Avoid duplicating a math-closing dollar sign (#11227)

GitOrigin-RevId: ef2ef77e26df59d1af3df6dc664e284d3c70102d

libraries/overleaf-editor-core/test/support/fake_blob_store.js

@@ -0,0 +1,35 @@
+/**
+ * @typedef {import("../..").Blob } Blob
+ */
+
+/**
+ * @template T
+ * @typedef {import("bluebird")<T>} BPromise
+ */
+
+/**
+ * Fake blob store for tests
+ */
+class FakeBlobStore {
+  /**
+   * Get a string from the blob store
+   *
+   * @param {string} hash
+   * @return {BPromise<string>}
+   */
+  getString(hash) {
+    throw new Error('Not implemented')
+  }
+
+  /**
+   * Store a string in the blob store
+   *
+   * @param {string} content
+   * @return {BPromise<Blob>}
+   */
+  putString(content) {
+    throw new Error('Not implemented')
+  }
+}
+
+module.exports = FakeBlobStore

libraries/overleaf-editor-core/test/support/random.js

@@ -0,0 +1,38 @@
+//
+// Randomised testing helpers from OT.js:
+// https://github.com/Operational-Transformation/ot.js/blob/
+//   8873b7e28e83f9adbf6c3a28ec639c9151a838ae/test/helpers.js
+//
+'use strict'
+
+function randomInt(n) {
+  return Math.floor(Math.random() * n)
+}
+
+function randomString(n) {
+  let str = ''
+  while (n--) {
+    if (Math.random() < 0.15) {
+      str += '\n'
+    } else {
+      const chr = randomInt(26) + 97
+      str += String.fromCharCode(chr)
+    }
+  }
+  return str
+}
+
+function randomElement(arr) {
+  return arr[randomInt(arr.length)]
+}
+
+function randomTest(numTrials, test) {
+  return function () {
+    while (numTrials--) test()
+  }
+}
+
+exports.int = randomInt
+exports.string = randomString
+exports.element = randomElement
+exports.test = randomTest