#341 - Polishing.

Consider modifying indicators in query execution. Consider absence of Criteria for delete and update queries. Add test.

Reformat code, update documentation.

Original pull request: #345.

src/test/java/org/springframework/data/r2dbc/repository/AbstractR2dbcRepositoryIntegrationTests.java

@@ -229,6 +229,20 @@ public abstract class AbstractR2dbcRepositoryIntegrationTests extends R2dbcInteg
 				.verifyComplete();
 	}
 
+	@Test // gh-341
+	public void shouldDeleteAll() {
+
+		shouldInsertNewItems();
+
+		repository.deleteAllBy() //
+				.as(StepVerifier::create) //
+				.verifyComplete();
+
+		repository.findAll() //
+				.as(StepVerifier::create) //
+				.verifyComplete();
+	}
+
 	@Test
 	public void shouldInsertItemsTransactional() {
 
@@ -272,6 +286,8 @@ public abstract class AbstractR2dbcRepositoryIntegrationTests extends R2dbcInteg
 
 		Flux<Integer> findAllIds();
 
+		Mono<Void> deleteAllBy();
+
 		@Query("DELETE from legoset where manual = :manual")
 		Mono<Void> deleteAllByManual(int manual);
 	}

src/test/java/org/springframework/data/r2dbc/repository/query/PartTreeR2dbcQueryUnitTests.java

@@ -55,6 +55,7 @@ import org.springframework.data.repository.core.support.DefaultRepositoryMetadat
  *
  * @author Roman Chigvintsev
  * @author Mark Paluch
+ * @author Mingyuan Wu
  */
 @RunWith(MockitoJUnitRunner.class)
 public class PartTreeR2dbcQueryUnitTests {
@@ -594,13 +595,14 @@ public class PartTreeR2dbcQueryUnitTests {
 
 	@Test // gh-341
 	public void createsQueryToDeleteByFirstName() throws Exception {
+
 		R2dbcQueryMethod queryMethod = getQueryMethod("deleteByFirstName", String.class);
 		PartTreeR2dbcQuery r2dbcQuery = new PartTreeR2dbcQuery(queryMethod, databaseClient, r2dbcConverter,
 				dataAccessStrategy);
 		RelationalParametersParameterAccessor accessor = getAccessor(queryMethod, new Object[] { "John" });
 		BindableQuery bindableQuery = r2dbcQuery.createQuery(accessor);
-		String expectedSql = "DELETE FROM "+ TABLE + " WHERE " + TABLE + ".first_name = $1" ;
-		assertThat(bindableQuery.get()).isEqualTo(expectedSql);
+
+		assertThat(bindableQuery.get()).isEqualTo("DELETE FROM " + TABLE + " WHERE " + TABLE + ".first_name = $1");
 	}
 
 	private R2dbcQueryMethod getQueryMethod(String methodName, Class<?>... parameterTypes) throws Exception {