assertNotNull(pluginFiles);
        // Should return empty array when plugin directory doesn't exist
        assertEquals(0, pluginFiles.length);
    }

    public void test_resolve_additionalCases() {
        // Test multiple replacements in same string
        System.setProperty("var1", "value1");
        System.setProperty("var2", "value2");

        String value = "${var1}-${var2}";