/*
* 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.core.Is.*;
import static org.junit.Assert.*;
import static org.springframework.data.mongodb.core.DocumentTestUtils.getAsDocument;
import static org.springframework.data.mongodb.core.aggregation.Aggregation.*;
import org.junit.Test;
import org.springframework.data.mongodb.core.aggregation.BucketAutoOperation.Granularities;
import org.bson.Document;
/**
* Unit tests for {@link BucketAutoOperation}.
*
* @author Mark Paluch
*/
public class BucketAutoOperationUnitTests {
@Test(expected = IllegalArgumentException.class) // DATAMONGO-1552
public void rejectsNullFields() {
new BucketAutoOperation((Field) null, 0);
}
@Test(expected = IllegalArgumentException.class) // DATAMONGO-1552
public void rejectsNonPositiveIntegerNullFields() {
new BucketAutoOperation(Fields.field("field"), 0);
}
@Test // DATAMONGO-1552
public void shouldRenderBucketOutputExpressions() {
BucketAutoOperation operation = Aggregation.bucketAuto("field", 5) //
.andOutputExpression("(netPrice + surCharge) * taxrate * [0]", 2).as("grossSalesPrice") //
.andOutput("title").push().as("titles");
Document agg = operation.toDocument(Aggregation.DEFAULT_CONTEXT);
assertThat(extractOutput(agg), is(Document.parse(
"{ \"grossSalesPrice\" : { \"$multiply\" : [ { \"$add\" : [ \"$netPrice\" , \"$surCharge\"]} , \"$taxrate\" , 2]} , \"titles\" : { $push: \"$title\" } }}")));
}
@Test(expected = IllegalStateException.class) // DATAMONGO-1552
public void shouldRenderEmptyAggregationExpression() {
bucket("groupby").andOutput("field").as("alias");
}
@Test // DATAMONGO-1552
public void shouldRenderBucketOutputOperators() {
BucketAutoOperation operation = Aggregation.bucketAuto("field", 5) //
.andOutputCount().as("titles");
Document agg = operation.toDocument(Aggregation.DEFAULT_CONTEXT);
assertThat(extractOutput(agg), is(Document.parse("{ titles : { $sum: 1 } }")));
}
@Test // DATAMONGO-1552
public void shouldRenderCorrectly() {
Document agg = bucketAuto("field", 1).withBuckets(5).toDocument(Aggregation.DEFAULT_CONTEXT);
assertThat(agg, is(Document.parse("{ $bucketAuto: { groupBy: \"$field\", buckets: 5 } }")));
}
@Test // DATAMONGO-1552
public void shouldRenderGranulariy() {
Document agg = bucketAuto("field", 1) //
.withGranularity(Granularities.E24) //
.toDocument(Aggregation.DEFAULT_CONTEXT);
assertThat(agg, is(Document.parse("{ $bucketAuto: { buckets: 1, granularity: \"E24\", groupBy: \"$field\" } }")));
}
@Test // DATAMONGO-1552
public void shouldRenderSumOperator() {
BucketAutoOperation operation = bucketAuto("field", 5) //
.andOutput("score").sum().as("cummulated_score");
Document agg = operation.toDocument(Aggregation.DEFAULT_CONTEXT);
assertThat(extractOutput(agg), is(Document.parse("{ cummulated_score : { $sum: \"$score\" } }")));
}
@Test // DATAMONGO-1552
public void shouldRenderSumWithOwnOutputExpression() {
BucketAutoOperation operation = bucketAuto("field", 5) //
.andOutputExpression("netPrice + tax").apply("$multiply", 5).as("total");
Document agg = operation.toDocument(Aggregation.DEFAULT_CONTEXT);
assertThat(extractOutput(agg),
is(Document.parse("{ total : { $multiply: [ {$add : [\"$netPrice\", \"$tax\"]}, 5] } }")));
}
private static Document extractOutput(Document fromBucketClause) {
return getAsDocument(getAsDocument(fromBucketClause, "$bucketAuto"), "output");
}
}