+ 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(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(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(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(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(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(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(testHash, testData)
+ if err != nil {
+ t.Errorf("Got err putting block %q: %q, expected nil", TestBlock, err)
+ }
+
+ err = v.Put(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(testHash, testDataB)
+ buf := make([]byte, BlockSize)
+ n, getErr := v.Get(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(TestHash, TestBlock)
+ if err != nil {
+ t.Errorf("Got err putting block %q: %q, expected nil", TestBlock, err)
+ }
+
+ err = v.Put(TestHash2, TestBlock2)
+ if err != nil {
+ t.Errorf("Got err putting block %q: %q, expected nil", TestBlock2, err)
+ }
+
+ err = v.Put(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(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(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(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)
+ }
+ }