package org.geoserver.filters;
import static org.junit.Assert.*;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.junit.Test;
import com.mockrunner.mock.web.MockFilterChain;
import com.mockrunner.mock.web.MockFilterConfig;
import com.mockrunner.mock.web.MockHttpServletRequest;
import com.mockrunner.mock.web.MockHttpServletResponse;
public class FlushSafeFilterTest {
@Test
public void testRetrieveSameOutputStream() throws Exception {
MockHttpServletRequest request = new MockHttpServletRequest();
MockHttpServletResponse response = new MockHttpServletResponse();
MockFilterChain chain = new MockFilterChain() {
@Override
public void doFilter(ServletRequest request, ServletResponse response) throws IOException,
ServletException {
// make sure repeated calls to get output stream give us back the same output stream,
// e.g., that we're not creating a new wrapper each time
ServletOutputStream os1 = response.getOutputStream();
ServletOutputStream os2 = response.getOutputStream();
assertSame(os1, os2);
assertTrue(os1 instanceof FlushSafeResponse.FlushSafeServletOutputStream);
}
};
// run the filter
FlushSafeFilter filter = new FlushSafeFilter();
filter.init(new MockFilterConfig());
filter.doFilter(request, response, chain);
}
@Test
public void testFlushAfterClose() throws ServletException, IOException {
// prepare request, response, and chain
MockHttpServletRequest request = new MockHttpServletRequest();
MockHttpServletResponse response = new MockHttpServletResponse() {
ServletOutputStream os;
@Override
public ServletOutputStream getOutputStream() throws IOException {
if (os == null) {
final ServletOutputStream wrapped = super.getOutputStream();
os = new ServletOutputStream() {
boolean closed;
@Override
public void write(int b) throws IOException {
wrapped.write(b);
}
@Override
public void close() throws IOException {
closed = true;
wrapped.close();
}
@Override
public void flush() throws IOException {
if (closed) {
// we should never reach this code
throw new RuntimeException(
"Aaarg, I'm already closed, your JVM shall die now!");
}
wrapped.flush();
}
};
}
return os;
}
};
MockFilterChain chain = new MockFilterChain() {
@Override
public void doFilter(ServletRequest request, ServletResponse response) throws IOException,
ServletException {
ServletOutputStream os = response.getOutputStream();
os.print("Some random text");
os.close();
// ka-blam! (or not?)
os.flush();
}
};
// run the filter
FlushSafeFilter filter = new FlushSafeFilter();
filter.init(new MockFilterConfig());
filter.doFilter(request, response, chain);
// if we got here without exception, it's already a good sign. Let's check the output
assertEquals("Some random text", response.getOutputStreamContent());
}
}