This time, we'll create and test the collection utility module. Create the CollectionUtils.js file in the ~/snapterest/source/utils/ directory:
function getNumberOfTweetsInCollection(collection) {
var TweetUtils = require('./TweetUtils');
var listOfCollectionTweetIds = TweetUtils.getListOfTweetIds(collection);
return listOfCollectionTweetIds.length;
}
function isEmptyCollection(collection) {
return (getNumberOfTweetsInCollection(collection) === 0);
}
module.exports = {
getNumberOfTweetsInCollection: getNumberOfTweetsInCollection,
isEmptyCollection: isEmptyCollection
};The CollectionUtils module has two methods: getNumberOfTweetsInCollection() and isEmptyCollection().
First, let's discuss getNumberOfTweetsInCollection():
function getNumberOfTweetsInCollection(collection) {
var TweetUtils = require('./TweetUtils');
var listOfCollectionTweetIds = TweetUtils.getListOfTweetIds(collection);
return listOfCollectionTweetIds.length;
}As...