HeaderParameterResolverTest.java

/*******************************************************************************
 * Copyright (c) 2012-2016 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.everrest.core.impl.method;

import org.everrest.core.ApplicationContext;
import org.everrest.core.Parameter;
import org.everrest.core.method.TypeProducer;
import org.junit.Before;
import org.junit.Test;

import javax.ws.rs.HeaderParam;
import javax.ws.rs.core.MultivaluedHashMap;
import javax.ws.rs.core.MultivaluedMap;

import static org.junit.Assert.assertEquals;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.RETURNS_DEEP_STUBS;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

@SuppressWarnings("unchecked")
public class HeaderParameterResolverTest {
    private MultivaluedMap<String, String> headers;
    private ApplicationContext             applicationContext;
    private Parameter                      parameter;
    private TypeProducer                   typeProducer;

    private HeaderParameterResolver headerParameterResolver;

    @Before
    public void setUp() throws Exception {
        headers = new MultivaluedHashMap<>();
        headers.putSingle("foo", "to be or not to be");
        headers.putSingle("bar", "hello world");

        applicationContext = mock(ApplicationContext.class, RETURNS_DEEP_STUBS);
        when(applicationContext.getHttpHeaders().getRequestHeaders()).thenReturn(headers);

        HeaderParam headerParam = mock(HeaderParam.class);
        when(headerParam.value()).thenReturn("foo");

        parameter = mock(Parameter.class);
        when(parameter.getParameterClass()).thenReturn((Class)String.class);

        typeProducer = mock(TypeProducer.class);
        TypeProducerFactory typeProducerFactory = mock(TypeProducerFactory.class);
        when(typeProducerFactory.createTypeProducer(eq(String.class), any())).thenReturn(typeProducer);

        headerParameterResolver = new HeaderParameterResolver(headerParam, typeProducerFactory);
    }

    @Test
    public void retrievesHeaderFromRequest() throws Exception {
        when(typeProducer.createValue("foo", headers, null)).thenReturn(headers.getFirst("foo"));

        Object resolvedHeader = headerParameterResolver.resolve(parameter, applicationContext);

        assertEquals(headers.getFirst("foo"), resolvedHeader);
    }

    @Test
    public void retrievesDefaultValueWhenHeaderDoesNotPresentInRequest() throws Exception {
        when(parameter.getDefaultValue()).thenReturn("default value");
        when(typeProducer.createValue("foo", headers, "default value")).thenReturn("default value");

        Object resolvedHeader = headerParameterResolver.resolve(parameter, applicationContext);

        assertEquals("default value", resolvedHeader);
    }
}