Resemble.js/nodejs-tests/resemble.test.js

const resemble = require('../resemble');
const fs = require('fs');

describe('resemble', () => {
  test('base64', () => {
    const people_src =
      'data:image/jpeg;base64,' +
      fs.readFileSync('./demoassets/People.jpg', 'base64');
    const people2_src =
      'data:image/jpeg;base64,' +
      fs.readFileSync('./demoassets/People2.jpg', 'base64');

    return new Promise(function(resolve, reject) {
      resemble(people_src).compareTo(people2_src).onComplete(function(data) {
        // console.info('Reached oncomplete for base64_string');
        expect(data.diffBounds.bottom).toEqual(431);
        expect(data.diffBounds.left).toEqual(22);
        expect(data.diffBounds.right).toEqual(450);
        expect(data.diffBounds.top).toEqual(58);
        expect(data.dimensionDifference.height).toEqual(0);
        expect(data.dimensionDifference.width).toEqual(0);
        expect(data.isSameDimensions).toBe(true);
        expect(data.misMatchPercentage).toEqual('8.66');
        resolve();
      });
    });
  });

  // this doesn't work on windows

  // test('files', () => {
  //   return new Promise(function(resolve, reject) {
  //       console.log('hello there how are you');
  //     resemble('demoassets/People.jpg')
  //       .compareTo('demoassets/People2.jpg')
  //       .onComplete(function(data) {
  //         // console.info('Reached oncomplete for request_success');
  //         expect(data.diffBounds).toEqual(
  //           expect.objectContaining({
  //             bottom: expect.any(Number),
  //             left: expect.any(Number),
  //             top: expect.any(Number),
  //             right: expect.any(Number)
  //           })
  //         );
  //
  //         expect(data.diffBounds.bottom).toEqual(431);
  //         expect(data.diffBounds.left).toEqual(22);
  //         expect(data.diffBounds.right).toEqual(450);
  //         expect(data.diffBounds.top).toEqual(58);
  //         expect(data.dimensionDifference.height).toEqual(0);
  //         expect(data.dimensionDifference.width).toEqual(0);
  //         expect(data.isSameDimensions).toBe(true);
  //         expect(data.misMatchPercentage).toEqual('8.66');
  //         resolve();
  //       });
  //   });
  // });

  test('file not found', () => {
    return new Promise(function(resolve, reject) {
      resemble('../demoassets/People.jpg')
        .compareTo('../demoassets/404-image.jpg')
        .onComplete(function(data) {
          // console.info('Reached oncomplete for request_404');
          // console.log(data);
          expect(data.error).toEqual('Error: error while reading from input stream');
          resolve();
        });
    });
  });

  test('node buffers jpg', () => {
    const people = fs.readFileSync('./demoassets/People.jpg');
    const people2 = fs.readFileSync('./demoassets/People2.jpg');

    return new Promise(function(resolve, reject) {
      resemble(people).compareTo(people2).onComplete(function(data) {
        // console.info('Reached oncomplete for base64_string');
        expect(data.diffBounds.bottom).toEqual(431);
        expect(data.diffBounds.left).toEqual(22);
        expect(data.diffBounds.right).toEqual(450);
        expect(data.diffBounds.top).toEqual(58);
        expect(data.dimensionDifference.height).toEqual(0);
        expect(data.dimensionDifference.width).toEqual(0);
        expect(data.isSameDimensions).toBe(true);
        expect(data.misMatchPercentage).toEqual('8.66');
        resolve();
      });
    });
  });


  test('node buffers png', () => {
      const people = fs.readFileSync('./demoassets/ghost1.png');
      const people2 = fs.readFileSync('./demoassets/ghost2.png');

      return new Promise(function(resolve, reject) {
          resemble(people).compareTo(people2).onComplete(function(data) {
              // console.info('Reached oncomplete for base64_string');
              expect(data.diffBounds.bottom).toEqual(138);
              expect(data.diffBounds.left).toEqual(90);
              expect(data.diffBounds.right).toEqual(157);
              expect(data.diffBounds.top).toEqual(107);
              expect(data.dimensionDifference.height).toEqual(0);
              expect(data.dimensionDifference.width).toEqual(0);
              expect(data.isSameDimensions).toBe(true);
              expect(data.misMatchPercentage).toEqual('0.27');
              resolve();
          });
      });
    });


    test('test partial diff with bounding box', () => {
        const people = fs.readFileSync('./demoassets/ghost1.png');
        const people2 = fs.readFileSync('./demoassets/ghost2.png');

        return new Promise(function(resolve, reject) {

            resemble.outputSettings({
                boundingBox: {
                    left: 80,
                    top: 80,
                    right: 130,
                    bottom: 130
                }
            });

            resemble(people).compareTo(people2).onComplete(function(data) {
                expect(data.misMatchPercentage).toEqual('0.04');
                resolve();
            });
        });
    });



});