filereader.js 2.9 KB

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  1. /**
  2. * @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
  3. * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  4. */
  5. /* globals window */
  6. import FileReader from '../src/filereader';
  7. import testUtils from '@ckeditor/ckeditor5-core/tests/_utils/utils';
  8. import { NativeFileReaderMock, createNativeFileMock } from './_utils/mocks';
  9. describe( 'FileReader', () => {
  10. let reader, fileMock, nativeReaderMock;
  11. testUtils.createSinonSandbox();
  12. beforeEach( () => {
  13. testUtils.sinon.stub( window, 'FileReader' ).callsFake( () => {
  14. nativeReaderMock = new NativeFileReaderMock();
  15. return nativeReaderMock;
  16. } );
  17. fileMock = createNativeFileMock();
  18. reader = new FileReader();
  19. } );
  20. it( 'should initialize loaded property', () => {
  21. expect( reader.loaded ).to.equal( 0 );
  22. } );
  23. it( 'should update loaded property', () => {
  24. nativeReaderMock.mockProgress( 10 );
  25. expect( reader.loaded ).to.equal( 10 );
  26. nativeReaderMock.mockProgress( 20 );
  27. expect( reader.loaded ).to.equal( 20 );
  28. nativeReaderMock.mockProgress( 55 );
  29. expect( reader.loaded ).to.equal( 55 );
  30. } );
  31. describe( 'data', () => {
  32. it( 'should be undefined if file was not loaded', () => {
  33. expect( reader.data ).to.be.undefined;
  34. } );
  35. it( 'should equal to loaded file data', () => {
  36. const promise = reader.read( fileMock )
  37. .then( () => {
  38. expect( reader.data ).to.equal( 'File contents.' );
  39. } );
  40. nativeReaderMock.mockSuccess( 'File contents.' );
  41. return promise;
  42. } );
  43. } );
  44. describe( 'read()', () => {
  45. it( 'should return a promise', () => {
  46. expect( reader.read( fileMock ) ).to.be.instanceOf( Promise );
  47. } );
  48. it( 'should resolve on loading complete', () => {
  49. const promise = reader.read( fileMock )
  50. .then( result => {
  51. expect( result ).to.equal( 'File contents.' );
  52. } );
  53. nativeReaderMock.mockSuccess( 'File contents.' );
  54. return promise;
  55. } );
  56. it( 'should reject on loading error', () => {
  57. const promise = reader.read( fileMock )
  58. .then( () => {
  59. throw new Error( 'Reader should not resolve.' );
  60. }, status => {
  61. expect( status ).to.equal( 'error' );
  62. expect( reader.error ).to.equal( 'Error during file reading.' );
  63. } );
  64. nativeReaderMock.mockError( 'Error during file reading.' );
  65. return promise;
  66. } );
  67. it( 'should reject promise on loading abort', () => {
  68. const promise = reader.read( fileMock )
  69. .then( () => {
  70. throw new Error( 'Reader should not resolve.' );
  71. }, status => {
  72. expect( status ).to.equal( 'aborted' );
  73. } );
  74. nativeReaderMock.abort();
  75. return promise;
  76. } );
  77. } );
  78. describe( 'abort()', () => {
  79. it( 'should allow to abort reading', () => {
  80. const promise = reader.read( fileMock )
  81. .then( () => {
  82. throw new Error( 'Reader should not resolve.' );
  83. }, status => {
  84. expect( status ).to.equal( 'aborted' );
  85. } );
  86. reader.abort();
  87. return promise;
  88. } );
  89. } );
  90. } );