fix: add console spy

Author: jhefferman-sfdc

packages/@lwc/integration-not-karma/helpers/console.js

@@ -0,0 +1,23 @@
+import { spyOn } from '@vitest/spy';
+
+/**
+ * A much simplified version of the spies originally used for Karma.
+ * Should probably be eventually replaced with individual spies.
+ */
+export function spyConsole() {
+    const log = spyOn(console, 'log');
+    const warn = spyOn(console, 'warn');
+    const error = spyOn(console, 'error');
+    return {
+        calls: {
+            log: log.mock.calls,
+            warn: warn.mock.calls,
+            error: error.mock.calls,
+        },
+        reset() {
+            log.mockRestore();
+            warn.mockRestore();
+            error.mockRestore();
+        },
+    };
+}