1， Fix 'Permission denied' bug of Travis-CI command

2，Add unittest

Fix Travis-CI command

.travis.yml

@@ -34,7 +34,7 @@ before_script:
   - if [ ! -f /opt/verynginx/openresty/nginx/logs/error.log ]; then touch /opt/verynginx/openresty/nginx/logs/error.log;sudo chown nginx:nginx /opt/verynginx/openresty/nginx/logs/error.log ; fi
   - sudo /opt/verynginx/openresty/nginx/sbin/nginx 
   - sudo /opt/verynginx/openresty/nginx/sbin/nginx -s stop
-  - echo -e "127.0.0.1   a.vntest.com\n127.0.0.1   b.vntest.com\n127.0.0.1   c.vntest.com" >> /etc/hosts
+  - echo -e "127.0.0.1   a.vntest.com\n127.0.0.1   b.vntest.com\n127.0.0.1   c.vntest.com" | sudo tee -a /etc/hosts
 
 script:
   - sudo python3 test/test.py

test/testcase/a_3/case.py

@@ -18,11 +18,37 @@ def test_host_equal(self):
         assert r.status_code == 404
         assert r.headers.get('content-type') == 'text/html'
         assert 'hited' not in r.text
+
     def test_host_not_equal(self): 
-        pass
+        r = requests.get('http://a.vntest.com/testhostnotequal')
+        assert r.status_code == 404
+        assert r.headers.get('content-type') == 'text/html'
+        assert 'hited' not in r.text
+
+        r = requests.get('http://b.vntest.com/testhostnotequal')
+        assert r.status_code == 400
+        assert r.headers.get('content-type') == 'text/html'
+        assert 'hited' in r.text
 
     def test_host_match(self): 
-        pass
+        r = requests.get('http://a.vntest.com/testhostmatch')
+        assert r.status_code == 400
+        assert r.headers.get('content-type') == 'text/html'
+        assert 'hited' in r.text
+
+        r = requests.get('http://127.0.0.1/testhostmatch')
+        assert r.status_code == 404
+        assert r.headers.get('content-type') == 'text/html'
+        assert 'hited' not in r.text
 
     def test_host_not_match(self): 
-        pass
+        r = requests.get('http://a.vntest.com/testhostnotmatch')
+        assert r.status_code == 404
+        assert r.headers.get('content-type') == 'text/html'
+        assert 'hited' not in r.text
+
+        r = requests.get('http://127.0.0.1/testhostnotmatch')
+        assert r.status_code == 400
+        assert r.headers.get('content-type') == 'text/html'
+        assert 'hited' in r.text
+