/*
* 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.CoreMatchers.*;
import static org.junit.Assert.*;
import org.bson.Document;
import org.junit.Test;
/**
* Unit tests for {@link CountOperation}.
*
* @author Mark Paluch
*/
public class CountOperationUnitTests {
@Test(expected = IllegalArgumentException.class) // DATAMONGO-1549
public void rejectsEmptyFieldName() {
new CountOperation("");
}
@Test // DATAMONGO-1549
public void shouldRenderCorrectly() {
CountOperation countOperation = new CountOperation("field");
assertThat(countOperation.toDocument(Aggregation.DEFAULT_CONTEXT), is(Document.parse("{$count : \"field\" }")));
}
@Test // DATAMONGO-1549
public void countExposesFields() {
CountOperation countOperation = new CountOperation("field");
assertThat(countOperation.getFields().exposesNoFields(), is(false));
assertThat(countOperation.getFields().exposesSingleFieldOnly(), is(true));
assertThat(countOperation.getFields().getField("field"), notNullValue());
}
}