AF-3082: transform static meta fields

[sebastianmalysa-wf]

Proposed solution to https://jira.atl.workiva.net/browse/AF-3082

Ultimate problem:

In anticipation of the Dart 2 transition, all props and state classes will have a static meta getter that is implemented to point to some symbol that needs to be generated, for example:

class FooProps {
  static const PropsMeta meta = $metaForFooProps;
  ...
}

The transformer will need to transform this meta static field inline:

class Foo Props{
  static const PropsMeta meta = $Props(FooProps);

How it was fixed:

• identify static members with the meta variable name and replace the initializer to use the appropriate Props() or State() implementation within the source file .

Testing suggestions:

Code changes and tests make sense
CI passes

---

@corwinsheahan-wf @evanweible-wf @greglittlefield-wf

[aviary-wf]

Security Insights

No security relevant content was detected by automated scans.

Action Items

• Review PR for security impact; comment "security review required" if needed or unsure
• Verify aviary.yaml coverage of security relevant code

---

Questions or Comments? Reach out on HipChat: InfoSec Forum.

[codecov-io]

Codecov Report

Merging #200 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #200      +/-   ##
==========================================
+ Coverage   94.54%   94.57%   +0.03%     
==========================================
  Files          34       34              
  Lines        1648     1657       +9     
==========================================
+ Hits         1558     1567       +9     
  Misses         90       90

[corwinsheahan-wf]

we should also have a test which verifies this functionality on props/state mixins:

test('with static PropsMeta declaration in PropsMixin', () {
  final transformedLine = 'static const PropsMeta meta = \$Props(FooPropsMixin);';
  setUpAndGenerate('''
    @PropsMixin()
    class FooPropsMixin {
      static const PropsMeta meta = \$metaForFooPropsMixin;
    }
    '''
  );
  var transformedSource = transformedFile.getTransformedText();
  expect(transformedSource, contains(transformedLine));
});

[corwinsheahan-wf]

I think it might make sense to also verify that the original meta line is not longer present to ensure that the transformer is replacing and not simply adding a line.

[corwinsheahan-wf]

I think we can combine the StateMeta and PropsMeta tests into 1 test, since any instance of a component will have at least a props class with a meta field.

[corwinsheahan-wf]

Can we skip lines 417-425? I don't think there should ever be an instance where a doNotGenerate() annotation is added to a meta field

[corwinsheahan-wf]

Can we get one more test added that tests this functionality on StateMixins?

[corwinsheahan-wf]

QA +1

• CI Passes
• Added tests cover changes

Merging into master.
@Workiva/release-management-p