Warn when a search query exceeds Spotify's length limit

tests/unit/test_client.py

@@ -0,0 +1,32 @@
+import unittest
+import unittest.mock as mock
+
+from spotipy import Spotify
+
+
+class SearchQueryLengthTest(unittest.TestCase):
+
+    def setUp(self):
+        self.spotify = Spotify(auth="TOKEN")
+
+    @mock.patch.object(Spotify, "_internal_call", return_value={})
+    def test_long_query_warns(self, _internal_call):
+        query = "a" * (Spotify.max_search_query_length + 1)
+        with self.assertLogs("spotipy.client", level="WARNING") as logs:
+            self.spotify.search(query)
+        self.assertTrue(
+            any("character limit" in message or "character" in message
+                for message in logs.output)
+        )
+
+    @mock.patch.object(Spotify, "_internal_call", return_value={})
+    def test_short_query_does_not_warn(self, _internal_call):
+        query = "a" * Spotify.max_search_query_length
+        logger = "spotipy.client"
+        with self.assertRaises(AssertionError):
+            with self.assertLogs(logger, level="WARNING"):
+                self.spotify.search(query)
+
+
+if __name__ == "__main__":
+    unittest.main()