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import type { SurfaceServerMessage } from "@dispatch/ui-contract";
import { render, screen } from "@testing-library/svelte";
import userEvent from "@testing-library/user-event";
import { describe, expect, it } from "vitest";
import type { WebSocketLike } from "../adapters/ws";
import App from "./App.svelte";
import { createAppStore } from "./store.svelte";
interface FakeSocket extends WebSocketLike {
sent: string[];
resolveOpen(): void;
feedMessage(data: SurfaceServerMessage): void;
}
function fakeSocket(): FakeSocket {
let onopen: (() => void) | null = null;
let onmessage: ((ev: { data: string }) => void) | null = null;
const sent: string[] = [];
const ws: FakeSocket = {
send(data: string) {
sent.push(data);
},
close() {},
get onopen() {
return onopen;
},
set onopen(fn) {
onopen = fn;
},
get onmessage() {
return onmessage;
},
set onmessage(fn) {
onmessage = fn;
},
get onclose() {
return null;
},
set onclose(_fn) {},
resolveOpen() {
onopen?.();
},
feedMessage(msg: SurfaceServerMessage) {
onmessage?.({ data: JSON.stringify(msg) });
},
sent,
};
return ws;
}
function sentMessages(ws: FakeSocket) {
return ws.sent.map((s) => JSON.parse(s));
}
describe("App component interaction tests", () => {
it("renders empty state when catalog is empty", () => {
const ws = fakeSocket();
const store = createAppStore({ socketFactory: () => ws });
ws.resolveOpen();
render(App, { props: { store } });
expect(screen.getByText("No surfaces available")).toBeInTheDocument();
store.dispose();
});
it("renders a catalog button per entry after a catalog message", () => {
const ws = fakeSocket();
const store = createAppStore({ socketFactory: () => ws });
ws.resolveOpen();
ws.feedMessage({
type: "catalog",
catalog: [
{ id: "s1", region: "sidebar", title: "Surface One" },
{ id: "s2", region: "panel", title: "Surface Two" },
],
});
render(App, { props: { store } });
const buttons = screen.getAllByRole("button");
expect(buttons).toHaveLength(2);
expect(buttons[0]).toHaveTextContent("Surface One");
expect(buttons[1]).toHaveTextContent("Surface Two");
store.dispose();
});
it("clicking a catalog entry subscribes and renders its surface", async () => {
const ws = fakeSocket();
const store = createAppStore({ socketFactory: () => ws });
ws.resolveOpen();
ws.feedMessage({
type: "catalog",
catalog: [{ id: "s1", region: "sidebar", title: "Surface One" }],
});
render(App, { props: { store } });
const user = userEvent.setup();
const button = screen.getByRole("button", { name: /Surface One/ });
ws.sent.length = 0;
await user.click(button);
const msgs = sentMessages(ws);
const subscribe = msgs.find(
(m: { type: string; surfaceId: string }) => m.type === "subscribe" && m.surfaceId === "s1",
);
expect(subscribe).toBeTruthy();
ws.feedMessage({
type: "surface",
spec: {
id: "s1",
region: "sidebar",
title: "Surface One",
fields: [{ kind: "stat", label: "Tokens", value: "1,234" }],
},
});
expect(await screen.findByRole("heading", { name: "Surface One" })).toBeInTheDocument();
expect(await screen.findByText("Tokens")).toBeInTheDocument();
expect(await screen.findByText("1,234")).toBeInTheDocument();
store.dispose();
});
it("clicking a different entry unsubscribes the previous then subscribes the new", async () => {
const ws = fakeSocket();
const store = createAppStore({ socketFactory: () => ws });
ws.resolveOpen();
ws.feedMessage({
type: "catalog",
catalog: [
{ id: "s1", region: "sidebar", title: "Surface One" },
{ id: "s2", region: "panel", title: "Surface Two" },
],
});
render(App, { props: { store } });
const user = userEvent.setup();
await user.click(screen.getByRole("button", { name: /Surface One/ }));
ws.sent.length = 0;
await user.click(screen.getByRole("button", { name: /Surface Two/ }));
const msgs = sentMessages(ws) as Array<{ type: string; surfaceId: string }>;
const unsubIdx = msgs.findIndex((m) => m.type === "unsubscribe" && m.surfaceId === "s1");
const subIdx = msgs.findIndex((m) => m.type === "subscribe" && m.surfaceId === "s2");
expect(unsubIdx).toBeGreaterThanOrEqual(0);
expect(subIdx).toBeGreaterThanOrEqual(0);
expect(unsubIdx).toBeLessThan(subIdx);
store.dispose();
});
it("selected catalog button reflects aria-current", async () => {
const ws = fakeSocket();
const store = createAppStore({ socketFactory: () => ws });
ws.resolveOpen();
ws.feedMessage({
type: "catalog",
catalog: [
{ id: "s1", region: "sidebar", title: "Surface One" },
{ id: "s2", region: "panel", title: "Surface Two" },
],
});
render(App, { props: { store } });
const user = userEvent.setup();
const btn1 = screen.getByRole("button", { name: /Surface One/ });
const btn2 = screen.getByRole("button", { name: /Surface Two/ });
await user.click(btn1);
expect(btn1).toHaveAttribute("aria-current", "true");
expect(btn2).not.toHaveAttribute("aria-current");
await user.click(btn2);
expect(btn2).toHaveAttribute("aria-current", "true");
expect(btn1).not.toHaveAttribute("aria-current");
store.dispose();
});
it("an error message renders the alert banner", () => {
const ws = fakeSocket();
const store = createAppStore({ socketFactory: () => ws });
ws.resolveOpen();
ws.feedMessage({
type: "error",
message: "Something went wrong",
});
render(App, { props: { store } });
const alert = screen.getByRole("alert");
expect(alert).toHaveTextContent("Something went wrong");
store.dispose();
});
it("invoking a field action sends an invoke", async () => {
const ws = fakeSocket();
const store = createAppStore({ socketFactory: () => ws });
ws.resolveOpen();
ws.feedMessage({
type: "catalog",
catalog: [{ id: "s1", region: "sidebar", title: "Surface One" }],
});
render(App, { props: { store } });
const user = userEvent.setup();
await user.click(screen.getByRole("button", { name: /Surface One/ }));
ws.feedMessage({
type: "surface",
spec: {
id: "s1",
region: "sidebar",
title: "Surface One",
fields: [
{
kind: "toggle",
label: "Dark Mode",
value: false,
action: { actionId: "toggle-dark" },
},
],
},
});
ws.sent.length = 0;
const checkbox = await screen.findByRole("checkbox", { name: "Dark Mode" });
await user.click(checkbox);
const msgs = sentMessages(ws);
const invoke = msgs.find(
(m: { type: string; surfaceId: string; actionId: string; payload: unknown }) =>
m.type === "invoke" &&
m.surfaceId === "s1" &&
m.actionId === "toggle-dark" &&
m.payload === true,
);
expect(invoke).toBeTruthy();
store.dispose();
});
});
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