generator.setCommandList(commands);
        assertTrue("Multiple commands should be settable", true);

        // Test with empty list
        generator.setCommandList(new ArrayList<>());
        assertTrue("Empty command list should be settable", true);

        // Test with single command
        generator.setCommandList(Collections.singletonList("single_command"));

            return executed.get();
        }
    }

    /**
     * Sets the list of commands to execute for thumbnail generation.
     * @param commandList The command list.
     */
    public void setCommandList(final List<String> commandList) {
        this.commandList = commandList;
    }

    /**
     * Sets the command execution timeout.
     * @param commandTimeout The timeout in milliseconds.
     */