id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
589583977,MDU6SXNzdWU1ODk1ODM5Nzc=,3908,"check index invariants in test_dataset, test_dataarray",2448579,closed,0,,,5,2020-03-28T14:07:17Z,2020-10-13T04:03:58Z,2020-10-13T04:03:58Z,MEMBER,,,,"There are a large number of tests in `test_dataarray.py` and `test_dataset.py` that use the `assert actual.equals(expected)` pattern. 

We should switch these to be `assert_equal(actual, expected)` so that we run the invariant checks:

https://github.com/pydata/xarray/blob/acf7d4157ca44f05c85a92d1b914b68738988773/xarray/tests/__init__.py#L150-L154

Seems like an easy use of regexes for someone that knows them (i.e. not me ;))","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3908/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue