/*
* Copyright 2016-2017 the original author or authors.
*
* Licensed 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.springframework.data.mongodb.core.aggregation;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import static org.springframework.data.mongodb.test.util.IsBsonObject.*;
import org.bson.Document;
import org.junit.Test;
import org.springframework.data.mongodb.core.DocumentTestUtils;
/**
* Unit tests for {@link UnwindOperation}.
*
* @author Mark Paluch
* @author Christoph Strobl
*/
public class UnwindOperationUnitTests {
@Test // DATAMONGO-1391
public void unwindWithPathOnlyShouldUsePreMongo32Syntax() {
UnwindOperation unwindOperation = Aggregation.unwind("a");
Document pipeline = unwindOperation.toDocument(Aggregation.DEFAULT_CONTEXT);
assertThat(pipeline, isBsonObject().containing("$unwind", "$a"));
}
@Test // DATAMONGO-1391
public void unwindWithArrayIndexShouldUseMongo32Syntax() {
UnwindOperation unwindOperation = Aggregation.unwind("a", "index");
Document unwindClause = extractDocumentFromUnwindOperation(unwindOperation);
assertThat(unwindClause,
isBsonObject().containing("path", "$a").//
containing("preserveNullAndEmptyArrays", false).//
containing("includeArrayIndex", "index"));
}
@Test // DATAMONGO-1391
public void unwindWithArrayIndexShouldExposeArrayIndex() {
UnwindOperation unwindOperation = Aggregation.unwind("a", "index");
assertThat(unwindOperation.getFields().getField("index"), is(not(nullValue())));
}
@Test // DATAMONGO-1391
public void plainUnwindShouldNotExposeIndex() {
UnwindOperation unwindOperation = Aggregation.unwind("a");
assertThat(unwindOperation.getFields().exposesNoFields(), is(true));
}
@Test // DATAMONGO-1391
public void unwindWithPreserveNullShouldUseMongo32Syntax() {
UnwindOperation unwindOperation = Aggregation.unwind("a", true);
Document unwindClause = extractDocumentFromUnwindOperation(unwindOperation);
assertThat(unwindClause,
isBsonObject().containing("path", "$a").//
containing("preserveNullAndEmptyArrays", true).//
notContaining("includeArrayIndex"));
}
@Test // DATAMONGO-1391
public void lookupBuilderBuildsCorrectClause() {
UnwindOperation unwindOperation = UnwindOperation.newUnwind().path("$foo").noArrayIndex().skipNullAndEmptyArrays();
Document pipeline = unwindOperation.toDocument(Aggregation.DEFAULT_CONTEXT);
assertThat(pipeline, isBsonObject().containing("$unwind", "$foo"));
}
@Test // DATAMONGO-1391
public void lookupBuilderBuildsCorrectClauseForMongo32() {
UnwindOperation unwindOperation = UnwindOperation.newUnwind().path("$foo").arrayIndex("myindex")
.preserveNullAndEmptyArrays();
Document unwindClause = extractDocumentFromUnwindOperation(unwindOperation);
assertThat(unwindClause,
isBsonObject().containing("path", "$foo").//
containing("preserveNullAndEmptyArrays", true).//
containing("includeArrayIndex", "myindex"));
}
private Document extractDocumentFromUnwindOperation(UnwindOperation unwindOperation) {
Document document = unwindOperation.toDocument(Aggregation.DEFAULT_CONTEXT);
Document unwindClause = DocumentTestUtils.getAsDocument(document, "$unwind");
return unwindClause;
}
}