+ fun baz_1 is test do
+ assert subject.baz(1, 2) == 3
+ end
+
+ fun baz_2 is test do
+ assert subject.baz(1, -2) == -1
+ end
+end
+~~~
+
+When using custom test attributes, a empty init must be declared to allow automatic test running.
+
+At class level, `before_all` and `after_all` annotations can be set on methods that must be called before/after all the test cases in the class:
+
+~~~
+class TestFoo
+ test
+
+ var subject: Foo is noinit
+
+ # Method executed before all tests in the class
+ fun set_up is before_all do
+ subject = new Foo
+ end
+
+ fun baz_1 is test do
+ assert subject.baz(1, 2) == 3
+ end
+
+ fun baz_2 is test do
+ assert subject.baz(1, -2) == -1
+ end
+end
+~~~
+
+`before_all` and `after_all` annotations can also be set on methods that must be called before/after each test suite when declared at top level:
+
+~~~
+module test_bdd_connector
+
+import bdd_connector
+
+# Testing the bdd_connector
+class TestConnector
+ test
+ # test cases using a server
+end
+
+# Method executed before testing the module
+fun setup_db is before_all do
+ # start server before all test cases
+end
+
+# Method executed after testing the module
+fun teardown_db is after_all do
+ # stop server after all test cases
+end
+~~~
+
+When dealing with multiple test suites, niunit allows you to import other test suites to factorize your tests:
+
+~~~
+module test_bdd_users
+
+import test_bdd_connector
+
+# Testing the user table
+class TestUsersTable
+ test
+ # test cases using the db server from `test_bdd_connector`
+end
+
+fun setup_table is before_all do
+ # create user table
+end
+
+fun teardown_table is after_all do
+ # drop user table
+end
+~~~
+
+Methods with `before*` and `after*` annotations are linearized and called in different ways.
+
+* `before*` methods are called from the least specific to the most specific
+* `after*` methods are called from the most specific to the least specific
+
+In the previous example, the execution order would be:
+
+1. `test_bdd_connector::setup_db`
+2. `test_bdd_users::setup_table`
+3. `all test cases from test_bdd_users`
+4. `test_bdd_users::teardown_table`
+5. `test_bdd_connector::teardown_db`
+
+## Accessing the test suite environment
+
+The `NIT_TESTING_PATH` environment variable contains the current test suite
+file path.
+Nitunit define this variable before the execution of each test suite.
+It can be used to access files based on the current test suite location:
+
+~~~
+class TestWithPath
+ test
+
+ fun test_suite_path do
+ assert "NIT_TESTING_PATH".environ != ""