Fix:SES-Added params check in template (#3753)

* Fix:SES-Added params check in template

* Added more tests and handled message

* linting

* fixed tests

* fix attribute name in message

* fix logic for exception

moto/ses/exceptions.py

@@ -87,3 +87,13 @@ class RuleSetDoesNotExist(RESTError):
 
     def __init__(self, message):
         super(RuleSetDoesNotExist, self).__init__("RuleSetDoesNotExist", message)
+
+
+class MissingRenderingAttributeException(RESTError):
+    code = 400
+
+    def __init__(self, var):
+        super(MissingRenderingAttributeException, self).__init__(
+            "MissingRenderingAttributeException",
+            "Attribute '{0}' is not present in the rendering data.".format(var),
+        )

moto/ses/models.py

@@ -1,5 +1,6 @@
 from __future__ import unicode_literals
 
+import re
 import json
 import email
 import datetime
@@ -22,6 +23,7 @@ from .exceptions import (
     RuleSetNameAlreadyExists,
     RuleSetDoesNotExist,
     RuleAlreadyExists,
+    MissingRenderingAttributeException,
 )
 from .utils import get_random_message_id
 from .feedback import COMMON_MAIL, BOUNCE, COMPLAINT, DELIVERY
@@ -91,6 +93,17 @@ class SESQuota(BaseModel):
         return self.sent
 
 
+def are_all_variables_present(template, template_data):
+    subject_part = template["subject_part"]
+    text_part = template["text_part"]
+    html_part = template["html_part"]
+
+    for var in re.findall("{{(.+?)}}", subject_part + text_part + html_part):
+        if not template_data.get(var):
+            return var, False
+    return None, True
+
+
 class SESBackend(BaseBackend):
     def __init__(self):
         self.addresses = []
@@ -352,6 +365,10 @@ class SESBackend(BaseBackend):
                 "Template rendering data is invalid"
             )
 
+        var, are_variables_present = are_all_variables_present(template, template_data)
+        if not are_variables_present:
+            raise MissingRenderingAttributeException(var)
+
         subject_part = template["subject_part"]
         text_part = template["text_part"]
         html_part = template["html_part"]