Add tests

diff --git a/tests/test.py b/tests/test.py
deleted file mode 100755 (executable)
index dcbf6ff..0000000
--- a/tests/test.py
+++ /dev/null
@@ -1,4 +0,0 @@
-#! /usr/bin/env python
-
-def test():
-    assert True

diff --git a/tests/test_rof.py b/tests/test_rof.py
new file mode 100755 (executable)
index 0000000..a71b59d
--- /dev/null
+++ b/tests/test_rof.py
@@ -0,0 +1,56 @@
+#! /usr/bin/env python
+
+import shutil
+import os
+from tempfile import mkdtemp
+
+
+tmp_dir = None
+
+
+def setup():
+    global tmp_dir
+    tmp_dir = mkdtemp()
+    os.chdir(tmp_dir)
+
+
+def teardown():
+    os.chdir(os.sep)  # To the root of the FS
+    shutil.rmtree(tmp_dir)
+
+
+def create_files(files, subdirectory=None):
+    if subdirectory:
+        os.makedirs(subdirectory)
+    else:
+        subdirectory = ''
+    for fname in files:
+        with open(os.path.join(subdirectory, fname), 'w'):
+            pass
+
+
+def _test_files_exist(files):
+    for fname in files:
+        assert os.path.exists(fname)
+
+
+def _test_files_not_exist(files):
+    for fname in files:
+        assert not os.path.exists(fname)
+
+
+def test_rof():
+    create_files(['test'])
+    os.utime('test', (0, 0))
+    _test_files_exist(['test'])
+    assert os.system("remove-old-files.py --older 100 .") == 0
+    _test_files_not_exist(['test'])
+
+
+def test_recursive():
+    create_files(['test2'], 'subdir')
+    test_file = os.path.join('subdir', 'test2')
+    os.utime(test_file, (0, 0))
+    _test_files_exist([test_file])
+    assert os.system("remove-old-files.py --older 100 .") == 0
+    _test_files_not_exist([test_file])