osartun · May 7, 2025 06:46 · Jun 17, 2021 · Jun 17, 2021
diff --git a/coderPadTSTestUtils.ts b/coderPadTSTestUtils.ts
@@ -30,14 +30,16 @@ const it = (name: string, cb: Function) => {
 
 /* Happy coding: */
 
+const { expect } = require('chai')
+
 describe('My suite', () => {
   describe('My nested suite', () => {
-    it('returns', () => {
-      // Do some assertions here
+    it('resolves successfully', () => {
+      expect(true).to.equal(true);
     })
 
-    it('throws', () => {
-      throw new Error('Some problem occurred')
+    it('throws an error', () => {
+      expect(true).to.equal(false);
     })
   })
 })
diff --git a/coderPadTSTestUtils.ts b/coderPadTSTestUtils.ts
@@ -0,0 +1,43 @@
+/**
+ * You want to use mocha in a TypeScript CoderPad but you get the error
+ * message that `describe` isn't defined even though you're already using
+ * the `mocha.suite.emit('pre-require', this, 'solution', mocha)` hack?
+ *
+ * > Cannot find name 'describe'. Do you need to install type definitions
+ * > for a test runner? Try `npm i --save-dev @types/jest` or
+ * > `npm i --save-dev @types/mocha`.
+ * 
+ * Here are a couple of lines to copy & paste into your pad to use
+ * `describe` and `it`:
+ */
+
+const describe = (name: string, cb: Function) => {
+  console.log(name);
+  console.group();
+  cb();
+  console.groupEnd();
+}
+
+const it = (name: string, cb: Function) => {
+  try {
+    cb();
+    console.log(`✅ ${name}`);
+  } catch (e) {
+    console.warn(`❌ ${name}`);
+    console.error(e);
+  }
+}
+
+/* Happy coding: */
+
+describe('My suite', () => {
+  describe('My nested suite', () => {
+    it('returns', () => {
+      // Do some assertions here
+    })
+
+    it('throws', () => {
+      throw new Error('Some problem occurred')
+    })
+  })
+})
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