Searching for best practice how to test File size on input type="file" change event. Right now my test spec looks like this: it('attach file with too large size', () => { const file: File = { name: 'filename', type: 'image/png', size: 8242880, lastModified: 1, lastModifiedDate: new Date(), webkitRelativePath: '', msClose: () => {}, msDetachStream: () => {}, slice: (): Blob => null, }; const event = { target: { files: [file] } }; component.onFileChange(event); // file validation happens into it too const error = control.getError('file_size'); expect(error).toBeTruthy(); }); Is there better way how to set File size property with TypeScript? When I am trying to setting size property directly to File object, it's not allowed because size property is read-only. const file = new File([''], 'filename', { type: 'image/png' }); file.size = 8242880; // TS error Current way how I am mocking File object where I need to define all File object properties for me isn't looking very beautiful, but can't find any better way. Any ideas? Continue reading...
