ref-manual/classes.rst: document the ptest-python-pytest class and variables

Add documentation for the ptest-python-pytest class, and the
PTEST_PYTEST_DIR variable which can be overriden.

(From yocto-docs rev: 1abee62c2b9f32dfa42782893940f211db930b4c)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 41bda5d0d6..8e0833bff4 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -7110,6 +7110,16 @@ system and gives an overview of their function and contents.
       at build time should be done by adding "ptest" to (or removing it
       from) :term:`DISTRO_FEATURES`.
 
+   :term:`PTEST_PYTEST_DIR`
+      Within the :ref:`ref-classes-ptest-python-pytest` class, the
+      :term:`PTEST_PYTEST_DIR` variable represents the path within the source
+      tree of a Python package holding the unit tests to be tested with the
+      `pytest <https://docs.pytest.org>`__ framework. The default value for this
+      variable is ``tests``.
+
+      For more information, see
+      the :ref:`ref-classes-ptest-python-pytest` class documentation.
+
    :term:`PV`
       The version of the recipe. The version is normally extracted from the
       recipe filename. For example, if the recipe is named