Add logjam example

examples/logjam/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "logjam",
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "start": "vitest --ui",
+    "test": "vitest"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/stevekinney/testing-javascript.git"
+  },
+  "author": "Steve Kinney <hello@stevekinney.net>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/stevekinney/testing-javascript/issues"
+  },
+  "homepage": "https://github.com/stevekinney/testing-javascript#readme",
+  "devDependencies": {
+    "@vitest/ui": "^2.1.1",
+    "vite": "^5.4.5",
+    "vitest": "^2.1.1"
+  }
+}

examples/logjam/src/log.js

@@ -0,0 +1,19 @@
+/// <reference types="vite/client" />
+
+export function log(...args) {
+  if (import.meta.env.MODE !== 'production') {
+    console.log(...args);
+  }
+}
+
+log.error = function error(...args) {
+  if (import.meta.env.MODE !== 'production') {
+    console.log(...args);
+  }
+};
+
+log.warn = function warn(...args) {
+  if (import.meta.env.MODE !== 'production') {
+    console.warn(...args);
+  }
+};

examples/logjam/src/log.test.js

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+import { expect, it, vi, beforeEach, afterEach, describe } from 'vitest';
+import { log } from './log';
+
+describe.todo('logger', () => {
+  it('logs to the console in development mode', () => {
+    const spy = vi.spyOn(console, 'log');
+
+    log('Hello, world!');
+
+    expect(spy).toHaveBeenCalledWith('Hello, world!');
+
+    spy.mockRestore();
+  });
+});