fix test__server_pywsgi.py not to depend on test__server_http

greentest/test__server_pywsgi.py

@@ -4,9 +4,6 @@ from gevent import pywsgi
 import test__server
 from test__server import *
 from test__server import Settings as server_Settings
-from test__server_http import Settings as http_Settings
-
-import gevent.wsgi; gevent.wsgi.WSGIServer.__init__ = None
 
 
 def application(self, environ, start_response):
@@ -33,10 +30,40 @@ class SimpleWSGIServer(pywsgi.WSGIServer):
     application = application
 
 
-class Settings(http_Settings):
+internal_error_start = 'HTTP/1.0 500 Internal Server Error\n'.replace('\n', '\r\n')
+internal_error_end = '\n\nInternal Server Error'.replace('\n', '\r\n')
+
+internal_error503 = '''HTTP/1.0 503 Service Unavailable
+Connection: close
+Content-type: text/plain
+Content-length: 31
+
+Service Temporarily Unavailable'''.replace('\n', '\r\n')
+
+
+class Settings:
     ServerClass = pywsgi.WSGIServer
     ServerSubClass = SimpleWSGIServer
     close_socket_detected = True
+    restartable = False
+    close_socket_detected = False
+
+    @staticmethod
+    def assert500(self):
+        conn = self.makefile()
+        conn.write('GET / HTTP/1.0\r\n\r\n')
+        result = conn.read()
+        assert result.startswith(internal_error_start), (result, internal_error_start)
+        assert result.endswith(internal_error_end), (result, internal_error_end)
+
+    assertAcceptedConnectionError = assert500
+
+    @staticmethod
+    def assert503(self):
+        conn = self.makefile()
+        conn.write('GET / HTTP/1.0\r\n\r\n')
+        result = conn.read()
+        assert result == internal_error503, (result, internal_error503)
 
     @staticmethod
     def assertPoolFull(self):