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commit 2e17ce27e35838134b95ab14da30bed4625b2a54
Author: Rene Cordier <[email protected]>
AuthorDate: Mon Jul 15 14:37:20 2019 +0700

    JAMES-2829 add delete tests methods to a new DeleteBlobStoreContract
---
 .../james/blob/api/DeleteBlobStoreContract.java    | 165 +++++++++++++++++++++
 1 file changed, 165 insertions(+)

diff --git 
a/server/blob/blob-api/src/test/java/org/apache/james/blob/api/DeleteBlobStoreContract.java
 
b/server/blob/blob-api/src/test/java/org/apache/james/blob/api/DeleteBlobStoreContract.java
new file mode 100644
index 0000000..1602a6f
--- /dev/null
+++ 
b/server/blob/blob-api/src/test/java/org/apache/james/blob/api/DeleteBlobStoreContract.java
@@ -0,0 +1,165 @@
+/****************************************************************
+ * Licensed to the Apache Software Foundation (ASF) under one   *
+ * or more contributor license agreements.  See the NOTICE file *
+ * distributed with this work for additional information        *
+ * regarding copyright ownership.  The ASF licenses this file   *
+ * to you under the Apache License, Version 2.0 (the            *
+ * "License"); you may not use this file except in compliance   *
+ * with the License.  You may obtain a copy of the License at   *
+ *                                                              *
+ *   http://www.apache.org/licenses/LICENSE-2.0                 *
+ *                                                              *
+ * Unless required by applicable law or agreed to in writing,   *
+ * software distributed under the License is distributed on an  *
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
+ * KIND, either express or implied.  See the License for the    *
+ * specific language governing permissions and limitations      *
+ * under the License.                                           *
+ ****************************************************************/
+
+package org.apache.james.blob.api;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.time.Duration;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.james.util.concurrency.ConcurrentTestRunner;
+import org.junit.jupiter.api.Test;
+
+import com.google.common.base.Strings;
+
+public interface DeleteBlobStoreContract {
+
+    String SHORT_STRING = "toto";
+    byte[] SHORT_BYTEARRAY = SHORT_STRING.getBytes(StandardCharsets.UTF_8);
+    byte[] ELEVEN_KILOBYTES = Strings.repeat("0123456789\n", 
1000).getBytes(StandardCharsets.UTF_8);
+    String TWELVE_MEGABYTES_STRING = Strings.repeat("0123456789\r\n", 1024 * 
1024);
+    byte[] TWELVE_MEGABYTES = 
TWELVE_MEGABYTES_STRING.getBytes(StandardCharsets.UTF_8);
+    BucketName CUSTOM = BucketName.of("custom");
+
+    BlobStore testee();
+
+    BlobId.Factory blobIdFactory();
+
+    @Test
+    default void deleteShouldNotThrowWhenBlobDoesNotExist() {
+        BucketName defaultBucketName = testee().getDefaultBucketName();
+
+        assertThatCode(() -> testee().delete(defaultBucketName, 
blobIdFactory().randomId()).block())
+            .doesNotThrowAnyException();
+    }
+
+    @Test
+    default void deleteShouldDeleteExistingBlobData() {
+        BucketName defaultBucketName = testee().getDefaultBucketName();
+
+        BlobId blobId = testee().save(defaultBucketName, 
SHORT_BYTEARRAY).block();
+        testee().delete(defaultBucketName, blobId).block();
+
+        assertThatThrownBy(() -> testee().read(defaultBucketName, blobId))
+            .isInstanceOf(ObjectStoreException.class);
+    }
+
+    @Test
+    default void deleteShouldBeIdempotent() {
+        BucketName defaultBucketName = testee().getDefaultBucketName();
+
+        BlobId blobId = testee().save(defaultBucketName, 
SHORT_BYTEARRAY).block();
+        testee().delete(defaultBucketName, blobId).block();
+
+        assertThatCode(() -> testee().delete(defaultBucketName, 
blobId).block())
+            .doesNotThrowAnyException();
+    }
+
+    @Test
+    default void deleteShouldNotDeleteOtherBlobs() {
+        BucketName defaultBucketName = testee().getDefaultBucketName();
+
+        BlobId blobIdToDelete = testee().save(defaultBucketName, 
SHORT_BYTEARRAY).block();
+        BlobId otherBlobId = testee().save(defaultBucketName, 
ELEVEN_KILOBYTES).block();
+
+        testee().delete(defaultBucketName, blobIdToDelete).block();
+
+        InputStream read = testee().read(defaultBucketName, otherBlobId);
+
+        assertThat(read).hasSameContentAs(new 
ByteArrayInputStream(ELEVEN_KILOBYTES));
+    }
+
+    @Test
+    default void deleteConcurrentlyShouldNotFail() throws Exception {
+        BucketName defaultBucketName = testee().getDefaultBucketName();
+
+        BlobId blobId = testee().save(defaultBucketName, 
TWELVE_MEGABYTES).block();
+
+        ConcurrentTestRunner.builder()
+            .operation(((threadNumber, step) -> 
testee().delete(defaultBucketName, blobId).block()))
+            .threadCount(10)
+            .operationCount(10)
+            .runSuccessfullyWithin(Duration.ofMinutes(1));
+    }
+
+    @Test
+    default void deleteShouldThrowWhenNullBucketName() {
+        assertThatThrownBy(() -> testee().delete(null, 
blobIdFactory().randomId()).block())
+            .isInstanceOf(NullPointerException.class);
+    }
+
+    @Test
+    default void deleteShouldNotDeleteFromOtherBucket() {
+        BucketName defaultBucketName = testee().getDefaultBucketName();
+
+        BlobId customBlobId = testee().save(CUSTOM, "custom_string").block();
+        BlobId defaultBlobId = testee().save(defaultBucketName, 
SHORT_BYTEARRAY).block();
+
+        testee().delete(CUSTOM, customBlobId).block();
+
+        InputStream read = testee().read(defaultBucketName, defaultBlobId);
+
+        assertThat(read).hasSameContentAs(new 
ByteArrayInputStream(SHORT_BYTEARRAY));
+    }
+
+    @Test
+    default void deleteShouldNotDeleteFromOtherBucketWhenSameBlobId() {
+        BucketName defaultBucketName = testee().getDefaultBucketName();
+
+        testee().save(CUSTOM, SHORT_BYTEARRAY).block();
+        BlobId blobId = testee().save(defaultBucketName, 
SHORT_BYTEARRAY).block();
+
+        testee().delete(defaultBucketName, blobId).block();
+
+        InputStream read = testee().read(CUSTOM, blobId);
+
+        assertThat(read).hasSameContentAs(new 
ByteArrayInputStream(SHORT_BYTEARRAY));
+    }
+
+    @Test
+    default void readShouldNotReadPartiallyWhenDeletingConcurrentlyBigBlob() 
throws Exception {
+        BucketName defaultBucketName = testee().getDefaultBucketName();
+
+        BlobId blobId = testee().save(defaultBucketName, 
TWELVE_MEGABYTES).block();
+
+        ConcurrentTestRunner.builder()
+            .operation(((threadNumber, step) -> {
+                try {
+                    InputStream read = testee().read(defaultBucketName, 
blobId);
+
+                    if (!IOUtils.toString(read, 
StandardCharsets.UTF_8).equals(TWELVE_MEGABYTES_STRING)) {
+                        throw new RuntimeException("Should not read partial 
blob when an other thread is deleting it");
+                    }
+                } catch (ObjectStoreException exception) {
+                    // normal behavior here
+                }
+
+                testee().delete(defaultBucketName, blobId).block();
+            }))
+            .threadCount(10)
+            .operationCount(10)
+            .runSuccessfullyWithin(Duration.ofMinutes(1));
+    }
+}


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