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KubernetesMockServerExtension.java
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KubernetesMockServerExtension.java
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/**
* Copyright (C) 2015 Red Hat, Inc.
*
* 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 io.fabric8.kubernetes.client.server.mock;
import io.fabric8.kubernetes.client.Client;
import io.fabric8.kubernetes.client.KubernetesClient;
import io.fabric8.kubernetes.client.NamespacedKubernetesClient;
import io.fabric8.kubernetes.client.utils.Serialization;
import io.fabric8.mockwebserver.Context;
import io.fabric8.mockwebserver.MockWebServer;
import io.fabric8.mockwebserver.ServerRequest;
import io.fabric8.mockwebserver.ServerResponse;
import io.fabric8.mockwebserver.http.Dispatcher;
import io.fabric8.mockwebserver.internal.MockDispatcher;
import org.junit.jupiter.api.extension.AfterAllCallback;
import org.junit.jupiter.api.extension.AfterEachCallback;
import org.junit.jupiter.api.extension.BeforeAllCallback;
import org.junit.jupiter.api.extension.BeforeEachCallback;
import org.junit.jupiter.api.extension.ExtensionContext;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.Queue;
/**
* The class that implements JUnit5 extension mechanism. You can use it directly in your JUnit test
* by annotating it with <code>@ExtendWith(KubernetesMockExtension.class)</code> or through
* <code>@EnableKubernetesMock</code> annotation
*/
public class KubernetesMockServerExtension
implements AfterEachCallback, AfterAllCallback, BeforeEachCallback, BeforeAllCallback {
private KubernetesMockServer mock;
private NamespacedKubernetesClient client;
public interface SetTestClassField {
void apply(Object instance, Field f) throws IllegalAccessException;
}
@Override
public void afterEach(ExtensionContext context) {
Optional<Class<?>> optClass = context.getTestClass();
if (optClass.isPresent()) {
Class<?> testClass = optClass.get();
if (findField(testClass, true) == null) {
destroy();
}
}
}
@Override
public void afterAll(ExtensionContext context) {
destroy();
}
@Override
public void beforeEach(ExtensionContext context) throws Exception {
setKubernetesClientAndMockServerFields(context, false);
}
@Override
public void beforeAll(ExtensionContext context) throws Exception {
setKubernetesClientAndMockServerFields(context, true);
}
protected void setFieldIfKubernetesClientOrMockServer(ExtensionContext context, boolean isStatic, Field field)
throws IllegalAccessException {
if (extensionMatches(field.getType())) {
setFieldIfEqualsToProvidedType(context, isStatic, field, Client.class,
(i, f) -> f.set(i, client.adapt((Class<Client>) f.getType())));
} else {
setFieldIfEqualsToProvidedType(context, isStatic, field, getKubernetesMockServerType(), (i, f) -> f.set(i, mock));
}
}
protected void setFieldIfEqualsToProvidedType(ExtensionContext context, boolean isStatic, Field field, Class<?> fieldType,
SetTestClassField setTestClassField) throws IllegalAccessException {
if (fieldType.isAssignableFrom(field.getType()) && Modifier.isStatic(field.getModifiers()) == isStatic) {
setKubernetesClientStaticOrMemberField(context, isStatic, field, setTestClassField);
}
}
protected void initializeKubernetesClientAndMockServer(Class<?> testClass) {
EnableKubernetesMockClient a = testClass.getAnnotation(EnableKubernetesMockClient.class);
final Map<ServerRequest, Queue<ServerResponse>> responses = new HashMap<>();
final Dispatcher dispatcher;
if (a.crud()) {
dispatcher = new KubernetesMixedDispatcher(responses);
} else {
dispatcher = new MockDispatcher(responses);
}
mock = new KubernetesMockServer(new Context(Serialization.jsonMapper()), new MockWebServer(), responses, dispatcher,
a.https());
mock.init();
try {
client = mock.createClient(a.kubernetesClientBuilderCustomizer().getConstructor().newInstance());
} catch (Exception e) {
throw new IllegalArgumentException("The provided kubernetesClientBuilder is invalid", e);
}
}
protected void destroy() {
mock.destroy();
client.close();
}
/**
* @deprecated no longer used
*/
@Deprecated
protected Class<?> getClientType() {
return KubernetesClient.class;
}
protected Class<?> getKubernetesMockServerType() {
return KubernetesMockServer.class;
}
private Field findField(Class<?> testClass, boolean isStatic) {
Field[] fields = testClass.getDeclaredFields();
for (Field f : fields) {
if (Modifier.isStatic(f.getModifiers()) == isStatic &&
(extensionMatches(f.getType()) || f.getType().equals(getKubernetesMockServerType()))) {
return f;
}
}
return null;
}
private boolean extensionMatches(Class<?> type) {
return Client.class.isAssignableFrom(type);
}
private void setKubernetesClientAndMockServerFields(ExtensionContext context, boolean isStatic)
throws IllegalAccessException {
Optional<Class<?>> optClass = context.getTestClass();
if (optClass.isPresent()) {
Class<?> testClass = optClass.get();
initializeKubernetesClientAndMockServer(testClass);
processTestClassDeclaredFields(context, isStatic, testClass);
}
}
private void processTestClassDeclaredFields(ExtensionContext context, boolean isStatic, Class<?> testClass)
throws IllegalAccessException {
Field[] fields = testClass.getDeclaredFields();
for (Field field : fields) {
setFieldIfKubernetesClientOrMockServer(context, isStatic, field);
}
}
private void setKubernetesClientStaticOrMemberField(ExtensionContext context, boolean isStatic, Field f,
SetTestClassField setTestClassField) throws IllegalAccessException {
f.setAccessible(true);
if (isStatic) {
setTestClassField.apply(null, f);
} else {
Optional<Object> optTestInstance = context.getTestInstance();
if (optTestInstance.isPresent())
setTestClassField.apply(optTestInstance.get(), f);
}
}
}