`create_single_cell_complex_heatmap(mock_seurat, character(0))` threw an error with unexpected message.
Expected match: "features must be a non-empty character vector"
Actual message: "object 'mock_seurat' not found"

test_that("create_single_cell_complex_heatmap handles invalid inputs", {
"features must be a non-empty character vector"
test_that("gene annotations are created correctly", {

"gene annotations are created correctly"