Allow WriterOptionsBuilder to set ttl to 0.

Value 0 tells the Cassandra driver to disable the ttl.

Original pull request: #1270.
Closes #1262

spring-data-cassandra/src/main/java/org/springframework/data/cassandra/core/cql/WriteOptions.java

@@ -153,6 +153,7 @@ public class WriteOptions extends QueryOptions {
 	 * @author Mark Paluch
 	 * @author Lukasz Antoniak
 	 * @author Thomas Strauß
+	 * @author Tudor Marc
 	 * @since 1.5
 	 */
 	public static class WriteOptionsBuilder extends QueryOptionsBuilder {
@@ -341,7 +342,7 @@ public class WriteOptions extends QueryOptions {
 		public WriteOptionsBuilder ttl(Duration ttl) {
 
 			Assert.notNull(ttl, "TTL must not be null");
-			Assert.isTrue(!ttl.isNegative() && !ttl.isZero(), "TTL must be greater than equal to zero");
+			Assert.isTrue(!ttl.isNegative(), "TTL must be greater than equal to zero");
 
 			this.ttl = ttl;
 

spring-data-cassandra/src/test/java/org/springframework/data/cassandra/core/cql/WriteOptionsUnitTests.java

@@ -35,6 +35,7 @@ import com.datastax.oss.driver.api.core.DefaultConsistencyLevel;
  * @author Mark Paluch
  * @author Sam Lightfoot
  * @author Thomas Strauß
+ * @author Tudor Marc
  */
 class WriteOptionsUnitTests {
 
@@ -107,16 +108,18 @@ class WriteOptionsUnitTests {
 		assertThat(writeOptions.getRoutingKey()).isEqualTo(ByteBuffer.allocate(1));
 	}
 
-	@Test // GH-1248
-	void buildWriteOptionsWithTtlDurationZero() {
-		assertThatIllegalArgumentException().isThrownBy(() -> WriteOptions.builder().ttl(0));
-		assertThatIllegalArgumentException().isThrownBy(() -> WriteOptions.builder().ttl(Duration.ZERO));
-	}
-
 	@Test // GH-1248
 	void buildWriteOptionsWithTtlNegativeDuration() {
 		assertThatIllegalArgumentException().isThrownBy(() -> WriteOptions.builder().ttl(-1));
 		assertThatIllegalArgumentException()
 				.isThrownBy(() -> WriteOptions.builder().ttl(Duration.of(-1, ChronoUnit.MICROS)));
 	}
+
+	@Test // GH-1262
+	void buildZeroDurationTtlWriterOptions() {
+
+		WriteOptions writeOptions = WriteOptions.builder().ttl(0).build();
+
+		assertThat(writeOptions.getTtl()).isEqualTo(Duration.ZERO);
+	}
 }