feat: Switch from nosetest to pytest (#10177)

* Switch from nosetest to pytest

Fix schedule tests

Collect pytest coverage

Move pytest config into pytest.ini

Move cov to the pytest.ini

* Append coverage for the 2nd run

* Add coverage to all commands

* Coverage only for tests

* Get coverage from 1 place

* Rename classes to be  pytest compatible

* Test coverage for examples and tests

* Max diff to -1

* Explain how to run pytest for the whole project

* Do not append code coverage for the main run

* Do not run coverage on examples

Co-authored-by: bogdan kyryliuk <bogdankyryliuk@dropbox.com>

scripts/tests/run.sh

@@ -56,7 +56,7 @@ function test_init() {
   echo --------------------
   echo Load examples
   echo --------------------
-  nosetests tests/load_examples_test.py
+  pytest -s tests/load_examples_test.py
 }
 
 
@@ -145,5 +145,5 @@ fi
 
 if [ $RUN_TESTS -eq 1 ]
 then
-  nosetests --exclude=load_examples_test "${TEST_MODULE}"
+  pytest -s --ignore=load_examples_test "${TEST_MODULE}"
 fi