com.talis.platform.testsupport.VerifyableHandler.java Source code

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Here is the source code for com.talis.platform.testsupport.VerifyableHandler.java

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/*
 *    Copyright 2012 Talis Systems Ltd
 * 
 *    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.talis.platform.testsupport;

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

import java.io.BufferedReader;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.atomic.AtomicBoolean;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;
import org.mortbay.jetty.handler.AbstractHandler;

@SuppressWarnings("PMD.AvoidStringBufferField")
public abstract class VerifyableHandler extends AbstractHandler {

    final StringBuffer assertionLog = new StringBuffer();
    final AtomicBoolean isOk = new AtomicBoolean(true);

    public abstract void verify(boolean strictMode);

    @Override
    public void handle(final String target, final HttpServletRequest req, final HttpServletResponse resp,
            final int dispatch) throws IOException, ServletException {
        try {
            StubCallDefn defn = getExpectedCallDefn(target, req);
            if (defn == null) {
                assertionLog.append(String.format("Unexpected call: %s %s\n", req.getMethod(), target));
                fail("fail test, no more handlers");
            }

            assertEquals(defn.getExpectedPath(), target);
            assertEquals(defn.getExpectedMethod(), req.getMethod());

            BufferedReader reader = req.getReader();

            String entity = IOUtils.toString(reader);
            assertEquals(defn.getExpectedEntity(), entity);

            for (String key : defn.getHeaders().keySet()) {
                String expected = defn.getHeaders().get(key);
                String value = req.getHeader(key);
                assertEquals("Headers don't match for header " + key, expected, value);
            }

            resp.setStatus(defn.getExpectedReturnStatus());
            resp.setHeader("Content-Type", defn.getExpectedReturnType());
            Map<String, String> returnHeaders = defn.getReturnHeaders();
            if (null != returnHeaders) {
                for (Entry<String, String> header : returnHeaders.entrySet()) {
                    resp.setHeader(header.getKey(), header.getValue());
                }
            }

            byte[] expectedReturnEntity = defn.getExpectedReturnEntity();
            if (expectedReturnEntity != null) {
                resp.getOutputStream().write(expectedReturnEntity);
            }
            resp.flushBuffer();
        } catch (RuntimeException t) {
            isOk.set(false);
            assertionLog.append(t.getStackTrace());
            assertionLog.append('\n');
            throw t;
        } catch (Error t) {
            isOk.set(false);
            assertionLog.append(t.getMessage());
            assertionLog.append('\n');
            throw t;
        }
    }

    protected abstract StubCallDefn getExpectedCallDefn(final String target, final HttpServletRequest req);
}