Hoist global state access out of individual components.

Access to "global" (maybe "external?") state is now handled at the top level of the component hierarchy, in `+page.svelte`, `+layout.svelte`, and their associated scripts. State is otherwise passed down through props, and changes are passed up through callbacks.

This is - hopefully - groundwork for refactoring state management a bit. I wanted to move access to state out to a smaller number of places, so that I have fewer places to update to implement reconnect logic. My broader goal is to make it easier to refactor these kinds of external side effects, as well, though no such changes are in this branch.

This change also makes testing a mile easier, since tests can interact with props and callbacks instead of emulating the whole HTTP request stack and the Pilcrow API. This change removes do-very-little tests.

1 files changed, 25 insertions, 36 deletions

diff --git a/ui/tests/lib/components/MessageInput.svelte.test.js b/ui/tests/lib/components/MessageInput.svelte.test.js
index 3dde5d7..508fb43 100644
--- a/ui/tests/lib/components/MessageInput.svelte.test.js
+++ b/ui/tests/lib/components/MessageInput.svelte.test.js
@@ -1,48 +1,37 @@
-import { flushSync, mount, unmount } from 'svelte';
-import { afterEach, beforeEach, describe, expect, test, vi } from 'vitest';
+import { render, screen } from '@testing-library/svelte';
+import userEvent from '@testing-library/user-event';
+import { beforeEach, expect, test, describe, it, vi } from 'vitest';
 import MessageInput from '$lib/components/MessageInput.svelte';
-import axios from 'axios';
 
-let component;
+const user = userEvent.setup();
 
-let mocks = vi.hoisted(() => ({
-  post: vi.fn()
+const mocks = vi.hoisted(() => ({
+  sendMessage: vi.fn()
 }));
 
-describe('MessageInput', () => {
-  beforeEach(() => {
-    vi.mock('axios', async (importActual) => {
-      const actual = await importActual();
-
-      const mockAxios = {
-        default: {
-          ...actual.default,
-          create: vi.fn(() => ({
-            ...actual.default.create(),
-            post: mocks.post
-          }))
-        }
-      };
-
-      return mockAxios;
+describe('CreateChannelForm', async () => {
+  beforeEach(async () => {
+    render(MessageInput, {
+      sendMessage: mocks.sendMessage
     });
-    mocks.post.mockResolvedValue({ status: 200 });
-
-    component = mount(MessageInput, {
-      target: document.body // `document` exists because of jsdom
-    });
-    flushSync();
   });
 
-  afterEach(() => {
-    unmount(component);
-  });
+  describe('sends a message', async () => {
+    it('with non-empty content', async () => {
+      const input = screen.getByRole('textbox');
+      await user.type(input, 'a happy surprise');
 
-  test('onsubmit happy path', async () => {
-    // Click the button, then flush the changes so you can synchronously write expectations
-    document.body.querySelector('button[type=submit]').click();
-    flushSync();
+      const send = screen.getByRole('button');
+      await user.click(send);
 
-    expect(mocks.post).toHaveBeenCalled();
+      expect(mocks.sendMessage).toHaveBeenCalledExactlyOnceWith('a happy surprise');
+    });
+
+    it('with empty content', async () => {
+      const send = screen.getByRole('button');
+      await user.click(send);
+
+      expect(mocks.sendMessage).toHaveBeenCalledExactlyOnceWith('');
+    });
   });
 });