useDeepEquality option is not being passed to the generated code

[ben-milanko]

Describe the changes proposed in this Pull Request.

There is an existing bug where the useDeepEquality option is not being passed to the generator.

Based on MakeObservable the default option should be useDeepEquality: true.

After looking at the generated code, this is not being passed through.

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Pull Request Checklist

• If the changes are being made to code, ensure the version in pubspec.yaml is updated.
• Increment the major/minor/patch/patch-count, depending on the complexity of change
• Add the necessary unit tests to ensure the coverage does not drop
• Update the Changelog to include all changes made in this PR, organized by version
• Run the melos run set_version command from the root directory
• Include the necessary reviewers for the PR
• Update the docs if there are any API changes or additions to functionality

[Copilot]

Pull request overview

This PR fixes a bug where the useDeepEquality option from the @observable annotation was not being extracted and passed to the code generator, preventing users from controlling deep equality checks in their observable setters.

Key Changes:

• Extracts the useDeepEquality parameter from @observable annotations in the code generation pipeline
• Adds comprehensive test coverage for useDeepEquality with true, false, and null values
• Updates version from 2.7.4 to 2.7.5

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
mobx_codegen/lib/src/store_class_visitor.dart	Added _getUseDeepEquality() method to extract the useDeepEquality parameter from annotations and pass it to ObservableTemplate
mobx_codegen/test/store_class_visitor_test.dart	Added three test cases to verify useDeepEquality is correctly included in generated code when set to true, false, or null
mobx_codegen/pubspec.yaml	Updated version to 2.7.5 and normalized quote style for dependency version constraints
mobx_codegen/lib/version.dart	Updated version constant to match pubspec.yaml
mobx_codegen/CHANGELOG.md	Documented the bug fix for version 2.7.5

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[amondnet]

Thanks for this fix! The core implementation looks good and follows the existing patterns.

However, there are a couple of issues to address:

1. Rebase needed: The PR appears to be based on an older branch. The pubspec.yaml has SDK >=3.0.0 but current main requires >=3.7.0. Please rebase on the latest main branch.

2. Missing late field support: The useDeepEquality parameter is only added to regular field setters but not to late field setters in observable.dart (line 70). Could you also add it there for completeness?

Let me know if you need any help with these changes!

[ben-milanko]

@amondnet thank you for the feedback. I've made the requested changes. Let me know if you have any more comments.

I've also got a PR I'd like to raise for useDeepEquality functionality on computeds.

[amondnet]

@ben-milanko Could you please fix the failing test? The test data needs to be modified. If it's difficult, please grant me permission to modify the PR.

[ben-milanko]

Hi @amondnet I've merged the latest changes from main, and tried to update the test data to include useDeepEquality, but am running into some formatting issues.

In this example the expected is on the left and the actual on the right. The deep equality was fixed in this example.

The test in question is

    test('generates for a class mixing Store', () async {
      await compareFiles('./data/valid_input.dart', './data/valid_output.dart');
    });

I'm not sure if you might be using a different formatter to me?

I've added you with write permissions on my fork if you would like to take a look.