package/python-waitress: new package

The test runs the flask sample app through the waitress wsgi server
instead of the flask development server.

Signed-off-by: Marcus Hoffmann <buildroot@bubu1.eu>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/package/test_python_waitress.py

@@ -0,0 +1,34 @@
+import time
+
+from tests.package.test_python import TestPythonPackageBase
+
+
+class TestPythonWaitress(TestPythonPackageBase):
+    __test__ = True
+    config = TestPythonPackageBase.config + \
+        """
+        BR2_PACKAGE_PYTHON3=y
+        BR2_PACKAGE_PYTHON_FLASK=y
+        BR2_PACKAGE_PYTHON_WAITRESS=y
+        """
+
+    sample_scripts = ["tests/package/sample_python_flask.py"]
+
+    def test_run(self):
+        self.login()
+        self.check_sample_scripts_exist()
+        cmd = self.interpreter + " -m waitress sample_python_flask:app > /dev/null 2>&1 &"
+        # give some time to setup the server
+        _, exit = self.emulator.run(cmd, timeout=self.timeout)
+
+        # Give enough time for the uvicorn server to start up
+        for attempt in range(30):
+            time.sleep(1)
+
+            cmd = "wget -q -O - http://127.0.0.1:8080/"
+            output, exit_code = self.emulator.run(cmd, timeout=self.timeout)
+            if exit_code == 0:
+                self.assertEqual(output[0], 'Hello, World!')
+                break
+        else:
+            self.assertTrue(False, "Timeout while waiting for waitress server")