Added unit tests, created functions to check the availability of updates.

tests/test_update_regex.py

@@ -0,0 +1,43 @@
+import unittest
+from re import fullmatch, compile, Pattern
+
+
+class TestUpdateRegex(unittest.TestCase):
+    """
+    Test Class for Update Regex
+
+    Versions can vary between 0.0.0 and 99.99.99 and cannot exceed two units.
+    0.0.0 to 0.99.99 = BETA
+    1.0.0 to 99.99.99 = RELEASE
+    """
+    regex: Pattern = compile(r'^(\d{1,2}\.)(\d{1,2}\.)(\d{1,2})$')
+
+    def test_first_version(self):
+        self.assertTrue(fullmatch(self.regex, '1.0.0'))
+    
+    def test_patch_version(self):
+        self.assertTrue(fullmatch(self.regex, '1.0.00'))
+        self.assertTrue(fullmatch(self.regex, '1.0.1'))
+        self.assertTrue(fullmatch(self.regex, '1.0.12'))
+        self.assertTrue(fullmatch(self.regex, '1.0.54'))
+    
+    def test_minor_version(self):
+        self.assertTrue(fullmatch(self.regex, '1.00.0'))
+        self.assertTrue(fullmatch(self.regex, '1.1.0'))
+        self.assertTrue(fullmatch(self.regex, '1.98.0'))
+        self.assertTrue(fullmatch(self.regex, '1.24.0'))
+    
+    def test_major_version(self):
+        self.assertTrue(fullmatch(self.regex, '00.0.0'))
+        self.assertTrue(fullmatch(self.regex, '10.0.0'))
+        self.assertTrue(fullmatch(self.regex, '99.0.0'))
+        self.assertTrue(fullmatch(self.regex, '42.0.0'))
+
+    def test_bad_version(self):
+        self.assertFalse(fullmatch(self.regex, '1.0.0000'))
+        self.assertFalse(fullmatch(self.regex, '1.00000.0'))
+        self.assertFalse(fullmatch(self.regex, '100.0.0'))
+        self.assertFalse(fullmatch(self.regex, '152.124.15'))
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_update_utils.py

@@ -0,0 +1,42 @@
+import unittest
+from urllib.error import HTTPError, URLError
+from test_update_regex import TestUpdateRegex
+from webpicdownloader.util.UpdateUtils import fetch_version, is_new_version_available
+
+class TestUpdateUtils(unittest.TestCase):
+    """
+    Test Class for Update Utils
+    <!> can not be executed directly <!>
+
+    * regex -> use UpdateRegex unittest regex.
+    * good_url -> use a permalink VERSION file.
+    * bad_url -> bad link that point a 404 error.
+    * bad_version -> use a permalink VERSION file for wich version format is bad.
+    """
+    regex = TestUpdateRegex.regex
+    good_url = 'https://git.endmove.eu/EndMove/WebPicDownloader/raw/commit/6b26b89c6901841faaa09154c185d202223492c2/VERSION'
+    bad_url = 'https://git.endmove.eu/EndMove/WebPicDownloader/raw/commit/bad-commit/VERSION'
+    bad_version = 'https://git.endmove.eu/EndMove/WebPicDownloader/src/commit/6b26b89c6901841faaa09154c185d202223492c2/app_version_file.txt'
+    
+    def test_fetch_version__good_url(self):
+        self.assertTrue(fetch_version(self.good_url) == '1.0.0')
+    
+    def test_fetch_version__bad_url(self):
+        self.assertRaises(HTTPError, lambda: fetch_version(self.bad_url))
+        self.assertRaises(URLError, lambda: fetch_version('https://bad'))
+        self.assertRaises(ValueError, lambda: fetch_version('bad'))
+
+    def test_is_new_version_available__new_version_available(self):
+        self.assertTrue(is_new_version_available('0.0.0', self.good_url, self.regex))
+        self.assertTrue(is_new_version_available('0.48.0', self.good_url, self.regex))
+        self.assertTrue(is_new_version_available('0.48.14', self.good_url, self.regex))
+        self.assertTrue(is_new_version_available('5.48.14', self.good_url, self.regex))
+    
+    def test_is_new_version_available__no_new_version_available(self):
+        self.assertFalse(is_new_version_available('1.0.0', self.good_url, self.regex))
+
+    def test_is_new_version_available__bad_version(self):
+        self.assertRaises(ValueError, lambda: is_new_version_available('1.0.0', self.bad_version, self.regex))
+
+    def test_is_new_version_available__bad_url(self):
+        self.assertRaises(HTTPError, lambda: is_new_version_available('1.0.0', self.bad_url, self.regex))