.I value
is stored in the named register.
.PP
+A test environment fits in between
+the framework and the test function.
+It can establish hook functions which are called
+at various stages during the test group.
+.hP \*o
+The
+.I setup
+hook is called once at the start of the test group.
+.hP \*o
+The
+.I teardown
+hook is called once at the end of the test group.