Cover the composer alt-text round-trip with a browser test

tests/Browser/AltTextTest.php

@@ -0,0 +1,87 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Enums\UserWorkspace\Role;
+use App\Models\Post;
+use App\Models\User;
+use App\Models\Workspace;
+
+/**
+ * Flag when the composer's debounced autosave PUT finishes so the test can wait
+ * on the real round-trip instead of a fixed sleep. Inertia v3 issues the update
+ * over the built-in XHR client, so the completion is observable via loadend.
+ */
+function trackAutosave(mixed $page): void
+{
+    $page->script(<<<'JS'
+        (() => {
+            window.__autosaveDone = false;
+            const open = XMLHttpRequest.prototype.open;
+            const send = XMLHttpRequest.prototype.send;
+            XMLHttpRequest.prototype.open = function (method) {
+                this.__method = (method || '').toUpperCase();
+                return open.apply(this, arguments);
+            };
+            XMLHttpRequest.prototype.send = function () {
+                this.addEventListener('loadend', () => {
+                    if (this.__method === 'PUT') {
+                        window.__autosaveDone = true;
+                    }
+                });
+                return send.apply(this, arguments);
+            };
+        })();
+    JS);
+}
+
+/**
+ * Poll on the browser side until the autosave PUT has completed, keeping the
+ * in-process server pumped while the debounce (1.5s) elapses and the request
+ * round-trips.
+ */
+function waitForAutosave(mixed $page): void
+{
+    $page->script(<<<'JS'
+        (async () => {
+            for (let attempt = 0; attempt < 100 && ! window.__autosaveDone; attempt++) {
+                await new Promise((resolve) => setTimeout(resolve, 100));
+            }
+        })();
+    JS);
+}
+
+test('editing alt text on an attached image persists it to the post media', function () {
+    $user = User::factory()->create();
+    $workspace = Workspace::factory()->create(['user_id' => $user->id]);
+    $workspace->members()->attach($user->id, ['role' => Role::Member->value]);
+    $user->update(['current_workspace_id' => $workspace->id]);
+
+    $post = Post::factory()->create([
+        'workspace_id' => $workspace->id,
+        'user_id' => $user->id,
+        'content' => 'hello',
+        'media' => [[
+            'id' => 'm1',
+            'type' => 'image',
+            'mime_type' => 'image/png',
+            'path' => 'uploads/x.png',
+            'url' => 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==',
+        ]],
+    ]);
+
+    $this->actingAs($user);
+
+    $page = visit(route('app.posts.edit', $post));
+
+    trackAutosave($page);
+
+    $page->click('@alt-text-button')
+        ->type('@alt-text-input', 'a golden retriever on a beach')
+        ->click('@alt-text-save');
+
+    waitForAutosave($page);
+
+    expect($post->fresh()->media[0]['meta']['alt_text'])
+        ->toBe('a golden retriever on a beach');
+});