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test(2048): test case to show how single expression operation results in unexpected result

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Ladislav Lencucha 2021-01-01 20:52:52 +01:00 committed by Jan-Willem Gmelig Meyling
parent 78cd6ae97b
commit f112a7e4a6
1 changed files with 45 additions and 12 deletions
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57
querydsl-collections/src/test/java/com/querydsl/collections/CollQueryStandardTest.java
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@ -13,17 +13,29 @@
*/
package com.querydsl.collections;
import static org.junit.Assert.*;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import org.junit.Test;
import com.querydsl.core.*;
import com.querydsl.core.types.*;
import com.querydsl.core.Fetchable;
import com.querydsl.core.Module;
import com.querydsl.core.QueryExecution;
import com.querydsl.core.Target;
import com.querydsl.core.Tuple;
import com.querydsl.core.types.ArrayConstructorExpression;
import com.querydsl.core.types.Concatenation;
import com.querydsl.core.types.Expression;
import com.querydsl.core.types.ParamNotSetException;
import com.querydsl.core.types.Predicate;
import com.querydsl.core.types.Projections;
import com.querydsl.core.types.dsl.Expressions;
import com.querydsl.core.types.dsl.Param;
import org.junit.Test;
public class CollQueryStandardTest {
@ -38,11 +50,11 @@ public class CollQueryStandardTest {
private final QCat otherCat = new QCat("otherCat");
private final List<Cat> data = Arrays.asList(
new Cat("Bob", 1, birthDate),
new Cat("Ruth", 2, birthDate),
new Cat("Felix", 3, birthDate),
new Cat("Allen", 4, birthDate),
new Cat("Mary", 5, birthDate)
new Cat("Bob", 1, birthDate),
new Cat("Ruth", 2, birthDate),
new Cat("Felix", 3, birthDate),
new Cat("Allen", 4, birthDate),
new Cat("Mary", 5, birthDate)
);
private static final Expression<?>[] NO_EXPRESSIONS = new Expression[0];
@ -55,7 +67,7 @@ public class CollQueryStandardTest {
@Override
protected Fetchable<?> createQuery(Predicate filter) {
return CollQueryFactory.from(cat, data).from(otherCat, data)
.where(filter).select(cat.name);
.where(filter).select(cat.name);
}
};
@ -80,7 +92,7 @@ public class CollQueryStandardTest {
}
@Test
public void tupleProjection() {
public void tupleMultipleFieldsProjection() {
List<Tuple> tuples = CollQueryFactory.from(cat, data)
.select(cat.name, cat.birthdate).fetch();
for (Tuple tuple : tuples) {
@ -89,6 +101,27 @@ public class CollQueryStandardTest {
}
}
@Test
public void tupleOneFieldProjection() {
List<Tuple> tuples = CollQueryFactory.from(cat, data)
.select(new Expression<?>[] {cat.name}).fetch();
for (Tuple tuple : tuples) {
assertEquals(1, tuple.size());
assertNotNull(tuple.get(cat.name));
}
}
@Test
public void tupleOneNullFieldProjection() {
List<Tuple> tuples = CollQueryFactory.from(cat, data)
.select(new Expression<?>[] {Expressions.nullExpression()}).fetch();
for (Tuple tuple : tuples) {
assertNotNull(tuple);
assertEquals(1, tuple.size()); // THIS FAILS WITH NPE
assertNull(tuple.get(Expressions.nullExpression()));
}
}
@Test
public void nested_tupleProjection() {
Concatenation concat = new Concatenation(cat.name, cat.name);