@Test
public void testDownloadPages() throws StorageException, URISyntaxException, IOException {
int blobLengthToUse = 8 * 512;
byte[] buffer = BlobTestHelper.getRandomBuffer(8 * 512);
String blobName = BlobTestHelper.generateRandomBlobNameWithPrefix("testblob");
final CloudPageBlob blobRef = this.container.getPageBlobReference(blobName);
blobRef.create(blobLengthToUse);
// Upload one page (page 0)
ByteArrayInputStream inputStream = new ByteArrayInputStream(buffer);
blobRef.uploadPages(inputStream, 0, 512);
// Upload pages 2-4
inputStream = new ByteArrayInputStream(buffer, 512, 3 * 512);
blobRef.uploadPages(inputStream, 2 * 512, 3 * 512);
// Now, we expect the first 512 bytes of the blob to be the first 512 bytes of the random buffer
// (page 0)
// the next 512 bytes should be 0 (page 1)
// The next 3 * 512 bytes should be equal to bytes (512 -> 4 * 512) of the random buffer (pages
// 2-4)
// The next 3 * 512 bytes should be 0 (pages 5-7)
ArrayList<PageRange> actualPageRanges = blobRef.downloadPageRanges();
ArrayList<PageRange> expectedPageRanges = new ArrayList<PageRange>();
expectedPageRanges.add(new PageRange(0, 512 - 1));
expectedPageRanges.add(new PageRange(2 * 512, 2 * 512 + 3 * 512 - 1));
assertEquals(expectedPageRanges.size(), actualPageRanges.size());
for (int i = 0; i < expectedPageRanges.size(); i++) {
assertEquals(
expectedPageRanges.get(i).getStartOffset(), actualPageRanges.get(i).getStartOffset());
assertEquals(
expectedPageRanges.get(i).getEndOffset(), actualPageRanges.get(i).getEndOffset());
}
}
@Test
public void testClearPages() throws URISyntaxException, StorageException, IOException {
int blobLengthToUse = 8 * 512;
byte[] buffer = BlobTestHelper.getRandomBuffer(8 * 512);
String blobName = BlobTestHelper.generateRandomBlobNameWithPrefix("testblob");
final CloudPageBlob blobRef = this.container.getPageBlobReference(blobName);
blobRef.create(blobLengthToUse);
assertNull(blobRef.getProperties().getPageBlobSequenceNumber());
// Upload one page (page 0)
ByteArrayInputStream inputStream = new ByteArrayInputStream(buffer);
blobRef.uploadPages(inputStream, 0, blobLengthToUse);
assertNotNull(blobRef.getProperties().getPageBlobSequenceNumber());
try {
blobRef.clearPages(0, 256);
fail("Did not throw expected exception on non-512-byte-aligned length");
} catch (IllegalArgumentException ex) {
assertEquals(SR.INVALID_PAGE_BLOB_LENGTH, ex.getMessage());
}
try {
blobRef.clearPages(3 * 256, 3 * 512);
fail("Did not throw expected exception on non-512-byte-aligned offset");
} catch (IllegalArgumentException ex) {
assertEquals(SR.INVALID_PAGE_START_OFFSET, ex.getMessage());
}
blobRef.clearPages(3 * 512, 2 * 512);
assertNotNull(blobRef.getProperties().getPageBlobSequenceNumber());
byte[] result = new byte[blobLengthToUse];
blobRef.downloadToByteArray(result, 0);
int i = 0;
for (; i < 3 * 512; i++) {
assertEquals(buffer[i], result[i]);
}
for (; i < 5 * 512; i++) {
assertEquals(0, result[i]);
}
for (; i < 8 * 512; i++) {
assertEquals(buffer[i], result[i]);
}
}
@Test
public void testUploadPages() throws URISyntaxException, StorageException, IOException {
int blobLengthToUse = 8 * 512;
byte[] buffer = BlobTestHelper.getRandomBuffer(8 * 512);
String blobName = BlobTestHelper.generateRandomBlobNameWithPrefix("testblob");
final CloudPageBlob blobRef = this.container.getPageBlobReference(blobName);
blobRef.create(blobLengthToUse);
assertNull(blobRef.getProperties().getPageBlobSequenceNumber());
// Upload one page (page 0)
ByteArrayInputStream inputStream = new ByteArrayInputStream(buffer);
blobRef.uploadPages(inputStream, 0, 512);
assertNotNull(blobRef.getProperties().getPageBlobSequenceNumber());
// Upload pages 2-4
inputStream = new ByteArrayInputStream(buffer, 512, 3 * 512);
blobRef.uploadPages(inputStream, 2 * 512, 3 * 512);
assertNotNull(blobRef.getProperties().getPageBlobSequenceNumber());
// Now, we expect the first 512 bytes of the blob to be the first 512 bytes of the random buffer
// (page 0)
// the next 512 bytes should be 0 (page 1)
// The next 3 * 512 bytes should be equal to bytes (512 -> 4 * 512) of the random buffer (pages
// 2-4)
// The next 3 * 512 bytes should be 0 (pages 5-7)
byte[] result = new byte[blobLengthToUse];
blobRef.downloadToByteArray(result, 0);
for (int i = 0; i < 512; i++) {
assertEquals(buffer[i], result[i]);
}
for (int i = 0; i < 512; i++) {
assertEquals(0, result[i + 512]);
}
for (int i = 0; i < 3 * 512; i++) {
assertEquals(buffer[i + 512], result[i + 2 * 512]);
}
for (int i = 0; i < 3 * 512; i++) {
assertEquals(0, result[i + 5 * 512]);
}
inputStream = new ByteArrayInputStream(buffer);
try {
blobRef.uploadPages(inputStream, 0, 256);
fail("Did not throw expected exception on non-512-byte-aligned length");
} catch (IllegalArgumentException ex) {
assertEquals(SR.INVALID_PAGE_BLOB_LENGTH, ex.getMessage());
}
try {
blobRef.uploadPages(inputStream, 3 * 256, 3 * 512);
fail("Did not throw expected exception on non-512-byte-aligned offset");
} catch (IllegalArgumentException ex) {
assertEquals(SR.INVALID_PAGE_START_OFFSET, ex.getMessage());
}
}