1[/ 2 / Copyright (c) 2015 Raffi Enficiaud 3 / Copyright (c) 2015 Andrzej Krzemienski 4 / 5 / Distributed under the Boost Software License, Version 1.0. (See accompanying 6 / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 7 /] 8 9[section:tests_grouping Grouping tests into logical units by labels] 10 11Test-suites and test cases define a hierarchy called the /test tree/, which is useful for organizing tests. These 12organization defines an implicit grouping of test unit following the /subtrees/ extracted from the test tree, by just 13designing a node on the test tree. Being able to design a group of tests enable, for instance, to execute this group of 14test only (covered in [link boost_test.runtime_config.test_unit_filtering this section]). 15 16However, the subtrees might not reflect all the possible grouping of test units the usage of the test module would 17require [footnote For instance, selecting two siblings without the parent node]. 18 19The __UTF__ provides a flexible way of grouping test units by the use of /labels/, using the decorator 20__decorator_label__. It is possible to associate more than one label with a test unit. 21 22Labels can be associated to test cases and test suites. For the latter, the label is inherited by all the nodes in the 23subtree defined by the labelled test suite: decorating a test suite with label `L` is equivalent to decorating every test 24unit inside with `L`. 25 26 27[bt_example decorator_04..decorator label..run-fail] 28 29 30[endsect] 31