DATAMONGO-1712 - Polishing.

Follow ReactiveCrudRepository contract, fix spelling, update issue references and add deleteById(Publisher).

Related ticket: DATACMNS-1063.

Original Pull Request: #467

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleReactiveMongoRepository.java

@@ -180,6 +180,9 @@ public class SimpleReactiveMongoRepository<T, ID extends Serializable> implement
 	 */
 	@Override
 	public Flux<T> findAll(Sort sort) {
+
+		Assert.notNull(sort, "Sort must not be null!");
+
 		return findAll(new Query().with(sort));
 	}
 
@@ -204,6 +207,9 @@ public class SimpleReactiveMongoRepository<T, ID extends Serializable> implement
 	 */
 	@Override
 	public <S extends T> Flux<S> findAll(Example<S> example) {
+
+		Assert.notNull(example, "Example must not be null!");
+
 		return findAll(example, Sort.unsorted());
 	}
 
@@ -327,6 +333,19 @@ public class SimpleReactiveMongoRepository<T, ID extends Serializable> implement
 				.remove(getIdQuery(id), entityInformation.getJavaType(), entityInformation.getCollectionName()).then();
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.repository.reactive.ReactiveCrudRepository#deleteById(org.reactivestreams.Publisher)
+	 */
+	@Override
+	public Mono<Void> deleteById(Publisher<ID> publisher) {
+
+		Assert.notNull(publisher, "Id must not be null!");
+
+		return Mono.from(publisher).flatMap(id -> mongoOperations.remove(getIdQuery(id), entityInformation.getJavaType(),
+				entityInformation.getCollectionName())).then();
+	}
+
 	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.repository.reactive.ReactiveCrudRepository#delete(java.lang.Object)

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/SimpleReactiveMongoRepositoryTests.java

@@ -120,7 +120,7 @@ public class SimpleReactiveMongoRepositoryTests implements BeanClassLoaderAware,
 	}
 
 	@Test // DATAMONGO-1712
-	public void existsByFlusOfIdShouldReturnTrueForExistingObject() {
+	public void existsByFluxOfIdShouldReturnTrueForExistingObject() {
 		StepVerifier.create(repository.existsById(Flux.just(dave.id, oliver.id))).expectNext(true).verifyComplete();
 	}
 
@@ -144,7 +144,7 @@ public class SimpleReactiveMongoRepositoryTests implements BeanClassLoaderAware,
 		StepVerifier.create(repository.findById(Mono.just(dave.id))).expectNext(dave).verifyComplete();
 	}
 
-	@Test // DATAMONGO-1444
+	@Test // DATAMONGO-1712
 	public void findByIdByFluxOfIdShouldReturnTrueForExistingObject() {
 		StepVerifier.create(repository.findById(Flux.just(dave.id, oliver.id))).expectNext(dave).verifyComplete();
 	}
@@ -338,6 +338,23 @@ public class SimpleReactiveMongoRepositoryTests implements BeanClassLoaderAware,
 		StepVerifier.create(repository.findById(dave.id)).verifyComplete();
 	}
 
+	@Test // DATAMONGO-1712
+	public void deleteByIdUsingMonoShouldRemoveEntity() {
+
+		StepVerifier.create(repository.deleteById(Mono.just(dave.id))).verifyComplete();
+
+		StepVerifier.create(repository.existsById(dave.id)).expectNext(false).verifyComplete();
+	}
+
+	@Test // DATAMONGO-1712
+	public void deleteByIdUsingFluxShouldRemoveEntity() {
+
+		StepVerifier.create(repository.deleteById(Flux.just(dave.id, oliver.id))).verifyComplete();
+
+		StepVerifier.create(repository.existsById(dave.id)).expectNext(false).verifyComplete();
+		StepVerifier.create(repository.existsById(oliver.id)).expectNext(true).verifyComplete();
+	}
+
 	@Test // DATAMONGO-1444
 	public void deleteShouldRemoveEntity() {