We're excited that you're interested in joining the Hubrick team. The purpose of this test is to see how you approach problems as well as to evaluate the quality of your code.
The challenge is to create a simple flow engine.
A flow engine is an application that executes a flow consisting of several linked rules, in this case against some incoming data (a JSON string that can be parsed to a JavaScript object literal).
Each rule should contain (at least)
- An ID (unique within the flow, required)
- A rule that will be run against the incoming json data. This is a function that takes a parameter and returns a boolean result. Each function should be called with the same incoming data (the JS object literal)
- An ID of the rule to execute if the function returns true (
true_id) - An ID of the rule to execute if the function returns false (
false_id)
Pass an object (an example of an object and a rule is given below) to the created flow.
The execution will end when a null is provided for the true_id (and the function returns true) or when null is provided for the false_id (and the function returns false).
Additionally, the flow engine (with the provided rule-set) should not be circular.
Please see the mockup below to get a better idea of the flow
- Please don't spend more than 3 hours. We don't expect a production-ready solution.
- Just use pure JavaScript for the flow logic implementation (no underscore and other libraries)
- No UI is required. We recommend to create a JSON file with the list of rules, and an object you will pass to the flow. Results can be out with console.log, bonus points for a colorful console.log for passing, or failing rules!
- Unit tests and bundler/task runner are a plus.
- Code quality
- Correctness
- Technical choices
Please push your code to a GitHub repository (or similar) and let us know when it's ready to for review. We appreciate your time and energy completing the coding exercise and will review your solution as quickly as possible.