Split attrs - tests for status quo #4960

pp-mo · 2022-09-12T14:19:34Z

Addresses #4981

Just the addtitional tests which "snapshot" the existing behaviour

In principle should address "all" behaviour that we want to capture + preserve,
but in practice we may miss something here + add more later.
What these tests definitely should do is pass if run against the pre-existing main branch code.

pp-mo · 2022-09-15T17:32:05Z

Rebased + targetting new feature-branch "FEATURE_split_attrs"

pp-mo · 2022-09-15T17:45:09Z

UPDATE: I have since converted the rough plan outlined in this comment into tickets on a new project to cover all of this work

Note :
a rough plan for the future development path...

initial tests for status-quo
- now basically done, though more may still be needed / to be added later
cube metadata changes
- the cube state will contain separate 'local' + 'global' attribute dicts
cube attributes handler
- "cube.attributes" to become a wrapper object, providing access ~same as existing (combined local+global),
  plus specific local + global settings. (Have code for this prototyped already)
netcdf loader changes
- specifically, assign incoming attributes into relevant local+global areas when loading netcdf
- NOTE: the 'combined access' means that, at this point, saving to netcdf will have almost-same results.
netcdf saver changes
- changes to respect the local/global designations on saving (e.g. from original load provenance), where possible
- PLUS: a FUTURE flag implementation to switch new/old handling behaviour
?? cube printout ??
- COULD modify this to have an extra section.
- i.e. "Attributes:" (local) and separate "Global Attributes:"
- not yet clear if this is required / a good idea
  - NB existing listing is presented in alphabetical order
  - so this is going to change A LOT of test results
adjust "equalise_attributes"
- at least ensure that operation makes sense with the new split-form attributes
- needs to handle newly-possible collisions between matching local+global settings
- possibly provide automatic resolution of some such problems
- possibly add extra keywords to control different resolution modes
UserGuide update

other questions ...

? special additional logic in common-metadata / lenient logic, allowing combine+compare of local+global settings ??
? POSSIBLY ? more fixes / rationalisation of existing code
- adjust LimitedAttributeDict to conform to _CF_ATTRS
- modify LimitedAttributeDict to complain about mis-assignment of recognised global-only or local-only attributes
  - NOTE: this probably can't / shouldn't occur in the CubeAttributesMap
    - "should" instead occur within the individual (specific) sets
- worry about handling of "missing_value" attribute : suspect there may be an anomaly here
- rationalise attribute handling : separate logic to separate code, apart from netcdf-save ??

pp-mo · 2022-09-23T15:32:33Z

I've now created a project for this entire effort, and re-targetted this PR onto a dedicated feature branch.

So this PR is now represents only the very first step of that (#4981), and should be evaluated, fixed and merged as it is.

Please review for sense, and completeness of the testing scope

pp-mo · 2022-09-28T17:01:36Z

NOTE: rebased onto updated feature-branch + fixed, following the mergeback which contained #4803

lbdreyer

This is great improvement, adding a lot of missing testing! Funnily enough, a lot of the comments I wanted to make were issues with the current behaviour brought to light by these new tests! But as this PR is aimed at testing the current behaviour, I have made myself notes of these comments so that we address them later on.

I think most of what is here is looking really good. I suppose my biggest cause for concern is that you test roundtripping (load+save) so we miss whether the behaviors is occurring on load or save (see this comment, in particular). That being said I don't have enough oversight of the split_attr project to know whether this will matter?

lib/iris/tests/integration/test_netcdf.py

noxfile.py

lib/iris/tests/integration/test_netcdf.py

pp-mo · 2022-10-26T11:24:12Z

@lbdreyer I hope recent commits should cover a lot of your outstanding comments.
But a couple of things are clearly still outstanding

whether I should be testing load- and save behaviours independently of a round-trip approach
- I suspect you may be right, but changes from this code would be quite involved, so perhaps we should consider it as a separate follow-on.
  I'm still thinking on this one.
how to fix the parallel tests
- I have no idea what the problem here is, or why it only seems to occur with Python 3.10, which feels to me like a PyTest problem.
  I will un-fix this + see what happens now. I could also try a rebase to bring in newer dependencies, but AFAICT there is nothing much in the latest iris/main lockfiles that seems like it is going to affect this.

pp-mo · 2022-10-26T13:29:37Z

lib/iris/tests/integration/test_netcdf.py

+        )
+        self.check_expected_results(
+            global_attr_value="single-value",  # local values eclipse the global ones
+            # N.B. the output var has NO such attribute


TODO: from the comment, I think this is missing a var_attr_vals={"myvar": None}

pp-mo · 2022-10-27T14:57:35Z

Updates ...

@lbdreyer ... a couple of things are clearly still outstanding

* whether I should be [testing load- and save behaviours independently of a round-trip approach](https://github.com/SciTools/iris/pull/4960#discussion_r987733199)

I am working on this.
I intend to add some specific load- and save-behaviour tests, probably in addition to the round-trips,
but still working out what.

* how to [fix the parallel tests](https://github.com/SciTools/iris/pull/4960#discussion_r987285790)

Well, you'll see that I came up with a workaround, but it's really rather horrible !
As we're working on a feature-branch here, I'd rather pause on a better solution for this, and just move forwards noting the problem ?

pp-mo · 2023-02-13T17:58:11Z

Rebased.

I have now added specific, independent tests for load and save behaviour (file->cubes, cubes->file).
These tests should persist in future by matching (almost all) uses of the "combined" cube.attributes value.
And I think ~all results will match, up to but not including the ordering of the dictionary keys.

In future, I hope I can use all the same testcases to check the new cube.attributes.global and cube.attributes.local content in each case.

pp-mo · 2023-02-13T18:00:10Z

@lbdreyer I think I have now addressed everything outstanding -- can you re-review ?
I will then go on to get #5040 rebased onto this

pp-mo · 2023-02-14T17:23:09Z

Note: when #5095 is merged, that splits tests/integration/test_netcdf.py into various tests/integration/netcdf/test_xxx.py.
So we will want to rebase or merge that in here.
(Mergeback into the feature-branch would be OK I think)

lbdreyer

Just a few small changes but otherwise I would say this is close to be merged!

I see a bunch of changes from main have also got mixed in with this PR. Is that intentional? It may be easier to update the feature branch in another PR

lib/iris/tests/integration/test_netcdf__loadsaveattrs.py

…ument names.

…Load and Roundtrip tests.

pp-mo · 2023-02-20T14:42:06Z

I have now merged-forward latest main into the F-B, and rebased this onto that.
So the history here is now much cleaner.
This will also affect other open PRs, I think at present only #4983

pp-mo · 2023-02-20T15:38:41Z

Thanks @lbdreyer I hope recent commits (post-rebase) address all your latest points.
The previous notes are also not resolved -- could you please check those over and re-raise anything from there that still seems unfinished ?
Otherwise, I hope is all done 🤞

lbdreyer

Looks all good now! Thanks @pp-mo !

pp-mo · 2023-02-20T16:03:31Z

Great, thanks so much for your patience @lbdreyer !

* Split-attrs: Cube metadata refactortests (#4993) * Convert Test___eq__ to pytest. * Convert Test_combine to pytest. * Convert Test_difference to pytest. * Review changes. * Split attrs - tests for status quo (#4960) * Tests for attribute handling in netcdf load/save. * Tidy test functions. * Fix import order exception. * Add cf-global attributes test. * Towards more pytest-y implemenation. * Replace 'create_testcase' with fixture which also handles temporary directory. * Much tidy; use fixtures to parametrise over multiple attributes. * Fix warnings; begin data-style attrs tests. * Tests for data-style attributes. * Simplify setup fixture + improve docstring. * No parallel test runner, to avoid error for Python>3.8. * Fixed for new-style netcdf module. * Small review changes. * Rename attributes set 'data-style' as 'local-style'. * Simplify use of fixtures; clarify docstrings/comments and improve argument names. * Clarify testing sections for different attribute 'styles'. * Re-enable parallel testing. * Sorted params to avoid parallel testing bug - pytest#432. * Rename test functions to make alpha-order match order in class. * Split netcdf load/save attribute testing into separate sourcefile. * Add tests for loaded cube attributes; refactor to share code between Load and Roundtrip tests. * Add tests for attribute saving. * Fix method names in comments. * Clarify source of Conventions attributes. * Explain the test numbering in TestRoundtrip/TestLoad. * Remove obsolete test helper method. * Fix small typo; Fix numbering of testcases in TestSave. * Implement split cube attributes. (#5040) * Implement split cube attributes. * Test fixes. * Modify examples for simpler metadata printouts. * Added tests, small behaviour fixes. * Simplify copy. * Fix doctests. * Skip doctests with non-replicable outputs (from use of sets). * Tidy test comments, and add extra test. * Tiny typo. * Remove redundant redefinition of Cube.attributes. * Add CubeAttrsDict in module __all__ + improve docs coverage. * Review changes - small test changes. * More review changes. * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Fix CubeAttrsDict example docstrings. * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Odd small fixes. * Improved docstrings and comments; fix doctests. * Don't sidestep netcdf4 thread-safety. * Publicise LimitedAttributeDict, so CubeAttrsDict can refer to it. * Fix various internal + external links. * Update lib/iris/cube.py Co-authored-by: Martin Yeo <[email protected]> * Update lib/iris/cube.py Co-authored-by: Martin Yeo <[email protected]> * Update lib/iris/cube.py Co-authored-by: Martin Yeo <[email protected]> * Update lib/iris/cube.py Co-authored-by: Martin Yeo <[email protected]> * Streamline docs. * Review changes. --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Martin Yeo <[email protected]> * Splitattrs ncload (#5384) * Distinguish local+global attributes in netcdf loads. * Small test fixes. * Small doctest fix. * Fix attribute load-save tests for new behaviour, and old-behaviour equivalence. * Split attrs docs (#5418) * Clarification in CubeAttrsDict examples. * CubeAttrsDict fix docstring typo. * Raise awareness of split attributes in user guide. * What's New entry. * Changes to metadata documentation. * Splitattrs ncsave redo (#5410) * Add docs and future switch, no function yet. * Typing enables code completion for Cube.attributes. * Make roundtrip checking more precise + improve some tests accordingly (cf. #5403). * Rework all tests to use common setup + results-checking code. * Saver supports split-attributes saving (no tests yet). * Tiny docs fix. * Explain test routines better. * Fix init of FUTURE object. * Remove spurious re-test of FUTURE.save_split_attrs. * Don't create Cube attrs of 'None' (n.b. but no effect as currently used). * Remove/repair refs to obsolete routines. * Check all warnings from save operations. * Remove TestSave test numbers. * More save cases: no match with missing, and different cube attribute types. * Run save/roundtrip tests both with+without split saves. * Fix. * Review changes. * Fix changed warning messages. * Move warnings checking from 'run' to 'check' phase. * Simplify and improve warnings checking code. * Fix wrong testcase. * Minor review changes. * Fix reverted code. * Use sets to simplify demoted-attributes code. * WIP * Working with iris 3.6.1, no errors TestSave or TestRoundtrip. * Interim save (incomplete?). * Different results form for split tests; working for roundtrip. * Check that all param lists are sorted. * Check matrix result-files compatibility; add test_save_matrix. * test_load_matrix added; two types of load result. * Finalise special-case attributes. * Small docs tweaks. * Add some more testcases, * Ensure valid sort-order for globals of possibly different types. * Initialise matrix results with legacy values from v3.6.1 -- all matching. * Add full current matrix results, i.e. snapshot current behaviours. * Review changes : rename some matrix testcases, for clarity. * Splitattrs ncsave redo commonmeta (#5538) * Define common-metadata operartions on split attribute dictionaries. * Tests for split-attributes handling in CubeMetadata operations. * Small tidy and clarify. * Common metadata ops support mixed split/unsplit attribute dicts. * Clarify with better naming, comments, docstrings. * Remove split-attrs handling to own sourcefile, and implement as a decorator. * Remove redundant tests duplicated by matrix testcases. * Newstyle split-attrs matrix testing, with fewer testcases. * Small improvements to comments + docstrings. * Fix logic for equals expectation; expand primary/secondary independence test. * Clarify result testing in metadata operations decorator. * Splitattrs equalise (#5586) * Add tests in advance for split-attributes handling cases. * Move dict conversion inside utility, for use elsewhere. * Add support for split-attributes to equalise_attributes. * Update lib/iris/util.py Co-authored-by: Martin Yeo <[email protected]> * Update lib/iris/tests/unit/util/test_equalise_attributes.py Co-authored-by: Martin Yeo <[email protected]> * Simplify and clarify equalise_attributes code. --------- Co-authored-by: Martin Yeo <[email protected]> * Fix merge-fail messaging for attribute mismatches. (#5590) * Extra CubeAttrsDict methods to emulate dictionary behaviours. (#5592) * Extra CubeAttrsDict methods to emulate dictionary behaviours. * Don't use staticmethod on fixture. * Add Iris warning categories to saver warnings. * Type equality fixes for new flake8. * Licence header fixes. * Splitattrs ncsave deprecation (#5595) * Small improvement to split-attrs whatsnew. * Emit deprecation warning when saving without split-attrs enabled. * Stop legacy-split-attribute warnings from upsetting delayed-saving tests. --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Martin Yeo <[email protected]>

pp-mo force-pushed the split_attrs branch 3 times, most recently from 64db552 to f67e549 Compare September 15, 2022 17:31

pp-mo changed the base branch from main to FEATURE_split_attrs September 15, 2022 17:31

pp-mo changed the title ~~Split attrs~~ Split attrs - tests for status quo Sep 23, 2022

pp-mo marked this pull request as ready for review September 23, 2022 11:05

pp-mo linked an issue Sep 23, 2022 that may be closed by this pull request

split-attrs: tests for status-quo #4981

Closed

pp-mo added the Type: Feature Branch Highlight this for a feature branch label Sep 26, 2022

pp-mo mentioned this pull request Sep 26, 2022

Split-attrs: Cube metadata refactortests #4993

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pp-mo force-pushed the split_attrs branch from f67e549 to e39e7c0 Compare September 28, 2022 16:58

lbdreyer requested changes Oct 5, 2022

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pp-mo force-pushed the split_attrs branch from 17962bf to 2c95111 Compare October 25, 2022 16:49

pp-mo commented Oct 26, 2022

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pp-mo mentioned this pull request Oct 26, 2022

Different tests were collected between gw0 and gw1 pytest-dev/pytest-xdist#432

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pp-mo mentioned this pull request Nov 4, 2022

Splitattrs ncload #5048

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pp-mo force-pushed the split_attrs branch from bab6a2f to 5615958 Compare February 13, 2023 13:55

pp-mo mentioned this pull request Feb 13, 2023

Split attrs rebased #5155

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pp-mo force-pushed the split_attrs branch 2 times, most recently from 207dbce to d3b55ed Compare February 13, 2023 17:40

lbdreyer requested changes Feb 19, 2023

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trexfeathers assigned pp-mo Feb 20, 2023

pp-mo added 14 commits February 20, 2023 14:35

Tests for data-style attributes.

4ad1508

Simplify setup fixture + improve docstring.

99ea431

No parallel test runner, to avoid error for Python>3.8.

e6b79e4

Fixed for new-style netcdf module.

6022e33

Small review changes.

25d2ebb

Rename attributes set 'data-style' as 'local-style'.

9c5bb34

Simplify use of fixtures; clarify docstrings/comments and improve arg…

2cd824f

…ument names.

Clarify testing sections for different attribute 'styles'.

56642be

Re-enable parallel testing.

3389852

Sorted params to avoid parallel testing bug - pytest#432.

481459c

Rename test functions to make alpha-order match order in class.

9999140

Split netcdf load/save attribute testing into separate sourcefile.

047e5ef

Add tests for loaded cube attributes; refactor to share code between …

92784a0

…Load and Roundtrip tests.

Add tests for attribute saving.

b829df9

pp-mo force-pushed the split_attrs branch from d3b55ed to b829df9 Compare February 20, 2023 14:37

pp-mo added 5 commits February 20, 2023 15:06

Fix method names in comments.

ecb3b6f

Clarify source of Conventions attributes.

15eadcc

Explain the test numbering in TestRoundtrip/TestLoad.

67c817b

Remove obsolete test helper method.

dac7c3e

Fix small typo; Fix numbering of testcases in TestSave.

e416ee4

lbdreyer approved these changes Feb 20, 2023

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lbdreyer merged commit f485f8a into SciTools:FEATURE_split_attrs Feb 20, 2023

pp-mo mentioned this pull request Feb 20, 2023

Splitattrs cubeattrs rebased #5166

Closed

pp-mo mentioned this pull request Jul 20, 2023

Splitattrs ncload #5384

Merged

pp-mo mentioned this pull request Nov 15, 2023

split-attrs: improve the xdist error fix #5037

Closed

pp-mo deleted the split_attrs branch November 29, 2025 11:35

Split attrs - tests for status quo #4960

Split attrs - tests for status quo #4960

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