HBASE-8552: fix coverage org.apache.hadoop.hbase.rest.filter(by Andrey Klochkov)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1537197 13f79535-47bb-0310-9956-ffa450edef68

hbase-server/src/test/java/org/apache/hadoop/hbase/rest/TestGZIPResponseWrapper.java

@@ -0,0 +1,117 @@
+/**
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.apache.hadoop.hbase.rest;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.io.IOException;
+
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.hadoop.hbase.SmallTests;
+import org.apache.hadoop.hbase.rest.filter.GZIPResponseStream;
+import org.apache.hadoop.hbase.rest.filter.GZIPResponseWrapper;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+@Category(SmallTests.class)
+public class TestGZIPResponseWrapper {
+
+  private final HttpServletResponse response = mock(HttpServletResponse.class);
+  private final GZIPResponseWrapper wrapper = new GZIPResponseWrapper(response);
+  
+  /**
+   * wrapper should set all headers except "content-length"
+   */
+  @Test
+  public void testHeader() throws IOException {
+    wrapper.setStatus(200);
+    verify(response).setStatus(200);
+    wrapper.addHeader("header", "header value");
+    verify(response).addHeader("header", "header value");
+    wrapper.addHeader("content-length", "header value2");
+    verify(response, never()).addHeader("content-length", "header value");
+
+    wrapper.setIntHeader("header", 5);
+    verify(response).setIntHeader("header", 5);
+    wrapper.setIntHeader("content-length", 4);
+    verify(response, never()).setIntHeader("content-length", 4);
+
+    wrapper.setHeader("set-header", "new value");
+    verify(response).setHeader("set-header", "new value");
+    wrapper.setHeader("content-length", "content length value");
+    verify(response, never()).setHeader("content-length", "content length value");
+
+    wrapper.sendRedirect("location");
+    verify(response).sendRedirect("location");
+    
+    wrapper.flushBuffer();
+    verify(response).flushBuffer();
+  }
+
+  @Test
+  public void testResetBuffer() throws IOException {
+    when(response.isCommitted()).thenReturn(false);
+    ServletOutputStream out = mock(ServletOutputStream.class);
+    when(response.getOutputStream()).thenReturn(out);
+
+    ServletOutputStream servletOutput = wrapper.getOutputStream();
+    assertEquals(GZIPResponseStream.class, servletOutput.getClass());
+    wrapper.resetBuffer();
+    verify(response).setHeader("Content-Encoding", null);
+
+    when(response.isCommitted()).thenReturn(true);
+    servletOutput = wrapper.getOutputStream();
+    assertEquals(out.getClass(), servletOutput.getClass());
+    assertNotNull(wrapper.getWriter());
+  }
+
+  @Test
+  public void testReset() throws IOException {
+    when(response.isCommitted()).thenReturn(false);
+    ServletOutputStream out = mock(ServletOutputStream.class);
+    when(response.getOutputStream()).thenReturn(out);
+
+    ServletOutputStream servletOutput = wrapper.getOutputStream();
+    verify(response).addHeader("Content-Encoding", "gzip");
+    assertEquals(GZIPResponseStream.class, servletOutput.getClass());
+    wrapper.reset();
+    verify(response).setHeader("Content-Encoding", null);
+
+    when(response.isCommitted()).thenReturn(true);
+    servletOutput = wrapper.getOutputStream();
+    assertEquals(out.getClass(), servletOutput.getClass());
+  }
+
+  @Test
+  public void testSendError() throws IOException {
+    wrapper.sendError(404);
+    verify(response).sendError(404);
+
+    wrapper.sendError(404, "error message");
+    verify(response).sendError(404, "error message");
+  }
+
+}