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Introduce support for wrapped errors in the codebase #6041

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@3vilhamster 3vilhamster commented May 22, 2024

What changed?
I've switched all direct error handling to usage of either errors.Is or errors.As.
I've split the PR into commits so it can be reviewed commit by commit.
Most of the changes are converting expressions to an identical one so no logical changes are expected:

if _, ok := err.(*customErr); ok {

to

if errors.As(err, new(*customErr)) {

There were a couple of more complicated cases, but all could be resolved.

Why?
This is a mandatory step to improve existing error handling that does not provide a clear path of where the error is coming from. In all style guides, error wrapping is recommended, but the codebase should be ready to handle wrapped errors instead of exact type checks.

How did you test it?
Unit/integration tests.

Potential risks
Potentially, some errors could be misclassified.

Release notes

Documentation Changes

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codecov bot commented May 22, 2024

Codecov Report

Attention: Patch coverage is 57.21925% with 80 lines in your changes are missing coverage. Please review.

Project coverage is 68.14%. Comparing base (f8765f0) to head (91d2e19).

Additional details and impacted files
Files Coverage Δ
client/history/client.go 79.54% <100.00%> (+0.03%) ⬆️
common/archiver/historyIterator.go 81.48% <100.00%> (ø)
common/backoff/retry.go 89.77% <100.00%> (-0.12%) ⬇️
common/domain/handler.go 53.06% <100.00%> (-0.15%) ⬇️
common/dynamicconfig/config.go 93.47% <100.00%> (ø)
...n/dynamicconfig/configstore/config_store_client.go 68.68% <100.00%> (ø)
common/elasticsearch/client/v6/client_bulk.go 91.07% <100.00%> (ø)
common/elasticsearch/client/v7/client_bulk.go 90.82% <100.00%> (ø)
common/persistence/data_manager_interfaces.go 95.48% <100.00%> (-0.03%) ⬇️
common/persistence/nosql/nosql_execution_store.go 73.58% <100.00%> (ø)
... and 44 more

... and 3 files with indirect coverage changes


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@jakobht jakobht left a comment

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There is a lot of places where I think we shoud prefer to use assert.ErrorAs insted of assert.True(t, errors.As.... Commented a few places, but not all

common/types/mapper/proto/errors.go Outdated Show resolved Hide resolved
common/types/mapper/thrift/errors.go Outdated Show resolved Hide resolved
@3vilhamster 3vilhamster force-pushed the wrapper-errors-support branch 4 times, most recently from 35a729e to 91d2e19 Compare May 29, 2024 09:47
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2 participants