protected static void prepareTestWebapp() throws IOException {
    String webapps = System.getProperty(TEST_BUILD_WEBAPPS, BUILD_WEBAPPS_DIR);
    File testWebappDir = new File(webapps + File.separatorChar + TEST);
    if (!testWebappDir.exists()) {
      fail("Test webapp dir " + testWebappDir.getCanonicalPath() + " missing");
    }
  }
Prepare the test webapp by creating the directory from the test properties fail if the
directory cannot be created.
@throws IOException    if an error occurred
@throws AssertionError if a condition was not met
hbase-http/src/test/java/org/apache/hadoop/hbase/http/HttpServerFunctionalTest.java