SPQRResourceManagerClientTest.java

/**
 * Copyright 2015 Otto (GmbH & Co KG)
 *
 * 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.ottogroup.bi.spqr.node.resman;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.Invocation.Builder;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;

import org.junit.Assert;
import org.junit.Test;
import org.mockito.Mockito;

import com.ottogroup.bi.spqr.exception.RequiredInputMissingException;
import com.ottogroup.bi.spqr.node.message.NodeDeRegistration.NodeDeRegistrationResponse;
import com.ottogroup.bi.spqr.node.message.NodeDeRegistration.NodeDeRegistrationState;
import com.ottogroup.bi.spqr.node.message.NodeRegistration.NodeRegistrationResponse;
import com.ottogroup.bi.spqr.node.message.NodeRegistration.NodeRegistrationState;

/**
 * Test case for {@link SPQRResourceManagerClient}
 * @author mnxfst
 * @since Apr 14, 2015
 */
public class SPQRResourceManagerClientTest {

	/**
	 * Test case for {@link SPQRResourceManagerClient#SPQRResourceManagerClient(String, String, int, com.sun.jersey.api.client.Client)} being
	 * provided an empty input to protocol parameter
	 */
	@Test	
	public void testConstructor_withEmptyProtocol() {
		try {
			new SPQRResourceManagerClient("", "localhost", 9090, Mockito.mock(Client.class));
			Assert.fail("Invalid input");
		} catch(RequiredInputMissingException e) {
			// expected
		}
	}

	/**
	 * Test case for {@link SPQRResourceManagerClient#SPQRResourceManagerClient(String, String, int, com.sun.jersey.api.client.Client)} being
	 * provided an empty input to host parameter
	 */
	@Test	
	public void testConstructor_withEmptyRemoteHost() {
		try {
			new SPQRResourceManagerClient("http", "", 9090, Mockito.mock(Client.class));
			Assert.fail("Invalid input");
		} catch(RequiredInputMissingException e) {
			// expected
		}
	}

	/**
	 * Test case for {@link SPQRResourceManagerClient#SPQRResourceManagerClient(String, String, int, com.sun.jersey.api.client.Client)} being
	 * provided an invalid input to port parameter
	 */
	@Test	
	public void testConstructor_withInvalidPort() {
		try {
			new SPQRResourceManagerClient("http", "localhost", -1, Mockito.mock(Client.class));
			Assert.fail("Invalid input");
		} catch(RequiredInputMissingException e) {
			// expected
		}
	}

	/**
	 * Test case for {@link SPQRResourceManagerClient#SPQRResourceManagerClient(String, String, int, com.sun.jersey.api.client.Client)} being
	 * provided null as client ref
	 */
	@Test	
	public void testConstructor_withNullClient() {
		try {
			new SPQRResourceManagerClient("http", "localhost", 8080, null);
			Assert.fail("Invalid input");
		} catch(RequiredInputMissingException e) {
			// expected
		}
	}

	/**
	 * Test case for {@link SPQRResourceManagerClient#SPQRResourceManagerClient(String, String, int, com.sun.jersey.api.client.Client)} being
	 * provided valid input
	 */
	@Test	
	public void testConstructor_withValidInput() throws RequiredInputMissingException {
		SPQRResourceManagerClient client = new SPQRResourceManagerClient("http", "localhost", 8080, Mockito.mock(Client.class));
		Assert.assertNotNull("The client must not be null", client);
	}
	
	/**
	 * Test case for {@link SPQRResourceManagerClient#registerNode(String, String, int, int)} being provided an 
	 * empty input to protocol parameter
	 */
	@Test
	public void testRegisterNode_withEmptyNodeProtocol() throws Exception {
		try {
			new SPQRResourceManagerClient("http", "resourceManager", 9090, Mockito.mock(Client.class)).registerNode("", "localhost", 8080, 8081);
			Assert.fail("Invalid input");
		} catch(RequiredInputMissingException e) {
			// expected
		}
	}
	
	/**
	 * Test case for {@link SPQRResourceManagerClient#registerNode(String, String, int, int)} being provided an 
	 * empty input to host parameter
	 */
	@Test
	public void testRegisterNode_withEmptyNodeHost() throws Exception {
		try {
			new SPQRResourceManagerClient("http", "localhost", 9090, Mockito.mock(Client.class)).registerNode("http", "", 8080, 8081);
			Assert.fail("Invalid input");
		} catch(RequiredInputMissingException e) {
			// expected
		}
	}
	
	/**
	 * Test case for {@link SPQRResourceManagerClient#registerNode(String, String, int, int)} being provided an 
	 * invalid input to service port parameter
	 */
	@Test
	public void testRegisterNode_withInvalidNodeServicePort() throws Exception {
		try {
			new SPQRResourceManagerClient("http", "resourceManager", 9090, Mockito.mock(Client.class)).registerNode("http", "localhost", -1, 8081);
			Assert.fail("Invalid input");
		} catch(RequiredInputMissingException e) {
			// expected
		}
	}
	
	/**
	 * Test case for {@link SPQRResourceManagerClient#registerNode(String, String, int, int)} being provided an 
	 * invalid input to admin port parameter
	 */
	@Test
	public void testRegisterNode_withInvalidNodeAdminPort() throws Exception {
		try {
			new SPQRResourceManagerClient("http", "resourceManager", 9090, Mockito.mock(Client.class)).registerNode("http", "localhost", 8080, -1);
			Assert.fail("Invalid input");
		} catch(RequiredInputMissingException e) {
			// expected
		}
	}
	
	/**
	 * Test case for {@link SPQRResourceManagerClient#registerNode(String, String, int, int)} being provided
	 * valid input that must lead to successful registration
	 */
	@Test
	public void testRegisterNode_withValidInput() throws Exception {
		String remoteUrl = "http://localhost:7070/nodes";
		NodeRegistrationResponse expectedResponse = new NodeRegistrationResponse("test-id", NodeRegistrationState.OK);

		Builder builder2 = Mockito.mock(Builder.class);
		Mockito.when(builder2.post(Mockito.isA(Entity.class), Mockito.eq(NodeRegistrationResponse.class))).thenReturn(expectedResponse);
		
		Builder builder1 = Mockito.mock(Builder.class);
		Mockito.when(builder1.accept(MediaType.APPLICATION_JSON)).thenReturn(builder2);
				
		WebTarget mockWebTarget = Mockito.mock(WebTarget.class);
		Mockito.when(mockWebTarget.request(MediaType.APPLICATION_JSON)).thenReturn(builder1);
		
		Client mockClient = Mockito.mock(Client.class);
		Mockito.when(mockClient.target(remoteUrl)).thenReturn(mockWebTarget);
		
		SPQRResourceManagerClient client = new SPQRResourceManagerClient("http", "localhost", 7070, mockClient);
		NodeRegistrationResponse response = client.registerNode("http", "localhost", 8080, 8081);
		Assert.assertNotNull("The response must not be null", response);
		Assert.assertEquals("No errors expected", NodeRegistrationState.OK, response.getState());
		
		Mockito.verify(mockClient).target(remoteUrl);
		Mockito.verify(mockWebTarget).request(MediaType.APPLICATION_JSON);
		Mockito.verify(builder1).accept(MediaType.APPLICATION_JSON);
		Mockito.verify(builder2).post(Mockito.isA(Entity.class), Mockito.eq(NodeRegistrationResponse.class));
	}
	
	/**
	 * Test case for {@link SPQRResourceManagerClient#deregisterNode(String)} being provided empty input
	 */
	@Test
	public void testDeRegisterNode_withEmptyInput() throws Exception {
		try {
			new SPQRResourceManagerClient("http", "localhost", 8080, Mockito.mock(Client.class)).deregisterNode(null);
			Assert.fail("Invalid input");
		} catch(RequiredInputMissingException e) {
			// expected
		}
	}

	
	/**
	 * Test case for {@link SPQRResourceManagerClient#deregisterNode(String)} being provided valid input
	 */
	@Test
	public void testDeRegisterNode_withValidInput() throws Exception {
	
		String remoteUrl = "http://localhost:7070/nodes/test-id";
		NodeDeRegistrationResponse expectedResponse = new NodeDeRegistrationResponse("test-id", NodeDeRegistrationState.OK, "");

		Builder builder2 = Mockito.mock(Builder.class);
		Mockito.when(builder2.delete(NodeDeRegistrationResponse.class)).thenReturn(expectedResponse);
		
		Builder builder1 = Mockito.mock(Builder.class);
		Mockito.when(builder1.accept(MediaType.APPLICATION_JSON)).thenReturn(builder2);
				
		WebTarget mockWebTarget = Mockito.mock(WebTarget.class);
		Mockito.when(mockWebTarget.request(MediaType.APPLICATION_JSON)).thenReturn(builder1);
		
		Client mockClient = Mockito.mock(Client.class);
		Mockito.when(mockClient.target(remoteUrl)).thenReturn(mockWebTarget);
		
		SPQRResourceManagerClient client = new SPQRResourceManagerClient("http", "localhost", 7070, mockClient);
		NodeDeRegistrationResponse response = client.deregisterNode("test-id");
		Assert.assertNotNull("The response must not be null", response);
		Assert.assertEquals("No errors expected", NodeDeRegistrationState.OK, response.getState());
		
		Mockito.verify(mockClient).target(remoteUrl);
		Mockito.verify(mockWebTarget).request(MediaType.APPLICATION_JSON);
		Mockito.verify(builder1).accept(MediaType.APPLICATION_JSON);
		Mockito.verify(builder2).delete(NodeDeRegistrationResponse.class);

	}

}