fix: flag not found when using dependency flag in targeting rule

[duyhungtnn]

Part of bucketeer-io/bucketeer#1552

Refers to https://github.com/bucketeer-io/go-server-sdk/pull/157/files

This pull request includes several changes to improve the evaluation process and testing in the project. The most important changes include updating dependencies, refactoring test cases, and enhancing the LocalEvaluator class.

Dependency updates:

• Updated the version of @bucketeer/evaluation from 0.0.1 to 0.0.3 in the package.json file.

Test improvements:

• Refactored imports in src/__tests__/client_assert_get_evaluation_rq.ts to directly import BKTClientImpl from client.

• Added new test cases for protoReasonToReason function in src/__tests__/evaluator/protoReasonToReason.ts.

• Modified multiple test cases in src/__tests__/evaluator/evaluator.ts to use try-catch blocks instead of .catch for error handling. [1] [2] [3] [4] [5]
  Their tests will fail if the expected error is not throw

• Added new test cases for getTargetFeatures, findEvaluation, and getTargetFeatures methods in src/__tests__/evaluator/evaluator.ts.

Enhancements to LocalEvaluator class:

• Modified the findEvaluation method to be public.
• Refactored the getTargetFeatures method to handle prerequisite features more efficiently.
• Added a new private method getPrerequisiteFeaturesFromCache to replace getPrerequisiteFeatures.
• Exported protoReasonToReason function from src/evaluator/local.ts.

[duyhungtnn]

@cre8ivejp please help me to take a look.

[cre8ivejp]

Just confirming, this concat will add the list after the this flag, right?

[duyhungtnn]

yes, its the same with this go code

https://github.com/bucketeer-io/go-server-sdk/blob/master/pkg/bucketeer/evaluator/evaluator.go#L113-L115

But I updated the code for more easy readable using new typescript syntax [...]

  async getTargetFeatures(feature: Feature): Promise<Feature[]> {
    // Check if the flag depends on other flags.
    // If not, we return only the target flag
    const preFlagIDs = getFeatureIDsDependsOn(feature);
    if (preFlagIDs.length === 0) {
      return [feature];
    }
  
    const prerequisiteFeatures = await this.getPrerequisiteFeaturesFromCache(preFlagIDs);
    return [
      feature,
      ...prerequisiteFeatures,
    ];
  }

[cre8ivejp]

Nice. Thank you!