{"zero", "zip", "zilch"} {
 		buf = new(bytes.Buffer)
-		v.IndexTo(prefix, buf)
+		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 {
@@ -412,49 +432,69 @@ func testIndexTo(t TB, factory TestableVolumeFactory) {
 func testDeleteNewBlock(t TB, factory TestableVolumeFactory) {
 	v := factory(t)
 	defer v.Teardown()
-	blobSignatureTTL = 300 * time.Second
+	theConfig.BlobSignatureTTL.Set("5m")
 
 	if v.Writable() == false {
 		return
 	}
 
-	v.Put(TestHash, TestBlock)
+	v.Put(context.Background(), TestHash, TestBlock)
 
 	if err := v.Trash(TestHash); err != nil {
 		t.Error(err)
 	}
-	data, err := v.Get(TestHash)
+	data := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), TestHash, data)
 	if err != nil {
 		t.Error(err)
-	} else {
-		if bytes.Compare(data, TestBlock) != 0 {
-			t.Errorf("Got data %+q, expected %+q", data, TestBlock)
-		}
-		bufs.Put(data)
+	} 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
-// blobSignatureTTL seconds in the past should delete the data.
+// 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()
-	blobSignatureTTL = 300 * time.Second
+	theConfig.BlobSignatureTTL.Set("5m")
 
 	if v.Writable() == false {
 		return
 	}
 
-	v.Put(TestHash, TestBlock)
-	v.TouchWithDate(TestHash, time.Now().Add(-2*blobSignatureTTL))
+	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(TestHash); err == nil || !os.IsNotExist(err) {
+	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.
@@ -511,19 +551,20 @@ func testUpdateReadOnly(t TB, factory TestableVolumeFactory) {
 	}
 
 	v.PutRaw(TestHash, TestBlock)
+	buf := make([]byte, BlockSize)
 
 	// Get from read-only volume should succeed
-	_, err := v.Get(TestHash)
+	_, 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(TestHash2, TestBlock2)
+	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(TestHash2)
+	_, err = v.Get(context.Background(), TestHash2, buf)
 	if err == nil {
 		t.Errorf("Expected error when getting block whose put in read-only volume failed")
 	}
@@ -541,7 +582,7 @@ func testUpdateReadOnly(t TB, factory TestableVolumeFactory) {
 	}
 
 	// Overwriting an existing block in read-only volume should result in error
-	err = v.Put(TestHash, TestBlock)
+	err = v.Put(context.Background(), TestHash, TestBlock)
 	if err == nil {
 		t.Errorf("Expected error when putting block in a read-only volume")
 	}
@@ -558,45 +599,45 @@ func testGetConcurrent(t TB, factory TestableVolumeFactory) {
 	v.PutRaw(TestHash3, TestBlock3)
 
 	sem := make(chan int)
-	go func(sem chan int) {
-		buf, err := v.Get(TestHash)
+	go func() {
+		buf := make([]byte, BlockSize)
+		n, err := v.Get(context.Background(), TestHash, buf)
 		if err != nil {
 			t.Errorf("err1: %v", err)
 		}
-		bufs.Put(buf)
-		if bytes.Compare(buf, TestBlock) != 0 {
-			t.Errorf("buf should be %s, is %s", string(TestBlock), string(buf))
+		if bytes.Compare(buf[:n], TestBlock) != 0 {
+			t.Errorf("buf should be %s, is %s", string(TestBlock), string(buf[:n]))
 		}
 		sem <- 1
-	}(sem)
+	}()
 
-	go func(sem chan int) {
-		buf, err := v.Get(TestHash2)
+	go func() {
+		buf := make([]byte, BlockSize)
+		n, err := v.Get(context.Background(), TestHash2, buf)
 		if err != nil {
 			t.Errorf("err2: %v", err)
 		}
-		bufs.Put(buf)
-		if bytes.Compare(buf, TestBlock2) != 0 {
-			t.Errorf("buf should be %s, is %s", string(TestBlock2), string(buf))
+		if bytes.Compare(buf[:n], TestBlock2) != 0 {
+			t.Errorf("buf should be %s, is %s", string(TestBlock2), string(buf[:n]))
 		}
 		sem <- 1
-	}(sem)
+	}()
 
-	go func(sem chan int) {
-		buf, err := v.Get(TestHash3)
+	go func() {
+		buf := make([]byte, BlockSize)
+		n, err := v.Get(context.Background(), TestHash3, buf)
 		if err != nil {
 			t.Errorf("err3: %v", err)
 		}
-		bufs.Put(buf)
-		if bytes.Compare(buf, TestBlock3) != 0 {
-			t.Errorf("buf should be %s, is %s", string(TestBlock3), string(buf))
+		if bytes.Compare(buf[:n], TestBlock3) != 0 {
+			t.Errorf("buf should be %s, is %s", string(TestBlock3), string(buf[:n]))
 		}
 		sem <- 1
-	}(sem)
+	}()
 
 	// Wait for all goroutines to finish
-	for done := 0; done < 3; {
-		done += <-sem
+	for done := 0; done < 3; done++ {
+		<-sem
 	}
 }
 
@@ -612,7 +653,7 @@ func testPutConcurrent(t TB, factory TestableVolumeFactory) {
 
 	sem := make(chan int)
 	go func(sem chan int) {
-		err := v.Put(TestHash, TestBlock)
+		err := v.Put(context.Background(), TestHash, TestBlock)
 		if err != nil {
 			t.Errorf("err1: %v", err)
 		}
@@ -620,7 +661,7 @@ func testPutConcurrent(t TB, factory TestableVolumeFactory) {
 	}(sem)
 
 	go func(sem chan int) {
-		err := v.Put(TestHash2, TestBlock2)
+		err := v.Put(context.Background(), TestHash2, TestBlock2)
 		if err != nil {
 			t.Errorf("err2: %v", err)
 		}
@@ -628,7 +669,7 @@ func testPutConcurrent(t TB, factory TestableVolumeFactory) {
 	}(sem)
 
 	go func(sem chan int) {
-		err := v.Put(TestHash3, TestBlock3)
+		err := v.Put(context.Background(), TestHash3, TestBlock3)
 		if err != nil {
 			t.Errorf("err3: %v", err)
 		}
@@ -636,36 +677,34 @@ func testPutConcurrent(t TB, factory TestableVolumeFactory) {
 	}(sem)
 
 	// Wait for all goroutines to finish
-	for done := 0; done < 3; {
-		done += <-sem
+	for done := 0; done < 3; done++ {
+		<-sem
 	}
 
 	// Double check that we actually wrote the blocks we expected to write.
-	buf, err := v.Get(TestHash)
+	buf := make([]byte, BlockSize)
+	n, err := v.Get(context.Background(), TestHash, buf)
 	if err != nil {
 		t.Errorf("Get #1: %v", err)
 	}
-	bufs.Put(buf)
-	if bytes.Compare(buf, TestBlock) != 0 {
-		t.Errorf("Get #1: expected %s, got %s", string(TestBlock), string(buf))
+	if bytes.Compare(buf[:n], TestBlock) != 0 {
+		t.Errorf("Get #1: expected %s, got %s", string(TestBlock), string(buf[:n]))
 	}
 
-	buf, err = v.Get(TestHash2)
+	n, err = v.Get(context.Background(), TestHash2, buf)
 	if err != nil {
 		t.Errorf("Get #2: %v", err)
 	}
-	bufs.Put(buf)
-	if bytes.Compare(buf, TestBlock2) != 0 {
-		t.Errorf("Get #2: expected %s, got %s", string(TestBlock2), string(buf))
+	if bytes.Compare(buf[:n], TestBlock2) != 0 {
+		t.Errorf("Get #2: expected %s, got %s", string(TestBlock2), string(buf[:n]))
 	}
 
-	buf, err = v.Get(TestHash3)
+	n, err = v.Get(context.Background(), TestHash3, buf)
 	if err != nil {
 		t.Errorf("Get #3: %v", err)
 	}
-	bufs.Put(buf)
-	if bytes.Compare(buf, TestBlock3) != 0 {
-		t.Errorf("Get #3: expected %s, got %s", string(TestBlock3), string(buf))
+	if bytes.Compare(buf[:n], TestBlock3) != 0 {
+		t.Errorf("Get #3: expected %s, got %s", string(TestBlock3), string(buf[:n]))
 	}
 }
 
@@ -682,17 +721,291 @@ func testPutFullBlock(t TB, factory TestableVolumeFactory) {
 	wdata[0] = 'a'
 	wdata[BlockSize-1] = 'z'
 	hash := fmt.Sprintf("%x", md5.Sum(wdata))
-	err := v.Put(hash, wdata)
+	err := v.Put(context.Background(), hash, wdata)
 	if err != nil {
 		t.Fatal(err)
 	}
-	rdata, err := v.Get(hash)
+	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 {
-		defer bufs.Put(rdata)
+		_, 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)
 	}
-	if bytes.Compare(rdata, wdata) != 0 {
-		t.Error("rdata != wdata")
+}
+
+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)
 	}
 }