config.addProperty("xml.fileName", "test.xml");
ConfigurationDeclaration decl =
createDeclaration(config.configurationAt("xml"));
assertNull("Found an at attribute", decl.getAt());
assertFalse("Found an optional attribute", decl.isOptional());
config.addProperty("xml[@config-at]", "test1");
decl = createDeclaration(config.configurationAt("xml"));
assertEquals("Wrong value of at attribute", "test1", decl.getAt());
config.addProperty("xml[@at]", "test2");
decl = createDeclaration(config.configurationAt("xml"));
assertEquals("Wrong value of config-at attribute", "test1",