org.springframework.cloud.dataflow.rest.client.DataflowTemplateTests.java Source code

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Here is the source code for org.springframework.cloud.dataflow.rest.client.DataflowTemplateTests.java

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/*
 * Copyright 2016 the original author or authors.
 *
 * 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 org.springframework.cloud.dataflow.rest.client;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.Iterator;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import org.springframework.batch.core.ExitStatus;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobInstance;
import org.springframework.batch.core.JobParameter;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.StepExecution;
import org.springframework.batch.item.ExecutionContext;
import org.springframework.cloud.dataflow.rest.job.StepExecutionHistory;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.client.ResourceAccessException;
import org.springframework.web.client.RestTemplate;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

/**
 * @author Gunnar Hillert
 */
public class DataflowTemplateTests {

    @Before
    public void setup() {
        System.setProperty("sun.net.client.defaultConnectTimeout", String.valueOf(100));
    }

    @After
    public void shutdown() {
        System.clearProperty("sun.net.client.defaultConnectTimeout");
    }

    @Test
    public void testDataFlowTemplateContructorWithNullUri() throws URISyntaxException {

        try {
            new DataFlowTemplate(null);
        } catch (IllegalArgumentException e) {
            assertEquals("The provided baseURI must not be null.", e.getMessage());
            return;
        }

        fail("Expected an IllegalArgumentException to be thrown.");
    }

    @Test(expected = ResourceAccessException.class)
    public void testDataFlowTemplateContructorWithNonExistingUri() throws URISyntaxException {
        new DataFlowTemplate(new URI("http://doesnotexist:1234"));
    }

    @Test
    public void testThatDefaultDataflowRestTemplateContainsMixins() {
        final RestTemplate restTemplate = DataFlowTemplate.getDefaultDataflowRestTemplate();

        assertNotNull(restTemplate);
        assertTrue(restTemplate.getErrorHandler() instanceof VndErrorResponseErrorHandler);

        assertCorrectMixins(restTemplate);

    }

    private void assertCorrectMixins(RestTemplate restTemplate) {
        boolean containsMappingJackson2HttpMessageConverter = false;

        for (HttpMessageConverter<?> converter : restTemplate.getMessageConverters()) {
            if (converter instanceof MappingJackson2HttpMessageConverter) {
                containsMappingJackson2HttpMessageConverter = true;

                final MappingJackson2HttpMessageConverter jacksonConverter = (MappingJackson2HttpMessageConverter) converter;
                final ObjectMapper objectMapper = jacksonConverter.getObjectMapper();

                assertNotNull(objectMapper.findMixInClassFor(JobExecution.class));
                assertNotNull(objectMapper.findMixInClassFor(JobParameters.class));
                assertNotNull(objectMapper.findMixInClassFor(JobParameter.class));
                assertNotNull(objectMapper.findMixInClassFor(JobInstance.class));
                assertNotNull(objectMapper.findMixInClassFor(ExitStatus.class));
                assertNotNull(objectMapper.findMixInClassFor(StepExecution.class));
                assertNotNull(objectMapper.findMixInClassFor(ExecutionContext.class));
                assertNotNull(objectMapper.findMixInClassFor(StepExecutionHistory.class));
            }
        }

        if (!containsMappingJackson2HttpMessageConverter) {
            fail("Expected that the restTemplate's list of Message Converters contained a "
                    + "MappingJackson2HttpMessageConverter");
        }
    }

    @Test
    public void testThatPrepareRestTemplateWithNullContructorValueContainsMixins() {
        final RestTemplate restTemplate = DataFlowTemplate.prepareRestTemplate(null);

        assertNotNull(restTemplate);
        assertTrue(restTemplate.getErrorHandler() instanceof VndErrorResponseErrorHandler);

        assertCorrectMixins(restTemplate);

    }

    @Test
    public void testThatPrepareRestTemplateWithProvidedRestTemplateContainsMixins() {
        final RestTemplate providedRestTemplate = new RestTemplate();
        final RestTemplate restTemplate = DataFlowTemplate.prepareRestTemplate(providedRestTemplate);

        assertNotNull(restTemplate);
        assertTrue(providedRestTemplate == restTemplate);
        assertTrue(restTemplate.getErrorHandler() instanceof VndErrorResponseErrorHandler);

        assertCorrectMixins(restTemplate);
    }

    @Test
    public void testPrepareRestTemplateWithRestTemplateThatHasNoMessageConverters() {
        final RestTemplate providedRestTemplate = new RestTemplate();
        providedRestTemplate.getMessageConverters().clear();

        try {
            DataFlowTemplate.prepareRestTemplate(providedRestTemplate);
        } catch (IllegalArgumentException e) {
            assertEquals("'messageConverters' must not be empty", e.getMessage());
            return;
        }

        fail("Expected an IllegalArgumentException to be thrown.");
    }

    @Test
    public void testPrepareRestTemplateWithRestTemplateThatMissesJacksonConverter() {
        final RestTemplate providedRestTemplate = new RestTemplate();
        final Iterator<HttpMessageConverter<?>> iterator = providedRestTemplate.getMessageConverters().iterator();

        while (iterator.hasNext()) {
            if (iterator.next() instanceof MappingJackson2HttpMessageConverter) {
                iterator.remove();
            }
        }

        try {
            DataFlowTemplate.prepareRestTemplate(providedRestTemplate);
        } catch (IllegalArgumentException e) {
            assertEquals("The RestTemplate does not contain a required MappingJackson2HttpMessageConverter.",
                    e.getMessage());
            return;
        }

        fail("Expected an IllegalArgumentException to be thrown.");
    }
}