# Stream-like > Test if a value is Node [stream][nodejs-stream]-like.
## Usage ```javascript var isNodeStreamLike = require( '@stdlib/assert/is-node-stream-like' ); ``` #### isNodeStreamLike( value ) Tests if a `value` is Node [stream][nodejs-stream]-like. ```javascript var transformStream = require( '@stdlib/streams/node/transform' ); var bool = isNodeStreamLike( transformStream() ); // returns true ```
## Examples ```javascript var stream = require( 'stream' ); var transformStream = require( '@stdlib/streams/node/transform' ); var isNodeStreamLike = require( '@stdlib/assert/is-node-stream-like' ); var bool = isNodeStreamLike( new stream.Stream() ); // returns true bool = isNodeStreamLike( new stream.Readable() ); // returns true bool = isNodeStreamLike( new stream.Writable() ); // returns true bool = isNodeStreamLike( new stream.Duplex() ); // returns true bool = isNodeStreamLike( new stream.Transform() ); // returns true bool = isNodeStreamLike( transformStream() ); // returns true bool = isNodeStreamLike( {} ); // returns false bool = isNodeStreamLike( [] ); // returns false bool = isNodeStreamLike( null ); // returns false function Stream() { return this; } bool = isNodeStreamLike( Stream ); // returns false bool = isNodeStreamLike( new Stream() ); // returns false ```