Initial import with skill sheet working

node_modules/prettier-linter-helpers/test/index.test.js

@@ -0,0 +1,29 @@
+const {showInvisibles, generateDifferences} = require('..');
+const assert = require('assert');
+
+describe('showInvisibles', () => {
+  it('shows invisibles', () => {
+    assert.strictEqual(showInvisibles('1 2\n3\t4\r5'), '1·2⏎3↹4␍5');
+  });
+});
+
+describe('generateDifferences', () => {
+  it('operation: insert', () => {
+    const differences = generateDifferences('abc', 'abcdef');
+    assert.deepStrictEqual(differences, [
+      {operation: 'insert', offset: 3, insertText: 'def'},
+    ]);
+  });
+  it('operation: delete', () => {
+    const differences = generateDifferences('abcdef', 'abc');
+    assert.deepStrictEqual(differences, [
+      {operation: 'delete', offset: 3, deleteText: 'def'},
+    ]);
+  });
+  it('operation: replace', () => {
+    const differences = generateDifferences('abc', 'def');
+    assert.deepStrictEqual(differences, [
+      {operation: 'replace', offset: 0, deleteText: 'abc', insertText: 'def'},
+    ]);
+  });
+});