should be it

external/duckdb/test/extension/load_extension.test

@@ -0,0 +1,68 @@
+# name: test/extension/load_extension.test
+# description: Try loading a shared object with an extension
+# group: [extension]
+
+require notmingw
+
+require skip_reload
+
+require allow_unsigned_extensions
+
+statement ok
+PRAGMA enable_verification
+
+statement error
+LOAD 'asdf';
+----
+<REGEX>:IO Error: Extension.*not found.*
+
+statement error
+LOAD 'Makefile';
+----
+<REGEX>:IO Error: Extension.*not found.*
+
+statement error
+LOAD NULL;
+----
+<REGEX>:Parser Error: syntax error.*
+
+statement ok
+LOAD '__BUILD_DIRECTORY__/test/extension/loadable_extension_demo.duckdb_extension';
+
+query I
+SELECT extension_version FROM duckdb_extensions() WHERE extension_name = 'loadable_extension_demo';
+----
+default-version
+
+query I
+SELECT hello('World');
+----
+10
+
+query I
+QUACK QUACK QUACK
+----
+QUACK
+QUACK
+QUACK
+
+query I
+quACk QUaCk
+----
+QUACK
+QUACK
+
+statement error
+QUAC
+----
+<REGEX>:Parser Error: Did you mean.*
+
+statement error
+QUACK NOT QUACK
+----
+<REGEX>:Parser Error: This is not a quack.*
+
+query I
+SELECT contains(loaded_extensions(), 'loadable_extension_demo')
+----
+true