--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/style.test.ts	Mon May 08 17:27:44 2023 -0700
@@ -0,0 +1,15 @@
+import { describe, expect, it } from "vitest";
+import { addFontToRootPage } from "./style";
+
+describe("addFontToRootPage", () => {
+  it("adds a style block", () => {
+    addFontToRootPage();
+    const el = document.head.children[0] as HTMLElement;
+    expect(el.innerText).toContain("@font-face");
+  });
+  it("is idempotent", () => {
+    addFontToRootPage();
+    addFontToRootPage();
+    expect(document.head.children.length).toBe(1);
+  });
+});