Smoke tests for assorted plugins (#7721)

Co-authored-by: Bruno Oliveira <nicoddemus@gmail.com>
Co-authored-by: Thomas Grainger <tagrain@gmail.com>
Co-authored-by: Kyle Altendorf <sda@fstab.net>

testing/plugins_integration/simple_integration.py

@@ -0,0 +1,10 @@
+import pytest
+
+
+def test_foo():
+    assert True
+
+
+@pytest.mark.parametrize("i", range(3))
+def test_bar(i):
+    assert True