support/testing: add test for python-distro

This commit add a simple test checking the reported distro name and
id are Buildroot (as reported by /etc/os-release).

Signed-off-by: Julien Olivain <ju.o@free.fr>
[Arnout: drop python2 variant]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

DEVELOPERS

@@ -1604,7 +1604,9 @@ F:	package/python-gnupg/
 F:	package/python-pyalsa/
 F:	package/riscv-isa-sim/
 F:	package/zynaddsubfx/
+F:	support/testing/tests/package/sample_python_distro.py
 F:	support/testing/tests/package/sample_python_gnupg.py
+F:	support/testing/tests/package/test_python_distro.py
 F:	support/testing/tests/package/test_python_gnupg.py
 
 N:	Julien Viard de Galbert <julien@vdg.name>

support/testing/tests/package/sample_python_distro.py

@@ -0,0 +1,4 @@
+import distro
+
+assert(distro.name() == 'Buildroot')
+assert(distro.id() == 'buildroot')

support/testing/tests/package/test_python_distro.py

@@ -0,0 +1,11 @@
+from tests.package.test_python import TestPythonPackageBase
+
+
+class TestPythonPy3Distro(TestPythonPackageBase):
+    __test__ = True
+    config = TestPythonPackageBase.config + \
+        """
+        BR2_PACKAGE_PYTHON3=y
+        BR2_PACKAGE_PYTHON_DISTRO=y
+        """
+    sample_scripts = ["tests/package/sample_python_distro.py"]