add rudimentary testing

prinia/utils.py

@@ -48,7 +48,7 @@ def is_at_least_version_samtools(version_str, version_tupl):
     :raises TypeError: if version_tupl contains non-integer
     """
     regex = re.compile('^(\d+)\.(\d+).*$')
-    if "_" not in version_str:
+    if " " not in version_str:
         match = regex.match(version_str)
     else:
         match = regex.match(version_str.split(" ")[-1])

requirements-dev.txt

+flake8
+pytest
+pytest-cov
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tests/test_utils.py

+"""
+test_utils.py
+~~~~~~~~~~~~~
+
+:copyright: (c) 2018 Sander Bollen
+:copyright: (c) 2018 Leiden University Medical Center
+:license: MIT
+"""
+import pytest
+
+from prinia.utils import is_at_least_version_samtools
+
+samtools_version_data = [
+    ("1.9-33-g2d34e15", (1, 3), True),
+    ("1.2-33-g2d34e15", (1, 3), False),
+    ("1.9", (1, 3), True),
+    ("1.2", (1, 3), False),
+    ("samtools 1.9-33-g2d34e15", (1, 3), True),
+    ("samtools 1.9", (1, 3), True),
+    ("samtools 1.2", (1, 3), False)
+]
+
+
+@pytest.mark.parametrize("version_str, version_tupl, expected",
+                         samtools_version_data)
+def test_is_at_least_version_samtools(version_str, version_tupl, expected):
+    val = is_at_least_version_samtools(version_str, version_tupl)
+    assert val == expected

tox.ini

+[tox]
+envlist = py27, py34
+
+[testenv]
+usedevelop = True
+
+commands =
+    # flake8 --statistics tests prinia
+    py.test --cov=prinia --cov-report term-missing tests prinia
+
+deps =
+    -rrequirements.txt
+    -rrequirements-dev.txt
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