ghost-storage-cloudinary-v2/tests/plugins/retinajs/resolveMaxDpr.js

Cloudinary storage adapter for Ghost

'use strict';

const chai = require('chai'),
    expect = chai.expect,
    path = require('path'),
    RetinaJS = require(path.join(__dirname, '../../../plugins')).RetinaJS,
    emptyFunc = function () {
        // Do nothing
    };

describe('resolveMaxDpr', function () {
    it('should return 1 when image width = baseWidth', function (done) {
        const retinajs = new RetinaJS(emptyFunc, { upload: { public_id: 'foo' } }, { baseWidth: 500 }),
            image = path.join(__dirname, '500x250.png');

        expect(retinajs.resolveMaxDpr(image)).to.equal(1);
        done();
    });

    it('should return 1 when image width < baseWidth', function (done) {
        const retinajs = new RetinaJS(emptyFunc, { upload: { public_id: 'foo' } }, { baseWidth: 600 }),
            image = path.join(__dirname, '500x250.png');

        expect(retinajs.resolveMaxDpr(image)).to.equal(1);
        done();
    });

    it('should return 2 when image width = 2 * baseWidth', function (done) {
        const retinajs = new RetinaJS(emptyFunc, { upload: { public_id: 'foo' } }, { baseWidth: 250 }),
            image = path.join(__dirname, '500x250.png');

        expect(retinajs.resolveMaxDpr(image)).to.equal(2);
        done();
    });

    it('should return 2 when image width = 2.5 * baseWidth', function (done) {
        const retinajs = new RetinaJS(emptyFunc, { upload: { public_id: 'foo' } }, { baseWidth: 200 }),
            image = path.join(__dirname, '500x250.png');

        expect(retinajs.resolveMaxDpr(image)).to.equal(2);
        done();
    });

    it('should return 5 when image width = 5 * baseWidth', function (done) {
        const retinajs = new RetinaJS(emptyFunc, { upload: { public_id: 'foo' } }, { baseWidth: 100 }),
            image = path.join(__dirname, '500x250.png');

        expect(retinajs.resolveMaxDpr(image)).to.equal(5);
        done();
    });

    it('should return 5 when image width = 10 * baseWidth', function (done) {
        const retinajs = new RetinaJS(emptyFunc, { upload: { public_id: 'foo' } }, { baseWidth: 50 }),
            image = path.join(__dirname, '500x250.png');

        expect(retinajs.resolveMaxDpr(image)).to.equal(5);
        done();
    });

    it('should throw an error if image is not found', function (done) {
        const retinajs = new RetinaJS(emptyFunc, { upload: { public_id: 'foo' } }, { baseWidth: 50 });

        try {
            retinajs.resolveMaxDpr('./ghost.png');
            done('should raise an error');
        } catch (e) {
            done();
        }
    });
});