Add tests for full coverage of TextFeatures validation and tags

Author: ankitlade12

tests/test_text/test_text_features.py

@@ -242,3 +242,26 @@ def test_lowercase_count(self):
         X_tr = transformer.fit_transform(X)
 
         assert X_tr["text_lowercase_count"].tolist() == [4, 0]
+
+    def test_variables_list_non_strings_raises_error(self):
+        """Test that a list of non-string variables raises ValueError."""
+        with pytest.raises(ValueError, match="variables must be"):
+            TextFeatures(variables=[1, 2])
+
+    def test_features_list_non_strings_raises_error(self):
+        """Test that a list of non-string features raises ValueError."""
+        with pytest.raises(ValueError, match="features must be"):
+            TextFeatures(features=[1, 2])
+
+    def test_more_tags(self):
+        """Test _more_tags returns expected tags."""
+        transformer = TextFeatures()
+        tags = transformer._more_tags()
+        assert tags["allow_nan"] is True
+        assert tags["variables"] == "categorical"
+
+    def test_sklearn_tags(self):
+        """Test __sklearn_tags__ returns expected tags."""
+        transformer = TextFeatures()
+        tags = transformer.__sklearn_tags__()
+        assert tags.input_tags.allow_nan is True