testing js app

node_modules/jest-diff/build/diffStrings.js

@@ -0,0 +1,78 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.default = void 0;
+
+var _diffSequences = _interopRequireDefault(require('diff-sequences'));
+
+var _cleanupSemantic = require('./cleanupSemantic');
+
+function _interopRequireDefault(obj) {
+  return obj && obj.__esModule ? obj : {default: obj};
+}
+
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+const diffStrings = (a, b) => {
+  const isCommon = (aIndex, bIndex) => a[aIndex] === b[bIndex];
+
+  let aIndex = 0;
+  let bIndex = 0;
+  const diffs = [];
+
+  const foundSubsequence = (nCommon, aCommon, bCommon) => {
+    if (aIndex !== aCommon) {
+      diffs.push(
+        new _cleanupSemantic.Diff(
+          _cleanupSemantic.DIFF_DELETE,
+          a.slice(aIndex, aCommon)
+        )
+      );
+    }
+
+    if (bIndex !== bCommon) {
+      diffs.push(
+        new _cleanupSemantic.Diff(
+          _cleanupSemantic.DIFF_INSERT,
+          b.slice(bIndex, bCommon)
+        )
+      );
+    }
+
+    aIndex = aCommon + nCommon; // number of characters compared in a
+
+    bIndex = bCommon + nCommon; // number of characters compared in b
+
+    diffs.push(
+      new _cleanupSemantic.Diff(
+        _cleanupSemantic.DIFF_EQUAL,
+        b.slice(bCommon, bIndex)
+      )
+    );
+  };
+
+  (0, _diffSequences.default)(a.length, b.length, isCommon, foundSubsequence); // After the last common subsequence, push remaining change items.
+
+  if (aIndex !== a.length) {
+    diffs.push(
+      new _cleanupSemantic.Diff(_cleanupSemantic.DIFF_DELETE, a.slice(aIndex))
+    );
+  }
+
+  if (bIndex !== b.length) {
+    diffs.push(
+      new _cleanupSemantic.Diff(_cleanupSemantic.DIFF_INSERT, b.slice(bIndex))
+    );
+  }
+
+  return diffs;
+};
+
+var _default = diffStrings;
+exports.default = _default;