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test-user-interactions-in-js-apps-accurately-with-emulated-events-example-3
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// React | |
// file-upload/common/Upload.js | |
import React from 'react'; | |
class UploadComponent extends React.Component { | |
constructor(props) { | |
super(props); | |
this.state = {fileContent: ''}; | |
this.handleFileInput = this.handleFileInput.bind(this); | |
this.startUpload = this.startUpload.bind(this); | |
} | |
handleFileInput(event) { | |
const reader = new FileReader(); | |
reader.onload = (e) => { | |
this.setState({ fileContent: e.target.result }); | |
document | |
.querySelector('#text-field') | |
.dispatchEvent(new Event('input')) | |
}; | |
reader.readAsText(event.target.files[0]); | |
} | |
startUpload() { | |
document.querySelector(`#file-upload-field`).click(); | |
} | |
render() { | |
return ( | |
<section className="my-file-upload-component"> | |
<h2>{this.props.title}</h2> | |
<p>{this.props.description}</p> | |
<button type="button" onClick={this.startUpload}> | |
Browse file | |
</button> | |
<label htmlFor="text-field">{this.props.label}</label> | |
<textarea | |
id="text-field" | |
data-testid="text-field" | |
value={this.state.fileContent} | |
placeholder="Paste the content of your file here" | |
readOnly | |
/> | |
<input | |
type="file" | |
id="file-upload-field" | |
data-testid="file-upload-field" | |
onChange={this.handleFileInput} | |
/> | |
</section> | |
); | |
} | |
} | |
export default UploadComponent; |
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