Add tests

tests/test_extract_video_id.py

@@ -0,0 +1,55 @@
+from pytchat.util.extract_video_id import extract_video_id
+from pytchat.exceptions import InvalidVideoIdException
+
+VALID_TEST_PATTERNS = (
+    ("ABC_EFG_IJK", "ABC_EFG_IJK"),
+    ("vid_test_be", "vid_test_be"),
+    ("https://www.youtube.com/watch?v=123_456_789", "123_456_789"),
+    ("https://www.youtube.com/watch?v=123_456_789&t=123s", "123_456_789"),
+    ("www.youtube.com/watch?v=123_456_789", "123_456_789"),
+    ("watch?v=123_456_789", "123_456_789"),
+    ("youtube.com/watch?v=123_456_789", "123_456_789"),
+    ("http://youtu.be/ABC_EFG_IJK", "ABC_EFG_IJK"),
+    ("youtu.be/ABC_EFG_IJK", "ABC_EFG_IJK"),
+    ("https://www.youtube.com/watch?v=ABC_EFG_IJK&list=XYZ_ABC_12345&start_radio=1&t=1", "ABC_EFG_IJK"),
+    ("https://www.youtube.com/embed/ABC_EFG_IJK", "ABC_EFG_IJK"),
+    ("www.youtube.com/embed/ABC_EFG_IJK", "ABC_EFG_IJK"),
+    ("youtube.com/embed/ABC_EFG_IJK", "ABC_EFG_IJK")
+)
+
+INVALID_TEST_PATTERNS = (
+    ("", ""),
+    ("0123456789", "0123456789"),  # less than 11 letters id
+    ("more_than_11_letter_string", "more_than_11_letter_string"),
+    ("https://www.youtube.com/watch?v=more_than_11_letter_string", "more_than_11_letter_string"),
+    ("https://www.youtube.com/channel/123_456_789", "123_456_789"),
+)
+
+TYPEERROR_TEST_PATTERNS = (
+    (100, 100),  # not string
+    (["123_456_789"], "123_456_789"),  # not string
+)
+
+
+def test_extract_valid_pattern():
+    for pattern in VALID_TEST_PATTERNS:
+        ret = extract_video_id(pattern[0])
+        assert ret == pattern[1]
+
+
+def test_extract_invalid_pattern():
+    for pattern in INVALID_TEST_PATTERNS:
+        try:
+            extract_video_id(pattern[0])
+            assert False
+        except InvalidVideoIdException:
+            assert True
+
+
+def test_extract_typeerror_pattern():
+    for pattern in TYPEERROR_TEST_PATTERNS:
+        try:
+            extract_video_id(pattern[0])
+            assert False
+        except TypeError:
+            assert True