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Avoid problems when required twice #76

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Avoid problems when required twice #76

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7 changes: 7 additions & 0 deletions lib/ref.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,13 @@ var debug = require('debug')('ref')

exports = module.exports = require('bindings')('binding')

if (exports._initialized) {
// Avoid problems when required twice due to test runners like jest
return;
}

exports._initialized = true;

/**
* A `Buffer` that references the C NULL pointer. That is, its memory address
* points to 0. Its `length` is 0 because accessing any data from this buffer
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