that's too much!

.venv/lib/python3.12/site-packages/geopandas/tests/test_compat.py

@@ -0,0 +1,30 @@
+import pytest
+
+from geopandas._compat import import_optional_dependency
+
+
+def test_import_optional_dependency_present():
+    # pandas is not optional, but we know it is present
+    pandas = import_optional_dependency("pandas")
+    assert pandas is not None
+
+    # module imported normally must be same
+    import pandas as pd
+
+    assert pandas == pd
+
+
+def test_import_optional_dependency_absent():
+    with pytest.raises(ImportError, match="Missing optional dependency 'foo'"):
+        import_optional_dependency("foo")
+
+    with pytest.raises(ImportError, match="foo is required"):
+        import_optional_dependency("foo", extra="foo is required")
+
+
+@pytest.mark.parametrize(
+    "bad_import", [["foo"], 0, False, True, {}, {"foo"}, {"foo": "bar"}]
+)
+def test_import_optional_dependency_invalid(bad_import):
+    with pytest.raises(ValueError, match="Invalid module name"):
+        import_optional_dependency(bad_import)