text: import BoxParser from '../../src/streaming/utils/BoxParser';
  
  const expect = require('chai').expect;
  
  const context = {};
  const boxParser = BoxParser(context).getInstance();
  
  const ftypCompleted = [0x00, 0x00, 0x00, 0x14, 0x66, 0x74, 0x79, 0x70, 0x69, 0x73, 0x6f, 0x6d, 0x00, 0x00, 0x00, 0x01, 0x69, 0x73, 0x6f, 0x6d];
  const ftypIncompleted = [0x00, 0x00, 0x00, 0x14, 0x66, 0x74, 0x79, 0x70, 0x69, 0x73, 0x6f, 0x6d, 0x00, 0x00, 0x00, 0x01, 0x69, 0x73, 0x6f];
  
  const initSegmentCompleted = [
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      0x35, 0x36, 0x2e, 0x34, 0x30, 0x2e, 0x31, 0x30, 0x31];
  
  const initSegmentIncompleted = [
      0x00, 0x00, 0x00, 0x1c, 0x66, 0x74, 0x79, 0x70, 0x69, 0x73, 0x6f, 0x35, 0x00, 0x00, 0x00, 0x01, 0x61, 0x76, 0x63, 0x31, 0x69, 0x73, 0x6f, 0x35,
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  describe('BoxParser', function () {
      describe('when no data is provided', () => {
          it('should return false when data is null or not defined', () => {
              const res = boxParser.findLastTopIsoBoxCompleted(['ftyp'], null);
  
              expect(res.found).to.be.false;    // jshint ignore:line
          });
  
          it('should return false when data is empty', () => {
              const data = new ArrayBuffer();
              const res = boxParser.findLastTopIsoBoxCompleted(['ftyp'], data);
  
              expect(res.found).to.be.false;    // jshint ignore:line
          });
  
          it('should return false when data length is lower than offset', () => {
              const data = new ArrayBuffer(5);
              const res = boxParser.findLastTopIsoBoxCompleted(['ftyp'], data, 10);
  
              expect(res.found).to.be.false;  // jshint ignore:line
          });
  
          it('should return false when data to read is lower than 8', () => {
              const data = new ArrayBuffer(16);
              const res = boxParser.findLastTopIsoBoxCompleted(['ftyp'], data, 12);
  
              expect(res.found).to.be.false; // jshint ignore:line
          });
      });
  
      describe('when data is provided', () => {
          it('should return true when looking for a box that is completed', () => {
              const data = new Uint8Array(ftypCompleted);
              const res = boxParser.findLastTopIsoBoxCompleted(['ftyp'], data.buffer);
  
              expect(res.found).to.be.true; // jshint ignore:line
          });
  
          it('should return false when looking for a box that is not completed', () => {
              const data = new Uint8Array(ftypIncompleted);
              const res = boxParser.findLastTopIsoBoxCompleted(['ftyp'], data.buffer);
  
              expect(res.found).to.be.false; // jshint ignore:line
          });
  
          it('should return true when looking for completed boxes in a buffer with multiple top boxes', () => {
              const data = new Uint8Array(initSegmentCompleted);
              let res = boxParser.findLastTopIsoBoxCompleted(['ftyp'], data.buffer);
              expect(res.found).to.be.true; // jshint ignore:line
  
              res = boxParser.findLastTopIsoBoxCompleted(['moov'], data.buffer);
              expect(res.found).to.be.true; // jshint ignore:line
          });
  
          it('should return true when looking for completed boxes and using offset values', () => {
              const data = new Uint8Array(initSegmentCompleted);
  
              const res = boxParser.findLastTopIsoBoxCompleted(['ftyp', 'moov'], data.buffer, 132);
              expect(res.found).to.be.true; // jshint ignore:line
          });
  
          it('should return offset of the last completed box when the specified box type is not found', () => {
              const data = new Uint8Array(initSegmentIncompleted);
  
              const res = boxParser.findLastTopIsoBoxCompleted(['moov'], data.buffer);
              expect(res.found).to.be.false; // jshint ignore:line
              expect(res.lastCompletedOffset).to.equal(36); // jshint ignore:line
          });
      });
  });