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							28 lines
						
					
					
						
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							28 lines
						
					
					
						
							677 B
						
					
					
				| 'use strict'; | |
| 
 | |
| const isStream = stream => | |
| 	stream !== null && | |
| 	typeof stream === 'object' && | |
| 	typeof stream.pipe === 'function'; | |
| 
 | |
| isStream.writable = stream => | |
| 	isStream(stream) && | |
| 	stream.writable !== false && | |
| 	typeof stream._write === 'function' && | |
| 	typeof stream._writableState === 'object'; | |
| 
 | |
| isStream.readable = stream => | |
| 	isStream(stream) && | |
| 	stream.readable !== false && | |
| 	typeof stream._read === 'function' && | |
| 	typeof stream._readableState === 'object'; | |
| 
 | |
| isStream.duplex = stream => | |
| 	isStream.writable(stream) && | |
| 	isStream.readable(stream); | |
| 
 | |
| isStream.transform = stream => | |
| 	isStream.duplex(stream) && | |
| 	typeof stream._transform === 'function'; | |
| 
 | |
| module.exports = isStream;
 | |
| 
 |