TypeError: this._loadImage is not a function

[ybouhjira]

I get this error when trying to use the library, here is the code I run:

const BlinkDiff = require('blink-diff');
const path = require('path');
const {promisify} = require('util');
const chai = require('chai');
const chaiAsPromised = require('chai-as-promised');

chai.should();
chai.use(chaiAsPromised);

const config = require('../../src/config');

function comparer(refImage, testImage, diffPath) {
    const diff = new BlinkDiff({
        imageAPath: refImage, // Use file-path
        imageBPath: testImage,

        thresholdType: BlinkDiff.THRESHOLD_PERCENT,
        threshold: config.tolerance,

        imageOutputPath: diffPath
    });

    return promisify(diff.run)();
}

describe('BlinkDiff comparing module', () => {
    it('should detect visual difference', () => {
        const result = comparer(
            path.join(__dirname, '../image/ref.png'),
            path.join(__dirname, '../image/test.png'),
            path.join(__dirname, '../image/diff.png'),
        );
        result.should.eventually.have.property('mismatchPercentage');
        result.should.eventually.deep.equal({misMatchPercentage: 1});
        result.then(({mismatchPercentage}) => {
            mismatchPercentage.should.be.lessThan(config.tolerance);
        })
    });
});

The error output

"C:\Program Files\nodejs\node.exe" D:\code\new-test\node_modules\mocha\bin\_mocha --ui bdd --reporter "C:\Program Files\JetBrains\WebStorm 2017.2.4\plugins\NodeJS\js\mocha-intellij\lib\mochaIntellijReporter.js" D:\code\new-test\test\lib\blinkdiff-comparer.test.js --grep "BlinkDiff comparing module "
TypeError: this._loadImage is not a function
    at D:\code\new-test\node_modules\blink-diff\index.js:359:16
    at D:\code\new-test\node_modules\promise\lib\es6-extensions.js:18:19
    at flush (D:\code\new-test\node_modules\asap\asap.js:27:13)
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickCallback (internal/process/next_tick.js:181:9)
(node:8644) UnhandledPromiseRejectionWarning: TypeError: this._loadImage is not a function
    at D:\code\new-test\node_modules\blink-diff\index.js:359:16
    at D:\code\new-test\node_modules\promise\lib\es6-extensions.js:18:19
    at flush (D:\code\new-test\node_modules\asap\asap.js:27:13)
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickCallback (internal/process/next_tick.js:181:9)
(node:8644) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:8644) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:8644) UnhandledPromiseRejectionWarning: TypeError: this._loadImage is not a function
    at D:\code\new-test\node_modules\blink-diff\index.js:359:16
    at D:\code\new-test\node_modules\promise\lib\es6-extensions.js:18:19
    at flush (D:\code\new-test\node_modules\asap\asap.js:27:13)
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickCallback (internal/process/next_tick.js:181:9)
(node:8644) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:8644) UnhandledPromiseRejectionWarning: TypeError: this._loadImage is not a function
    at D:\code\new-test\node_modules\blink-diff\index.js:359:16
    at D:\code\new-test\node_modules\promise\lib\es6-extensions.js:18:19
    at flush (D:\code\new-test\node_modules\asap\asap.js:27:13)
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickCallback (internal/process/next_tick.js:181:9)
(node:8644) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 3)

Process finished with exit code 0