How to write expect statement for new keyword using EasyMock? - new-operator

Question

I want to write expect statement for line filter = new Simple(A.ATTRIBUTE_ACTIVE, Operator.EQUALS, Boolean.TRUE); using EasyMock only.
//SingleLimit.java
private Limitation filter;
protected final Limitation getBaseLimitation() {
Validate.notNull(type);
GroupClass Group = new GroupClass(GroupTypeClass.SELECTOR);
if (Activatable.class.isAssignableFrom(typeListed)) {
if (A.class.isAssignableFrom(type)) {
//expect statement for below line
filter = new Simple(A.ATTRIBUTE_ACTIVE, Operator.EQUALS, Boolean.TRUE);
}
}
}
//Simple.java
public class Simple implements Serializable, Limitation
{
public Simple(String path, Operator operator, Object value) {
this(path, operator, new Object[]{value});
}
}
Any help would be appreciated

Answer 1

I'd create a new class that creates Simple objects.
public class SimpleFactory {
public Simple createSimple(....) {
return new Simple(....);
}
}
Than incject this factory into your class or pass it as parameter
public YourClazz(SimpleFactory simpleFactory) {
//constructor
this.simpleFactory = simpleFactory;
protected final Limitation getBaseLimitation() {
///...
//filter = new Simple(A.ATTRIBUTE_ACTIVE, Operator.EQUALS, Boolean.TRUE);
//change this to
filter = simpleFactory.createSimple(A.ATTRIBUTE_ACTIVE, Operator.EQUALS, Boolean.TRUE);
}
//or pass as parameter
protected final Limitation getBaseLimitation(SimpleFactory simpleFacotry) {
///...
//filter = new Simple(A.ATTRIBUTE_ACTIVE, Operator.EQUALS, Boolean.TRUE);
//change this to
filter = simpleFactory.createSimple(A.ATTRIBUTE_ACTIVE, Operator.EQUALS, Boolean.TRUE);
}
}
Now in your test code create a mock of simpleFactory.
//edited 2019/11/16 another solution
If you can not create other class, create new method in your class, then use it for creating new Simple object:
public YourClazz {
protected Simple createSimple(....) {
return new Simple(....);
}
protected final Limitation getBaseLimitation() {
//...
//filter = new Simple(A.ATTRIBUTE_ACTIVE, Operator.EQUALS, Boolean.TRUE);
//change this to
filter = createSimple(A.ATTRIBUTE_ACTIVE, Operator.EQUALS, Boolean.TRUE);
//...
}
}
Now for testing you can create a partial mock of your class and mock createSimple method:
YourClazz mock = partialMockBuilder(YourClazz.class)
.addMockedMethod("createSimple").createMock();
Simple expectedSimple = new Simple(....);
expect(mock.createSimple(.....).andReturn(expectedSimple);
replay(mock);