Merge pull request #12916 from overleaf/bg-move-stream-buffer-code-to-library

move stream-related code to separate  `@overleaf/stream-utils` library

GitOrigin-RevId: a79a873109b927b4fc0ae36f47d5c67e0df58041

libraries/stream-utils/test/unit/ReadableStringTests.js

@@ -0,0 +1,16 @@
+const { expect } = require('chai')
+const { ReadableString } = require('../../index')
+
+describe('ReadableString', function () {
+  it('should emit the string passed to it', function (done) {
+    const stringStream = new ReadableString('hello world')
+    let data = ''
+    stringStream.on('data', chunk => {
+      data += chunk.toString()
+    })
+    stringStream.on('end', () => {
+      expect(data).to.equal('hello world')
+      done()
+    })
+  })
+})