ResponseBuilderMethodArgumentResolverTest.java

package net.eusashead.hateoas.response.argumentresolver;

/*
 * #[license]
 * spring-responseentitybuilder
 * %%
 * Copyright (C) 2013 Eusa's Head
 * %%
 * 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.
 * %[license]
 */

import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.mock;

import javax.servlet.http.HttpServletRequest;

import net.eusashead.hateoas.response.DeleteResponseBuilder;
import net.eusashead.hateoas.response.EntityResponseBuilder;
import net.eusashead.hateoas.response.OptionsResponseBuilder;
import net.eusashead.hateoas.response.PostResponseBuilder;
import net.eusashead.hateoas.response.PutResponseBuilder;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.springframework.core.MethodParameter;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.ModelAndViewContainer;

@RunWith(JUnit4.class)
public class ResponseBuilderMethodArgumentResolverTest {
	
	private ResponseBuilderMethodArgumentResolver resolver;
	
	@Before
	public void before() {
		resolver = new ResponseBuilderMethodArgumentResolver();
	}

	@Test
	public void testSupportsGetResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(EntityResponseBuilder.class);
		Assert.assertTrue(resolver.supportsParameter(parameter));
	}
	
	@Test
	public void testSupportsOptionsResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(OptionsResponseBuilder.class);
		Assert.assertTrue(resolver.supportsParameter(parameter));
	}
	
	@Test
	public void testSupportsPostResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(PostResponseBuilder.class);
		Assert.assertTrue(resolver.supportsParameter(parameter));
	}
	
	@Test
	public void testSupportsPutResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(PutResponseBuilder.class);
		Assert.assertTrue(resolver.supportsParameter(parameter));
	}
	
	@Test
	public void testSupportsDeleteResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(DeleteResponseBuilder.class);
		Assert.assertTrue(resolver.supportsParameter(parameter));
	}
	
	@Test
	public void testResolveGetResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(EntityResponseBuilder.class);
		ModelAndViewContainer container = mock(ModelAndViewContainer.class);
		NativeWebRequest request = mockRequest("GET");
		WebDataBinderFactory factory = mock(WebDataBinderFactory.class);
		Object obj = resolver.resolveArgument(parameter, container, request, factory);
		Assert.assertNotNull(obj);
		Assert.assertTrue(EntityResponseBuilder.class.isAssignableFrom(obj.getClass()));
	}
	
	@Test
	public void testResolveOptionsResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(OptionsResponseBuilder.class);
		ModelAndViewContainer container = mock(ModelAndViewContainer.class);
		NativeWebRequest request = mockRequest("OPTIONS");
		WebDataBinderFactory factory = mock(WebDataBinderFactory.class);
		Object obj = resolver.resolveArgument(parameter, container, request, factory);
		Assert.assertNotNull(obj);
		Assert.assertTrue(OptionsResponseBuilder.class.isAssignableFrom(obj.getClass()));
	}
	
	@Test
	public void testResolvePostResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(PostResponseBuilder.class);
		ModelAndViewContainer container = mock(ModelAndViewContainer.class);
		NativeWebRequest request = mockRequest("POST");
		WebDataBinderFactory factory = mock(WebDataBinderFactory.class);
		Object obj = resolver.resolveArgument(parameter, container, request, factory);
		Assert.assertNotNull(obj);
		Assert.assertTrue(PostResponseBuilder.class.isAssignableFrom(obj.getClass()));
	}
	
	@Test
	public void testResolvePutResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(PutResponseBuilder.class);
		ModelAndViewContainer container = mock(ModelAndViewContainer.class);
		NativeWebRequest request = mockRequest("PUT");
		WebDataBinderFactory factory = mock(WebDataBinderFactory.class);
		Object obj = resolver.resolveArgument(parameter, container, request, factory);
		Assert.assertNotNull(obj);
		Assert.assertTrue(PutResponseBuilder.class.isAssignableFrom(obj.getClass()));
	}
	
	@Test
	public void testResolveDeleteResponseBuilder() throws Exception {
		MethodParameter parameter = mockMethodParameter(DeleteResponseBuilder.class);
		ModelAndViewContainer container = mock(ModelAndViewContainer.class);
		NativeWebRequest request = mockRequest("DELETE");
		WebDataBinderFactory factory = mock(WebDataBinderFactory.class);
		Object obj = resolver.resolveArgument(parameter, container, request, factory);
		Assert.assertNotNull(obj);
		Assert.assertTrue(DeleteResponseBuilder.class.isAssignableFrom(obj.getClass()));
	}
	
	private NativeWebRequest mockRequest(String verb) {
		MockHttpServletRequest nativeRequest = new MockHttpServletRequest(verb, "http://www.domain.com/path/to/content");
		NativeWebRequest request = mock(NativeWebRequest.class);
		doReturn(nativeRequest).when(request).getNativeRequest(HttpServletRequest.class);
		return request;
	}
	
	private MethodParameter mockMethodParameter(Class<?> clazz) {
		MethodParameter parameter = mock(MethodParameter.class);
		doReturn(clazz).when(parameter).getParameterType();
		return parameter;
	}

}