added tests for SWIG demo

Author: PythonCHB

Examples/week-08-extensions/swig/README.rst

@@ -0,0 +1,16 @@
+Simple SWIG Example
+===================
+
+This dir has a very, very simple example of using SWIG to generate a
+wrapper around a simple C function.
+
+The logic, such as it is, is in the add.i interface file.
+
+To build, siply call:
+
+python ./setup.py build_ext --in_place
+
+distutils understands SWIG, so it will run SWIG for you.
+
+You, of course, need to have SWIG isntalled on your system.
+

Examples/week-08-extensions/swig/add.py

@@ -4,10 +4,6 @@
 # Do not make changes to this file unless you know what you are doing--modify
 # the SWIG interface file instead.
 
-
-
-
-
 from sys import version_info
 if version_info >= (2, 6, 0):
     def swig_import_helper():

Examples/week-08-extensions/swig/test_add.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+
+"""
+simple test file for SWIG-ified add function
+"""
+
+import pytest
+
+from add import add
+
+
+def test_add1():
+    assert add(3, 4) == 7
+
+
+def test_add_float():
+    # only integers!
+    with pytest.raises(TypeError):
+        assert add(3.1, 4.1) == 7.2
+
+
+def test_add_string():
+    # only integers!
+    with pytest.raises(TypeError):
+        assert add('2', 4) == 6