Add test for data_old_files

csppfetch/test.py

@@ -818,6 +818,41 @@ class DownloaderTests(DTestCase):
                 self.assertMockFile(outdir+"/avhrr-only-v2.20170105.nc")
 
 
+class DeleteOldFilesTests(DTestCase):
+    def touch(self, filename, timestamp):
+        with open(filename, "w") as f:
+            f.write("1234567890")
+        ts = timestamp.timestamp()
+        os.utime(filename, (ts,ts))
+
+    def test_delete_old_files(self):
+        dt = datetime.datetime
+        with TemporaryDirectory() as dir:
+            os.makedirs(dir+"/foo/bar")
+            os.makedirs(dir+"/foo/qux")
+            os.makedirs(dir+"/foo/zot")
+            self.touch(dir+"/foo/qux/a", dt(2020,1,1,12,0,0))
+            self.touch(dir+"/foo/qux/b", dt(2020,1,1,11,0,0))
+            self.touch(dir+"/foo/qux/c", dt(2020,1,1,10,0,0))
+            self.touch(dir+"/foo/qux/d", dt(2020,1,1,9,0,0))
+            self.touch(dir+"/foo/e", dt(2020,1,1,9,0,0))
+
+            stats = csppfetch.delete_old_files(dir, dt(2020,1,1,10,30,0))
+            self.assertEqual(stats.num_deleted, 3)
+            self.assertEqual(stats.size_deleted, 3*10)
+            self.assertEqual(stats.num_kept, 2)
+            self.assertEqual(stats.size_kept, 2*10)
+            self.assertFileExists(dir+"/foo/qux/a")
+            self.assertFileExists(dir+"/foo/qux/b")
+            self.assertFileDoesNotExist(dir+"/foo/qux/c")
+            self.assertFileDoesNotExist(dir+"/foo/qux/d")
+            self.assertFileDoesNotExist(dir+"/foo/e")
+
+
+
+
+
+
 def add_module_doctest(tests, module, context):
     import warnings
     import doctest