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AccumulatorOperatorsUnitTests.java
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AccumulatorOperatorsUnitTests.java
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/*
* Copyright 2021-2022 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
*
* https://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.assertj.core.api.Assertions.*;
import static org.springframework.data.mongodb.core.aggregation.AccumulatorOperators.*;
import java.util.Arrays;
import java.util.Date;
import org.bson.Document;
import org.junit.jupiter.api.Test;
import org.springframework.data.mongodb.core.aggregation.DateOperators.Year;
import org.springframework.data.mongodb.core.mapping.Field;
import org.springframework.data.mongodb.util.aggregation.TestAggregationContext;
/**
* Unit tests for {@link AccumulatorOperators}.
*
* @author Christoph Strobl
*/
class AccumulatorOperatorsUnitTests {
@Test // GH-3712
void rendersCovariancePopWithFieldReference() {
assertThat(AccumulatorOperators.valueOf("balance").covariancePop("midichlorianCount")
.toDocument(TestAggregationContext.contextFor(Jedi.class)))
.isEqualTo(new Document("$covariancePop", Arrays.asList("$balance", "$force")));
}
@Test // GH-3712
void rendersCovariancePopWithExpression() {
assertThat(AccumulatorOperators.valueOf(Year.yearOf("birthdate")).covariancePop("midichlorianCount")
.toDocument(TestAggregationContext.contextFor(Jedi.class)))
.isEqualTo(new Document("$covariancePop", Arrays.asList(new Document("$year", "$birthdate"), "$force")));
}
@Test // GH-3712
void rendersCovarianceSampWithFieldReference() {
assertThat(AccumulatorOperators.valueOf("balance").covarianceSamp("midichlorianCount")
.toDocument(TestAggregationContext.contextFor(Jedi.class)))
.isEqualTo(new Document("$covarianceSamp", Arrays.asList("$balance", "$force")));
}
@Test // GH-3712
void rendersCovarianceSampWithExpression() {
assertThat(AccumulatorOperators.valueOf(Year.yearOf("birthdate")).covarianceSamp("midichlorianCount")
.toDocument(TestAggregationContext.contextFor(Jedi.class)))
.isEqualTo(new Document("$covarianceSamp", Arrays.asList(new Document("$year", "$birthdate"), "$force")));
}
@Test // GH-3718
void rendersExpMovingAvgWithNumberOfHistoricDocuments() {
assertThat(valueOf("price").expMovingAvg().historicalDocuments(2).toDocument(Aggregation.DEFAULT_CONTEXT))
.isEqualTo(Document.parse("{ $expMovingAvg: { input: \"$price\", N: 2 } }"));
}
@Test // GH-3718
void rendersExpMovingAvgWithAlpha() {
assertThat(valueOf("price").expMovingAvg().alpha(0.75).toDocument(Aggregation.DEFAULT_CONTEXT))
.isEqualTo(Document.parse("{ $expMovingAvg: { input: \"$price\", alpha: 0.75 } }"));
}
@Test // GH-4139
void rendersMax() {
assertThat(valueOf("price").max().toDocument(Aggregation.DEFAULT_CONTEXT))
.isEqualTo(Document.parse("{ $max: \"$price\" }"));
}
@Test // GH-4139
void rendersMaxN() {
assertThat(valueOf("price").max(3).toDocument(Aggregation.DEFAULT_CONTEXT))
.isEqualTo(Document.parse("{ $maxN: { n: 3, input : \"$price\" } }"));
}
static class Jedi {
String name;
Date birthdate;
@Field("force") Integer midichlorianCount;
Integer balance;
}
}