forked from zhurui/management
28 lines
588 B
JavaScript
28 lines
588 B
JavaScript
var stream = require('stream')
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function isStream (obj) {
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return obj instanceof stream.Stream
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}
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function isReadable (obj) {
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return isStream(obj) && typeof obj._read == 'function' && typeof obj._readableState == 'object'
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}
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function isWritable (obj) {
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return isStream(obj) && typeof obj._write == 'function' && typeof obj._writableState == 'object'
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}
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function isDuplex (obj) {
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return isReadable(obj) && isWritable(obj)
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}
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module.exports = isStream
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module.exports.isReadable = isReadable
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module.exports.isWritable = isWritable
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module.exports.isDuplex = isDuplex
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