adding pytest PoC for real devices

Signed-off-by: Peter Siegmund <developer@mars3142.org>

.gitignore

@@ -12,3 +12,4 @@ sdkconfig.old
 !.vscode/launch.json
 !.vscode/extensions.json
 .history/*
+__pycache__

pytest.ini

@@ -0,0 +1,3 @@
+[pytest]
+addopts = --embedded-services esp,idf -s
+python_files = *.py

tests/test_main.py

@@ -0,0 +1,2 @@
+def test_main(dut):
+    dut.expect('waiting for download')