pattern - stage 1

simple tests with Mocha and Chai

by danbunea1

HTML

<link rel="stylesheet" href="https://s3.amazonaws.com/kiddsoftware-jsfiddle/mocha-1.9.0.css">
<script src="https://s3.amazonaws.com/kiddsoftware-jsfiddle/mocha-1.9.0.js"></script>
<script src="	 https://s3.amazonaws.com/kiddsoftware-jsfiddle/chai-1.5.0.js"></script>
<script src="https://s3.amazonaws.com/kiddsoftware-jsfiddle/chai-jquery.js"></script>
<script src="https://glcdn.githack.com/danbunea/improving-control-flow-in-code-using-functional-pipelines/raw/master/src/commons.js"></script>
<div id="mocha"></div>

CSS

p {
  padding: 0;
  margin: 0;
}

div:nth-child(1)>p {
  color: green;
}

div::nth-child(2)>p {
  color: blue;
}

JavaScript

// Configure Mocha, telling both it and chai to use BDD-style tests. 
mocha.setup("tdd");
var assert = chai.assert;



let repository = {
  "200": {
    "offer-id": 200,
    "percentage": 15
  },
  "400": {
    "offer-id": 400,
    "percentage": 22
  }
};


class IResponseStategy {
  process() {}
}
class ValidationFailedResponse extends IResponseStategy {
  process() {
    return {
      "code": 400,
      "body": {
        "errors": ["The id you provided is invalid"]
      }
    }
  }
}
class NotFoundResponse extends IResponseStategy {
  process() {
    notify("Offer not found: " + this.id);
    return {
      "code": 404,
      "body": {
        "errors": ["The id you provided cannot be found"]
      }
    }
  }
}

class ValidResponse extends IResponseStategy {
  constructor(id) {
    super();
    this.id = id;
  }
  process() {
    return {
      "code": 200,
      "body": repository[this.id]
    }
  }
}

function chooseStategy(id) {
  let strategy = null;
  if (typeof id !== 'string') strategy = new ValidationFailedResponse();
  else if (!repository[id]) strategy = new NotFoundResponse();
  else strategy = new ValidResponse(id);
  return strategy;
}

function getOfferById(requestId) {
  return JSON.stringify(chooseStategy(requestId)
    .process());
}




describe('pattern endpoint should', function() {
  it('return an offer 200', function() {
    assert.equal("{\"code\":200,\"body\":{\"offer-id\":200,\"percentage\":15}}", getOfferById("200"));
  });
  it('return a validation error 400 when not found', function() {
    assert.equal("{\"code\":400,\"body\":{\"errors\":[\"The id you provided is invalid\"]}}", getOfferById(400));
  });
  it('return a not found 404', function() {
    assert.equal("{\"code\":404,\"body\":{\"errors\":[\"The id you provided cannot be found\"]}}", getOfferById("404"));
  });
});
// Run all our test suites.  Only necessary in the browser.
mocha.run();