[Flaky test] `commonlib-unit / xmodule.xmodule.modulestore.tests.test_assetstore::TestMongoAssetMetadataStorage::test_get_all_assets_with_paging`

This test fails intermittently and has been deleted according to the Flaky Test Process in https://github.com/openedx/edx-platform/pull/28037. (PR has some proposed fixes/alternatives.)

See docs on how to address flaky tests for why this should be fixed and how to go about it.

Builds where it failed, then passed on the same PR:

• https://build.testeng.edx.org/job/edx-platform-python-pipeline-pr/32033/testReport/junit/xmodule.xmodule.modulestore.tests.test_assetstore/TestMongoAssetMetadataStorage/Run_Tests___commonlib_unit___test_get_all_assets_with_paging_1/
• https://build.testeng.edx.org/job/edx-platform-python-pipeline-pr/32017/testReport/junit/xmodule.xmodule.modulestore.tests.test_assetstore/TestMongoAssetMetadataStorage/Run_Tests___commonlib_unit___test_get_all_assets_with_paging_2/

Failure output (for the two values of MODULESTORE_SETUPS):

Regression
Run Tests / commonlib-unit / xmodule.xmodule.modulestore.tests.test_assetstore.TestMongoAssetMetadataStorage.test_get_all_assets_with_paging_1 (from pytest)

Failing for the past 1 build (Since Failed#32033 )
Took 0.5 sec.
Error Message
AssertionError: assert 'demo.swf' == 'weather_patterns.bmp'
  - weather_patterns.bmp
  + demo.swf
Stacktrace
self = <xmodule.modulestore.tests.test_assetstore.TestMongoAssetMetadataStorage testMethod=test_get_all_assets_with_paging_1>
storebuilder = MongoModulestoreBuilder()

    @ddt.data(*MODULESTORE_SETUPS)
    def test_get_all_assets_with_paging(self, storebuilder):
        """
        Save multiple metadata in each store and retrieve it singularly, as all assets, and after deleting all.
        """
        with storebuilder.build() as (__, store):
            course1 = CourseFactory.create(modulestore=store)
            course2 = CourseFactory.create(modulestore=store)
            self.setup_assets(course1.id, course2.id, store)
    
            expected_sorts_by_2 = (
                (
                    ('displayname', ModuleStoreEnum.SortOrder.ascending),
                    ('code.tgz', 'demo.swf', 'dog.png', 'roman_history.pdf', 'weather_patterns.bmp'),
                    (2, 2, 1)
                ),
                (
                    ('displayname', ModuleStoreEnum.SortOrder.descending),
                    ('weather_patterns.bmp', 'roman_history.pdf', 'dog.png', 'demo.swf', 'code.tgz'),
                    (2, 2, 1)
                ),
                (
                    ('uploadDate', ModuleStoreEnum.SortOrder.ascending),
                    ('code.tgz', 'dog.png', 'roman_history.pdf', 'weather_patterns.bmp', 'demo.swf'),
                    (2, 2, 1)
                ),
                (
                    ('uploadDate', ModuleStoreEnum.SortOrder.descending),
                    ('demo.swf', 'weather_patterns.bmp', 'roman_history.pdf', 'dog.png', 'code.tgz'),
                    (2, 2, 1)
                ),
            )
            # First, with paging across all sorts.
            for sort_test in expected_sorts_by_2:
                for i in range(3):
                    asset_page = store.get_all_asset_metadata(
                        course2.id, 'asset', start=2 * i, maxresults=2, sort=sort_test[0]
                    )
                    num_expected_results = sort_test[2][i]
                    expected_filename = sort_test[1][2 * i]
                    assert len(asset_page) == num_expected_results
                    assert asset_page[0].asset_id.path == expected_filename
                    if num_expected_results == 2:
                        expected_filename = sort_test[1][(2 * i) + 1]
>                       assert asset_page[1].asset_id.path == expected_filename
E                       AssertionError: assert 'demo.swf' == 'weather_patterns.bmp'
E                         - weather_patterns.bmp
E                         + demo.swf

common/lib/xmodule/xmodule/modulestore/tests/test_assetstore.py:620: AssertionError

Regression
Run Tests / commonlib-unit / xmodule.xmodule.modulestore.tests.test_assetstore.TestMongoAssetMetadataStorage.test_get_all_assets_with_paging_2 (from pytest)

Failing for the past 1 build (Since Failed#32017 )
Took 0.5 sec.
Error Message
AssertionError: assert 'demo.swf' == 'weather_patterns.bmp'
  - weather_patterns.bmp
  + demo.swf
Stacktrace
self = <xmodule.modulestore.tests.test_assetstore.TestMongoAssetMetadataStorage testMethod=test_get_all_assets_with_paging_2>
storebuilder = MixedModulestoreBuilder([('draft', MongoModulestoreBuilder())], {})

    @ddt.data(*MODULESTORE_SETUPS)
    def test_get_all_assets_with_paging(self, storebuilder):
        """
        Save multiple metadata in each store and retrieve it singularly, as all assets, and after deleting all.
        """
        with storebuilder.build() as (__, store):
            course1 = CourseFactory.create(modulestore=store)
            course2 = CourseFactory.create(modulestore=store)
            self.setup_assets(course1.id, course2.id, store)
    
            expected_sorts_by_2 = (
                (
                    ('displayname', ModuleStoreEnum.SortOrder.ascending),
                    ('code.tgz', 'demo.swf', 'dog.png', 'roman_history.pdf', 'weather_patterns.bmp'),
                    (2, 2, 1)
                ),
                (
                    ('displayname', ModuleStoreEnum.SortOrder.descending),
                    ('weather_patterns.bmp', 'roman_history.pdf', 'dog.png', 'demo.swf', 'code.tgz'),
                    (2, 2, 1)
                ),
                (
                    ('uploadDate', ModuleStoreEnum.SortOrder.ascending),
                    ('code.tgz', 'dog.png', 'roman_history.pdf', 'weather_patterns.bmp', 'demo.swf'),
                    (2, 2, 1)
                ),
                (
                    ('uploadDate', ModuleStoreEnum.SortOrder.descending),
                    ('demo.swf', 'weather_patterns.bmp', 'roman_history.pdf', 'dog.png', 'code.tgz'),
                    (2, 2, 1)
                ),
            )
            # First, with paging across all sorts.
            for sort_test in expected_sorts_by_2:
                for i in range(3):
                    asset_page = store.get_all_asset_metadata(
                        course2.id, 'asset', start=2 * i, maxresults=2, sort=sort_test[0]
                    )
                    num_expected_results = sort_test[2][i]
                    expected_filename = sort_test[1][2 * i]
                    assert len(asset_page) == num_expected_results
                    assert asset_page[0].asset_id.path == expected_filename
                    if num_expected_results == 2:
                        expected_filename = sort_test[1][(2 * i) + 1]
>                       assert asset_page[1].asset_id.path == expected_filename
E                       AssertionError: assert 'demo.swf' == 'weather_patterns.bmp'
E                         - weather_patterns.bmp
E                         + demo.swf

common/lib/xmodule/xmodule/modulestore/tests/test_assetstore.py:620: AssertionError

(Previously filed as https://2u-internal.atlassian.net/browse/CR-3817.)

Start with common/lib/xmodule/xmodule/modulestore/tests/test_assetstore.py and the deleted TestMongoAssetMetadataStorage::test_get_all_assets_with_paging pytest case. Review the linked flaky-test process and PR 28037, then investigate why paged asset ordering intermittently differs for the displayed sort cases. Done means the underlying behavior is addressed and the test passes consistently for both MODULESTORE_SETUPS.