Dynamically Generated Tests

For a current application, I have a Generator class that is being fed with predefined data. The functionality to create a Generator is stored in the GeneratorMap object, and from there is is possible to build a Generator.

class Generator {
  constructor(_generatorData) {
    this._generatorData = _generatorData;
  }

  // ...
}

let GeneratorMap = {
  _generatorMap: new Map([
    [
      'Generator-01', {
        buildGenerator: function() {
          // ...
        }
      }
    ]
  ]);

  hasGenerator: function(uniqueName) {
    return this._generatorMap.has(uniqueName);
  }

  getGenerator: function(uniqueName) {
    return this._generatorMap.get(uniqueName).buildGenerator();
  }
}

Now when I test the code, first I check whether all the required Generators are defined. Then I run each Generator through a forEach loop and test them. Is that the appropriate way to do so?