test: add the behavioral spec suites (pilot + ten domains)

98 tests pinning observable behavior ahead of the authorship rewrite.

tests/Feature/PilotSpec/InstallationChecksTest.php

@@ -0,0 +1,42 @@
+<?php
+
+// Pilot behavioural suite — requirements and permissions checks.
+// Spec: platform-operations-spec.md §3.
+
+use function Pest\Laravel\getJson;
+
+beforeEach(function () {
+    Artisan::call('db:seed', ['--class' => 'DatabaseSeeder', '--force' => true]);
+});
+
+it('reports the PHP version block against the configured minimum', function () {
+    $payload = getJson('/api/v1/installation/requirements')->assertOk()->json();
+
+    $php = $payload['phpSupportInfo'];
+    expect($php['minimum'])->toBe(config('installer.core.minPhpVersion'));
+    expect($php['full'])->toBe(PHP_VERSION);
+    expect($php['current'])->toMatch('/^\d+(\.\d+)*$/');
+    expect($php['supported'])->toBe(version_compare($php['current'], $php['minimum']) >= 0);
+});
+
+it('checks every required PHP extension', function () {
+    $payload = getJson('/api/v1/installation/requirements')->assertOk()->json();
+
+    $checked = $payload['requirements']['requirements']['php'];
+    foreach (config('installer.requirements')['php'] as $extension) {
+        expect($checked)->toHaveKey($extension);
+        expect($checked[$extension])->toBe(extension_loaded($extension));
+    }
+});
+
+it('reports folder permissions with a consistent errors flag', function () {
+    $payload = getJson('/api/v1/installation/permissions')->assertOk()->json();
+
+    $entries = $payload['permissions']['permissions'];
+    $folders = array_column($entries, 'folder');
+    foreach (array_keys(config('installer.permissions')) as $folder) {
+        expect($folders)->toContain($folder);
+    }
+    $anyFailed = collect($entries)->contains(fn ($entry) => $entry['isSet'] === false);
+    expect($payload['permissions']['errors'])->toBe($anyFailed ? true : null);
+});