diff --git a/README.md b/README.md
index ba18187..c70220b 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 Toolchain to define and verify REST API in BDD.
 
+
 [![Build Status](http://img.shields.io/pypi/v/bddrest.svg)](https://pypi.python.org/pypi/bddrest)
 
 Table of Contents
diff --git a/bddrest/tests/test_assertion.py b/bddrest/tests/test_assertion.py
new file mode 100644
index 0000000..472e1c5
--- /dev/null
+++ b/bddrest/tests/test_assertion.py
@@ -0,0 +1,76 @@
+import cgi
+import functools
+import json
+import tempfile
+import unittest
+
+from bddrest.authoring import given, when, then, composer, response, and_
+from bddrest.exceptions import InvalidUrlParametersError, CallVerifyError
+from bddrest.specification import Call, When
+from bddrest.story import Story
+
+
+def wsgi_application(environ, start_response):
+    form = cgi.FieldStorage(
+        fp=environ['wsgi.input'],
+        environ=environ,
+        strict_parsing=False,
+        keep_blank_values=True
+    )
+
+    try:
+        code = int(form['activationCode'].value) ^ 1234
+    except ValueError:
+        start_response('400 Bad Request', [('Content-Type', 'text/plain;utf-8')])
+        return
+
+    start_response('200 OK', [
+        ('Content-Type', 'application/json;charset=utf-8'),
+        ('X-Pagination-Count', '10')
+    ])
+    result = json.dumps(dict(
+        secret='ABCDEF',
+        code=code,
+        query=environ['QUERY_STRING']
+    ))
+    yield result.encode()
+
+
+class AssertionTestCase(unittest.TestCase):
+
+    def test_equality(self):
+
+        call = dict(
+            title='Binding and registering the device after verifying the activation code',
+            description=\
+                'As a new visitor I have to bind my device with activation code and phone number',
+            url='/apiv1/devices/name: SM-12345678',
+            verb='POST',
+            as_='visitor',
+            query=dict(
+                a=1,
+                b=2
+            ),
+            form=dict(
+                activationCode='746727',
+                phone='+9897654321'
+            )
+        )
+        with given(wsgi_application, **call):
+            then(
+                response.status == '200 OK',
+                response.status_code == 200
+            )
+            when(
+                'Trying invalid code',
+                form=dict(
+                    activationCode='badCode'
+                )
+            )
+
+            then(response.status_code == 400)
+
+
+if __name__ == '__main__':  # pragma: no cover
+    unittest.main()
+