DefaultHttpJsonResponseTest.java

/*******************************************************************************
 * Copyright (c) 2012-2017 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.eclipse.che.api.core.rest;

import com.google.common.reflect.TypeToken;

import org.eclipse.che.api.core.rest.shared.dto.Link;
import org.eclipse.che.dto.server.DtoFactory;
import org.eclipse.che.dto.server.JsonArrayImpl;
import org.eclipse.che.dto.server.JsonStringMapImpl;
import org.testng.annotations.Test;

import java.io.IOException;
import java.util.Set;

import static java.util.Collections.singleton;
import static java.util.Collections.singletonList;
import static java.util.Collections.singletonMap;
import static org.eclipse.che.api.core.util.LinksHelper.createLink;
import static org.testng.Assert.assertEquals;

/**
 * Tests of {@link DefaultHttpJsonResponse}.
 * 
 * @author Yevhenii Voevodin
 */
public class DefaultHttpJsonResponseTest {

    @Test
    public void shouldReturnStringAsItIsIfStringIsRequested() throws Exception {
        final DefaultHttpJsonResponse response = new DefaultHttpJsonResponse("string response", 200);

        assertEquals(response.asString(), "string response");
    }

    @Test
    public void shouldReturnJsonSerializableInstanceIfItWasRequested() throws Exception {
        final Link testLink = createLink("POST", "http://localhost:8080", "rel");
        final DefaultHttpJsonResponse response = new DefaultHttpJsonResponse(DtoFactory.getInstance().toJson(testLink), 200);

        assertEquals(response.asDto(Link.class), testLink);
    }

    @Test
    public void shouldDeserializeResponseToGivenType() throws Exception {
        final String responseBody = DtoFactory.getInstance().toJson(new JsonArrayImpl<>(singletonList("element")));
        final DefaultHttpJsonResponse response = new DefaultHttpJsonResponse(responseBody, 200);
        
        assertEquals(response.as(Set.class, new TypeToken<Set<String>>() { }.getType()), singleton("element"));
    }

    @Test
    public void shouldBeAbleToRequestProperties() throws Exception {
        final String responseBody = DtoFactory.getInstance().toJson(new JsonStringMapImpl<>(singletonMap("key", "value")));
        final DefaultHttpJsonResponse response = new DefaultHttpJsonResponse(responseBody, 200);

        assertEquals(response.asProperties(), singletonMap("key", "value"));
    }

    @Test
    public void shouldBeAbleToRequestListOfJsonSerializableElements() throws Exception {
        final Link testLink = createLink("POST", "http://localhost:8080", "rel");
        final String responseBody = DtoFactory.getInstance().toJson(new JsonArrayImpl<>(singletonList(testLink)));
        final DefaultHttpJsonResponse response = new DefaultHttpJsonResponse(responseBody, 200);

        assertEquals(response.asList(Link.class), singletonList(testLink));
    }
    
    @Test(expectedExceptions = NullPointerException.class)
    public void shouldThrowNullPointerExceptionWhenClazzIsNull() throws Exception {
        new DefaultHttpJsonResponse("{}", 200).as(null, null);
    }

    @Test(expectedExceptions = NullPointerException.class)
    public void shouldThrowNullPointerExceptionWhenDtoInterfaceIsNull() throws Exception {
        new DefaultHttpJsonResponse("{}", 200).asDto(null);
    }
    
    @Test(expectedExceptions = IOException.class)
    public void shouldThrowServerExceptionWhenParsingNotValidJsonContent() throws Exception {
        new DefaultHttpJsonResponse("not valid json", 200).as(Set.class, null);
    }

    @Test
    public void shouldReturnCorrectResponseCode() {
        final DefaultHttpJsonResponse response = new DefaultHttpJsonResponse("not valid json", 201);

        assertEquals(response.getResponseCode(), 201);
    }
}