3.2rc1 ASDF test_backwards_compat failed

============================= test session starts =============================
platform win32 -- Python 3.7.1, pytest-4.1.0, py-1.7.0, pluggy-0.8.0

Running tests with Astropy version 3.2rc1.
Running tests in Miniconda3\envs\py37\lib\site-packages\astropy.

Date: 2019-05-09T14:24:44

Platform: Windows-10-10.0.17763-SP0

Executable: C:\...\Miniconda3\envs\py37\python.exe

Full Python Version: 
3.7.1 (default, Oct 28 2018, 08:39:03) [MSC v.1912 64 bit (AMD64)]

encodings: sys: utf-8, locale: cp1252, filesystem: utf-8
byteorder: little
float info: dig: 15, mant_dig: 15

Numpy: 1.16.2
Scipy: 1.1.0
Matplotlib: 3.0.3
h5py: 2.8.0
Pandas: 0.23.4
Asdf: 2.3.3
Cython: 0.29
Scikit-image: not available
astropy_helpers: 3.2rc1
Using Astropy options: remote_data: any.

Matplotlib: 3.0.3
Freetype: 2.9.1
rootdir: C:\..., inifile:
plugins: xdist-1.24.0, remotedata-0.3.1, openfiles-0.3.0, mpl-0.10, forked-0.2, doctestplus-0.1.3, arraydiff-0.2
collected 12639 items

____________________________ test_backwards_compat ____________________________

    def test_backwards_compat():
        """
        Make sure that we can continue to read FITS HDUs that use the schema from
        the ASDF Standard.
    
        This test uses the examples in the fits schema from the ASDF Standard,
        since these make no reference to Astropy's own fits definition.
        """
    
        def check(asdffile):
            assert isinstance(asdffile['example'], fits.HDUList)
    
>       run_schema_example_test('stsci.edu', 'asdf', 'fits/fits', '1.0.0', check)

..\Miniconda3\envs\py37\lib\site-packages\astropy\io\misc\asdf\tags\fits\tests\test_fits.py:55: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

organization = 'stsci.edu', standard = 'asdf', name = 'fits/fits'
version = '1.0.0'
check_func = <function test_backwards_compat.<locals>.check at 0x000002316C136730>

    def run_schema_example_test(organization, standard, name, version, check_func=None):
    
        import asdf
        from asdf.tests import helpers
        from asdf.types import format_tag
        from asdf.resolver import default_resolver
    
        tag = format_tag(organization, standard, version, name)
        schema_path = urllib.parse.urlparse(default_resolver(tag)).path
    
>       with open(schema_path, 'rb') as ff:
E       OSError: [Errno 22] Invalid argument: '/C:/Users/PL/Miniconda3/envs/py37/lib/site-packages/asdf/schemas/stsci.edu/asdf/fits/fits-1.0.0.yaml'

..\Miniconda3\envs\py37\lib\site-packages\astropy\io\misc\asdf\tags\tests\helpers.py:21: OSError
____________________________ test_backwards_compat ____________________________

    def test_backwards_compat():
        """
        Make sure that we can continue to read tables that use the schema from
        the ASDF Standard.
    
        This test uses the examples in the table schema from the ASDF Standard,
        since these make no reference to Astropy's own table definition.
        """
    
        def check(asdffile):
            assert isinstance(asdffile['example'], table.Table)
    
>       run_schema_example_test('stsci.edu', 'asdf', 'core/table', '1.0.0', check)

..\Miniconda3\envs\py37\lib\site-packages\astropy\io\misc\asdf\tags\table\tests\test_table.py:244: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

organization = 'stsci.edu', standard = 'asdf', name = 'core/table'
version = '1.0.0'
check_func = <function test_backwards_compat.<locals>.check at 0x000002316C157D90>

    def run_schema_example_test(organization, standard, name, version, check_func=None):
    
        import asdf
        from asdf.tests import helpers
        from asdf.types import format_tag
        from asdf.resolver import default_resolver
    
        tag = format_tag(organization, standard, version, name)
        schema_path = urllib.parse.urlparse(default_resolver(tag)).path
    
>       with open(schema_path, 'rb') as ff:
E       OSError: [Errno 22] Invalid argument: '/C:/Users/PL/Miniconda3/envs/py37/lib/site-packages/asdf/schemas/stsci.edu/asdf/core/table-1.0.0.yaml'

..\Miniconda3\envs\py37\lib\site-packages\astropy\io\misc\asdf\tags\tests\helpers.py:21: OSError

[nden]

I think the problem is in asdf.uitl.filepath_to_url. If that’s the case asdf tests should fail on Windows too. I’m not sure when we stopped testing asdf on Win but we should start that job. Since filepath_to_url is only used in testing I suggest astropy xfails those tests on Win until this is fixed in asdf.

[jdavies-st]

The asdf package CI tests do run on Windows. If you look at the Travis CI results, the last couple tests in the tox env do it on Windows. But clearly this test case is not covered. I tried covering it here

https://github.com/spacetelescope/asdf/pull/680

but that seems to not have covered the same case. Hmm.