fix(utils): preserve QQ image URL scheme

tests/unit_tests/utils/__init__.py

@@ -0,0 +1 @@
+

tests/unit_tests/utils/test_image.py

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+from langbot.pkg.utils.image import get_qq_image_downloadable_url
+
+
+def test_get_qq_image_downloadable_url_preserves_https_scheme():
+    url, query = get_qq_image_downloadable_url('https://gchat.qpic.cn/gchatpic_new/abc/0?term=2&is_origin=1')
+
+    assert url == 'https://gchat.qpic.cn/gchatpic_new/abc/0'
+    assert query == {'term': ['2'], 'is_origin': ['1']}
+
+
+def test_get_qq_image_downloadable_url_preserves_http_scheme():
+    url, query = get_qq_image_downloadable_url('http://gchat.qpic.cn/gchatpic_new/abc/0?term=2')
+
+    assert url == 'http://gchat.qpic.cn/gchatpic_new/abc/0'
+    assert query == {'term': ['2']}
+
+
+def test_get_qq_image_downloadable_url_defaults_missing_scheme_to_http():
+    url, query = get_qq_image_downloadable_url('gchat.qpic.cn/gchatpic_new/abc/0?term=2')
+
+    assert url == 'http://gchat.qpic.cn/gchatpic_new/abc/0'
+    assert query == {'term': ['2']}