DynamoDB code not working inside of Mocha test case? - amazon-dynamodb

Question

Background:
I've created a Dynamo DB table and populated it. I have some code to read an item in a file called readItem.js which works when I run it stand-alone but does NOT work when I run it as a Mocha test case.
Any ideas why the code is not running properly inside of an it() test case?
For standalone, I run the app like this:
node readItem.js
readItem.js:
var AWS = require("aws-sdk");
AWS.config.update({
region: "us-west-2",
endpoint: "http://localhost:8000"
});
var docClient = new AWS.DynamoDB.DocumentClient();
var table = "Movies";
var year = 2015;
var title = "The Big New Movie";
var params = {
TableName: table,
Key:{
"year": year,
"title": title
}
};
docClient.get(params, function(err, data) {
if (err) {
console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
} else {
console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
}
});
However, when I run it inside of a Mocha test case, the callback function on docClient.get() call is not being invoke, i.e.:
docClient.get(params, function(err, data) { ...// Not being invoked });
Here is how I have the code structured as a test case. I invoke the test with:
npm run test
Where "test" is defined in my package.json as:
"scripts": {
"test": "./node_modules/.bin/mocha --recursive --reporter spec --ui bdd test/"
}
Test Case code:
const AWS = require('aws-sdk');
AWS.config.update({
region: "us-west-2",
endpoint: "http://localhost:8000"
});
var docClient = new AWS.DynamoDB.DocumentClient({apiVersion: '2012-08-10'});
let table = "Movies";
let year = 2015;
let title = "The Big New Movie";
let params = {
TableName: table,
Key:{
"year": year,
"title": title
}
};
describe('DynamoDB Tests', function() {
it("Read Item", function() {
try {
docClient.get(params, function (err,data) {
if (err) {
console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
} else {
console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
}
});
} catch (err) {
console.log("ERROR:"+ err);
}
});
});

Answer 1

I was using older version of mocha:
"mocha": "^3.5.3"
Upgrading fixed it
"mocha": "^6.1.4"