Merge remote-tracking branch 'origin/prop/js-tests'

1 files changed, 48 insertions, 0 deletions

diff --git a/ui/tests/lib/components/MessageInput.svelte.test.js b/ui/tests/lib/components/MessageInput.svelte.test.js
new file mode 100644
index 0000000..d90026c
--- /dev/null
+++ b/ui/tests/lib/components/MessageInput.svelte.test.js
@@ -0,0 +1,48 @@
+import { flushSync, mount, unmount } from 'svelte';
+import { afterEach, beforeEach, describe, expect, test, vi } from 'vitest';
+import MessageInput from '$lib/components/MessageInput.svelte';
+import axios from 'axios';
+
+let component;
+
+let mocks = vi.hoisted(() => ({
+  post: 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;
+    });
+    mocks.post.mockResolvedValue({ status: 200 });
+
+    component = mount(MessageInput, {
+      target: document.body, // `document` exists because of jsdom
+    });
+    flushSync();
+  });
+
+  afterEach(() => {
+    unmount(component);
+  });
+
+  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();
+
+    expect(mocks.post).toHaveBeenCalled();
+  });
+});