test: add rendering tests for MintelLogo and ContactFormNotification mail components.

packages/mail/src/index.test.tsx

@@ -0,0 +1,25 @@
+import { describe, it, expect } from "vitest";
+import * as React from "react";
+import { render } from "./index";
+import { MintelLogo } from "./components/MintelLogo";
+import { ContactFormNotification } from "./templates/ContactFormNotification";
+
+describe("@mintel/mail rendering", () => {
+  it("should render the MintelLogo to HTML", async () => {
+    const html = await render(React.createElement(MintelLogo));
+    expect(html).toContain("Mintel Logo");
+  });
+
+  it("should render a ContactFormNotification to HTML", async () => {
+    const html = await render(
+      React.createElement(ContactFormNotification, {
+        name: "Test User",
+        email: "test@example.com",
+        message: "Hello World",
+      }),
+    );
+    expect(html).toContain("New Submission");
+    expect(html).toContain("Test User");
+    expect(html).toContain("test@example.com");
+  });
+});