Add example for package recursion bug

testing/example_scripts/collect/package_infinite_recursion/conftest.py

@@ -0,0 +1,2 @@
+def pytest_ignore_collect(path):
+    return False

testing/example_scripts/collect/package_infinite_recursion/tests/test_basic.py

@@ -0,0 +1,2 @@
+def test():
+    pass

testing/python/collect.py

@@ -1577,3 +1577,9 @@ def test_keep_duplicates(testdir):
     )
     result = testdir.runpytest("--keep-duplicates", a.strpath, a.strpath)
     result.stdout.fnmatch_lines(["*collected 2 item*"])
+
+
+def test_package_collection_infinite_recursion(testdir):
+    testdir.copy_example("collect/package_infinite_recursion")
+    result = testdir.runpytest()
+    result.stdout.fnmatch_lines("*1 passed*")