Add initial test, fix update travis config

.travis.yml

@@ -3,8 +3,12 @@ python:
   - "3.5"
 install:
   - pip install -r requirements.txt
+
+  # See https://gist.github.com/dan-blanchard/7045057
+  - pip install --upgrade pip setuptools wheel
+  - pip install --only-binary=numpy,scipy numpy scipy
 script:
-  - python -m unittest discover --pattern=*_test.py
+  - python -m unittest discover tests
 notifications:
   email:
     on_success: never

tests/test_utils.py

@@ -0,0 +1,27 @@
+import unittest
+import utils
+
+from tempfile import mkdtemp
+from shutil import rmtree
+from os import path
+
+
+class TestUtils(unittest.TestCase):
+    def setUp(self):
+        self.test_dir = mkdtemp()
+
+    def tearDown(self):
+        rmtree(self.test_dir)
+
+    def test_read_text_file(self):
+        file_path = path.join(self.test_dir, 'tmp.txt')
+        content = 'test'
+
+        with open(file_path, 'w') as f:
+            f.write(content)
+
+        self.assertEqual(utils.read_text_file(file_path), content)
+
+
+if __name__ == '__main__':
+    unittest.main()