refine initialization and collection reporting, introduce a progress bar

testing/test_skipping.py

@@ -414,8 +414,6 @@ def test_skipped_reasons_functional(testdir):
     )
     result = testdir.runpytest('--report=skipped')
     result.stdout.fnmatch_lines([
-        "*test_two.py S",
-        "*test_one.py ss",
         "*SKIP*3*conftest.py:3: test",
     ])
     assert result.ret == 0