[gemma4] update tests

tests/test_core.py

@@ -0,0 +1,30 @@
+from skillls.checker import check_content_for_errors, ParenMismatchErrorKind
+import pytest
+
+def test_check_content_no_errors():
+    content = "(defun my_func (arg) (print arg))"
+    # Should not raise any exception
+    try:
+        check_content_for_errors(content)
+    except Exception as e:
+        pytest.fail(f"Expected no error, but got {e}")
+
+def test_check_content_too_many_closed():
+    content = "())"
+    with pytest.raises(ExceptionGroup) as eg:
+        check_content_for_errors(content)
+    
+    # Check if the error type is correct
+    exceptions = eg.value.exceptions
+    assert any(isinstance(ex, Exception) and ex.kind == ParenMismatchErrorKind.TooManyClosed for ex in exceptions)
+
+def test_check_content_too_many_opened():
+    content = "((defun my_func (arg)"
+    with pytest.raises(ExceptionGroup) as eg:
+        check_content_for_errors(content)
+    
+    exceptions = eg.value.exceptions
+    assert any(isinstance(ex, Exception) and ex.kind == ParenMismatchErrorKind.TooManyOpened for ex in exceptions)
+
+def test_check_content_empty():
+    check_content_for_errors("")