feat: Add regression test

Add regression test for following API:
* mam_recv_msg
* mam_send_msg

the test of `mam_recv_msg()` is done with python module `requests`
the test of `mam_send_msg()` is done with curl

tests/regression/runner.py

@@ -0,0 +1,155 @@
+# Run in Python3
+import json
+import requests
+import sys
+import subprocess
+import unittest
+
+if len(sys.argv) == 2:
+    raw_url = sys.argv[1]
+else:
+    raw_url = "localhost:8000"
+url = "http://" + raw_url
+headers = {'content-type': 'application/json'}
+
+# Utils:
+TIMEOUT = 100  # [sec]
+MSG_STATUS_CODE_405 = "[405] Method Not Allowed"
+CURL_EMPTY_REPLY = "000"
+
+
+def is_addr_trytes(trytes):
+    tryte_alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ9"
+    if len(trytes) != 81:
+        return False
+
+    for char in trytes:
+        if char not in tryte_alphabet:
+            return False
+
+    return True
+
+
+def API(get_query, get_data=None, post_data=None):
+    try:
+        if get_data is not None:
+            r = requests.get(str(url + get_query + get_data), timeout=TIMEOUT)
+            if r.status_code == 405:
+                response = MSG_STATUS_CODE_405
+            else:
+                response = r.text
+
+        elif post_data is not None:
+            command = "curl " + str(
+                url + get_query
+            ) + " -X POST -H 'Content-Type: application/json' -w \", %{http_code}\" -d '" + str(
+                post_data) + "'"
+            p = subprocess.Popen(command,
+                                 shell=True,
+                                 stdout=subprocess.PIPE,
+                                 stderr=subprocess.PIPE)
+            out, err = p.communicate()
+            # print("err = " + str(err))
+            response = str(out.decode('ascii'))
+        else:
+            print("Wrong request method")
+            response = None
+
+    except BaseException:
+        print(url, "Timeout!")
+        print('\n    ' + repr(sys.exc_info()))
+        return None
+    if not response:
+        response = ""
+    return response
+
+
+class Regression_Test(unittest.TestCase):
+    def test_mam_send_msg(self):
+        """ cmd
+            0. English char only msg [success]
+            1. ASCII symbols msg [success]
+            2. Chinese msg [failed] curl response: "curl: (52) Empty reply from server"
+            3. Japanese msg [failed] curl response: "curl: (52) Empty reply from server"
+            4. Empty msg [failed]
+            5. Non-JSON, plain text msg [failed]
+            6. JSON msg with wrong key (not "message") [failed]
+        """
+        test_cases = [
+            "ToBeOrNotToBe", "I met my soulmate. She didnt", "當工程師好開心阿",
+            "今夜は月が綺麗ですね", "", "Non-JSON, plain text msg",
+            "JSON msg with wrong key"
+        ]
+
+        pass_case = [0, 1]
+        for i in range(len(test_cases)):
+            if i not in pass_case:
+                test_cases[i].encode(encoding='utf-8')
+
+        response = []
+        for i in range(len(test_cases)):
+            print("testing case = " + str(test_cases[i]))
+            if i == 5:
+                post_data_json = test_cases[i]
+            elif i == 6:
+                post_data = {"notkey": test_cases[i]}
+                post_data_json = json.dumps(post_data)
+            else:
+                post_data = {"message": test_cases[i]}
+                post_data_json = json.dumps(post_data)
+            response.append(API("/mam/", post_data=post_data_json))
+
+        for i in range(len(response)):
+            if i in pass_case:
+                res_split = response[i].split(", ")
+                res_json = json.loads(res_split[0])
+                self.assertTrue(is_addr_trytes(res_json["channel"]))
+                self.assertTrue(is_addr_trytes(res_json["bundle_hash"]))
+            else:
+                self.assertTrue(CURL_EMPTY_REPLY in response[i])
+
+    def test_mam_recv_msg(self):
+        """ cmd
+            1. Correct exist MAMv2 msg [success]
+            2. Empty msg [failed] empty parameter causes http error 405
+            3. Unicode msg [failed] {\"message\":\"Internal service error\"}
+            4. Not existing bundle hash (address)
+        """
+        test_cases = [
+            "QBFXQETKSHDYPFUDO9ILVCAVQIXOHXKCECZYFLPBNVIX9JUXQZJE9URQEEUWPWYZOIACTCGZX9IDIODCA",
+            "", "生れてすみません"
+        ]
+        expect_cases = [
+            "{\"message\":\"jjjjjjjjj\"}", MSG_STATUS_CODE_405,
+            MSG_STATUS_CODE_405
+        ]
+
+        response = []
+        for t_case in test_cases:
+            print("testing case = " + t_case)
+            response.append(API("/mam/", get_data=t_case))
+
+        self.assertEqual(len(expect_cases), len(test_cases))
+        for i in range(len(test_cases)):
+            self.assertTrue(expect_cases[i] in response[i])
+
+
+"""
+    API List
+        mam_recv_msg: GET
+        mam_send_msg: POST
+        Find transactions by tag
+        Get transaction object
+        Find transaction objects by tag
+        Get transaction object
+        Find transaction objects by tag
+        Fetch pair tips which base on GetTransactionToApprove
+        Fetch all tips
+        Generate an unused address
+        send transfer
+        Client bad request
+"""
+
+# Run all the API Test here
+if __name__ == '__main__':
+    unittest.main(argv=['first-arg-is-ignored'], exit=False)