import { test, expect, beforeEach } from "bun:test";
import { Window } from "happy-dom";
import { NAV_RUNTIME } from "../src/nav-runtime.ts";
let win: any;
let fetchCalls: { url: string; opts: any }[];
let nextHtml: string;
function install(bodyHtml: string): void {
win = new Window({ url: "https://example.test/" });
win.document.body.innerHTML = bodyHtml;
fetchCalls = [];
nextHtml = "";
const g = globalThis as any;
g.window = win;
g.document = win.document;
g.history = win.history;
g.location = win.location;
g.DOMParser = win.DOMParser;
g.CustomEvent = win.CustomEvent;
g.fetch = win.fetch = (url: string, opts: any) => {
fetchCalls.push({ url, opts });
return Promise.resolve({
redirected: false,
url,
headers: {
get: (k: string) =>
k.toLowerCase() === "content-type" ? "text/html; charset=utf-8" : null,
},
text: () => Promise.resolve(nextHtml),
});
};
(0, eval)(NAV_RUNTIME);
}
const flush = () => new Promise((r) => setTimeout(r, 0));
beforeEach(() => {
const g = globalThis as any;
for (const k of [
"window",
"document",
"history",
"location",
"DOMParser",
"CustomEvent",
"fetch",
]) {
delete g[k];
}
});
test("intercepts an internal link click and swaps #app in place", async () => {
install(``);
nextHtml =
`About` +
`About page
`;
win.document.getElementById("lnk").click();
await flush();
expect(fetchCalls.length).toBe(1);
expect(fetchCalls[0]!.url).toContain("/about");
expect(fetchCalls[0]!.opts.headers["x-wrnexus-nav"]).toBe("1");
expect(win.document.getElementById("app").innerHTML).toContain("About page");
expect(win.document.title).toBe("About");
});
test("ignores cross-origin links (full navigation)", async () => {
install(``);
win.document.getElementById("lnk").click();
await flush();
expect(fetchCalls.length).toBe(0);
});
test("ignores modified clicks so new-tab still works", async () => {
install(``);
win.document
.getElementById("lnk")
.dispatchEvent(
new win.MouseEvent("click", { bubbles: true, cancelable: true, button: 0, metaKey: true }),
);
await flush();
expect(fetchCalls.length).toBe(0);
});
test("exposes programmatic navigation", async () => {
install(`Home
`);
nextHtml = `DashDashboard
`;
expect(typeof win.__wrnexusNavigate).toBe("function");
win.__wrnexusNavigate("/dashboard");
await flush();
expect(fetchCalls.length).toBe(1);
expect(win.document.getElementById("app").innerHTML).toContain("Dashboard");
});