114 lines
2.3 KiB
Markdown
114 lines
2.3 KiB
Markdown
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@license Apache-2.0
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Copyright (c) 2018 The Stdlib Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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# Duplex Stream-like
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> Test if a value is Node [duplex stream][nodejs-stream]-like.
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<section class="usage">
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## Usage
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```javascript
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var isNodeDuplexStreamLike = require( '@stdlib/assert/is-node-duplex-stream-like' );
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```
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#### isNodeDuplexStreamLike( value )
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Tests if a `value` is Node [duplex stream][nodejs-stream]-like.
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```javascript
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var transformStream = require( '@stdlib/streams/node/transform' );
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var bool = isNodeDuplexStreamLike( transformStream() );
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// returns true
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```
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</section>
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<!-- /.usage -->
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<section class="notes">
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</section>
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<!-- /.notes -->
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<section class="examples">
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## Examples
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<!-- eslint no-undef: "error" -->
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```javascript
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var stream = require( 'stream' );
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var transformStream = require( '@stdlib/streams/node/transform' );
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var isNodeDuplexStreamLike = require( '@stdlib/assert/is-node-duplex-stream-like' );
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var bool = isNodeDuplexStreamLike( new stream.Duplex() );
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// returns true
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bool = isNodeDuplexStreamLike( new stream.Transform() );
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// returns true
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bool = isNodeDuplexStreamLike( transformStream() );
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// returns true
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bool = isNodeDuplexStreamLike( new stream.Writable() );
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// returns false
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bool = isNodeDuplexStreamLike( new stream.Readable() );
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// returns false
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bool = isNodeDuplexStreamLike( new stream.Stream() );
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// returns false
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bool = isNodeDuplexStreamLike( {} );
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// returns false
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bool = isNodeDuplexStreamLike( [] );
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// returns false
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bool = isNodeDuplexStreamLike( null );
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// returns false
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function Stream() {
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return this;
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}
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bool = isNodeDuplexStreamLike( Stream );
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// returns false
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bool = isNodeDuplexStreamLike( new Stream() );
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// returns false
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```
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</section>
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<!-- /.examples -->
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<section class="links">
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[nodejs-stream]: https://nodejs.org/api/stream.html
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</section>
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<!-- /.links -->
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