alamb commented on code in PR #17307:
URL: https://github.com/apache/datafusion/pull/17307#discussion_r2300826022
##########
datafusion/core/tests/catalog/memory.rs:
##########
@@ -47,6 +47,20 @@ fn memory_catalog_dereg_nonempty_schema() {
assert!(cat.deregister_schema("foo", true).unwrap().is_some());
}
+#[test]
+fn memory_catalog_dereg_nonempty_schema_with_table_removal() {
+ let cat = Arc::new(MemoryCatalogProvider::new()) as Arc<dyn
CatalogProvider>;
+
+ let schema = Arc::new(MemorySchemaProvider::new()) as Arc<dyn
SchemaProvider>;
+ let test_table =
+ Arc::new(EmptyTable::new(Arc::new(Schema::empty()))) as Arc<dyn
TableProvider>;
+ schema.register_table("t".into(), test_table).unwrap();
+
+ cat.register_schema("foo", schema.clone()).unwrap();
+ schema.deregister_table("t").unwrap();
+ assert!(cat.deregister_schema("foo", false).unwrap().is_some());
Review Comment:
I see this just follows the pattern of the existing tests in this module, so
that is good
I think a better pattern for checking errors is to verify that the error is
actually the error that is expected (to make sure it isn't an error in the test
setup, for example).
Something like
```suggestion
let err = cat.deregister_schema("foo", false).unwrap_err().to_string();
assert!(err.contains("expected error message"), "Can't find expected in
{err}"));
```
That would be a nice follow on PR
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