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DefaultInstantiatorTest.java
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DefaultInstantiatorTest.java
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/*
* Copyright 2000-2024 Vaadin Ltd.
*
* 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 com.vaadin.flow.di;
import java.util.ArrayList;
import java.util.List;
import net.bytebuddy.ByteBuddy;
import net.bytebuddy.description.modifier.SyntheticState;
import net.bytebuddy.description.modifier.Visibility;
import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
import org.junit.Assert;
import org.junit.Test;
import org.mockito.Mockito;
import com.vaadin.flow.component.Component;
import com.vaadin.flow.component.Tag;
import com.vaadin.flow.server.VaadinContext;
import com.vaadin.flow.server.VaadinService;
public class DefaultInstantiatorTest {
@Tag(Tag.A)
public static class TestComponent extends Component {
}
@Test
public void createComponent_dontDependOnGetOrCreate() {
DefaultInstantiator instantiator = Mockito
.mock(DefaultInstantiator.class);
Mockito.when(instantiator.createComponent(Mockito.any()))
.thenCallRealMethod();
TestComponent component = instantiator
.createComponent(TestComponent.class);
Assert.assertNotNull(component);
Mockito.verify(instantiator, Mockito.times(0))
.getOrCreate(Mockito.any());
}
@Test
public void getOrCreate_lookupHasObject_returnObjectFromLookup() {
VaadinService service = Mockito.mock(VaadinService.class);
Lookup lookup = mockLookup(service);
DefaultInstantiator instantiator = new DefaultInstantiator(service);
Mockito.when(lookup.lookup(List.class)).thenReturn(new ArrayList<>());
List<?> list = instantiator.getOrCreate(List.class);
Assert.assertTrue(list instanceof ArrayList);
}
@Test
public void getOrCreate_lookupHasNoObject_createNewObject() {
VaadinService service = Mockito.mock(VaadinService.class);
mockLookup(service);
DefaultInstantiator instantiator = new DefaultInstantiator(service);
TestComponent component = instantiator.getOrCreate(TestComponent.class);
Assert.assertNotNull(component);
}
@Test
public void getApplicationClass_regularClass_getsSameClass() {
VaadinService service = Mockito.mock(VaadinService.class);
mockLookup(service);
DefaultInstantiator instantiator = new DefaultInstantiator(service);
TestComponent instance = instantiator.getOrCreate(TestComponent.class);
Assert.assertSame(TestComponent.class,
instantiator.getApplicationClass(instance));
Assert.assertSame(TestComponent.class,
instantiator.getApplicationClass(instance.getClass()));
}
@Test
public void getApplicationClass_syntheticClass_getsApplicationClass()
throws Exception {
VaadinService service = Mockito.mock(VaadinService.class);
mockLookup(service);
DefaultInstantiator instantiator = new DefaultInstantiator(service);
Class<? extends TestComponent> syntheticClass = new ByteBuddy()
.subclass(TestComponent.class)
.modifiers(Visibility.PUBLIC, SyntheticState.SYNTHETIC).make()
.load(getClass().getClassLoader(),
ClassLoadingStrategy.Default.WRAPPER)
.getLoaded();
TestComponent instance = syntheticClass.getDeclaredConstructor()
.newInstance();
Assert.assertNotSame(TestComponent.class, instance.getClass());
Assert.assertSame(TestComponent.class,
instantiator.getApplicationClass(instance));
Assert.assertSame(TestComponent.class,
instantiator.getApplicationClass(instance.getClass()));
}
private Lookup mockLookup(VaadinService service) {
VaadinContext context = Mockito.mock(VaadinContext.class);
Mockito.when(service.getContext()).thenReturn(context);
Lookup lookup = Mockito.mock(Lookup.class);
Mockito.when(context.getAttribute(Lookup.class)).thenReturn(lookup);
return lookup;
}
}