106 - Extract shared community id resolution into LemmyApiService

tests/Feature/Http/Controllers/Api/V1/OnboardingControllerTest.php

@@ -96,7 +96,10 @@ public function test_status_shows_route_step_when_platform_account_feed_and_chan
         $language = Language::first();
         PlatformAccount::factory()->create(['is_active' => true]);
         Feed::factory()->language($language)->create(['is_active' => true]);
-        PlatformChannel::factory()->create(['is_active' => true]);
+        // Reuse the seeded language: PlatformChannelFactory otherwise creates one via
+        // faker->unique()->languageCode(), which can randomly draw 'en' and collide with
+        // the short_code created in setUp().
+        PlatformChannel::factory()->create(['is_active' => true, 'language_id' => $language->id]);
 
         $response = $this->getJson('/api/v1/onboarding/status');
 
@@ -119,7 +122,8 @@ public function test_status_shows_no_onboarding_needed_when_all_components_exist
         $language = Language::first();
         PlatformAccount::factory()->create(['is_active' => true]);
         Feed::factory()->language($language)->create(['is_active' => true]);
-        PlatformChannel::factory()->create(['is_active' => true]);
+        // Reuse the seeded language — see note above re: languageCode() collisions.
+        PlatformChannel::factory()->create(['is_active' => true, 'language_id' => $language->id]);
         Route::factory()->create(['is_active' => true]);
 
         $response = $this->getJson('/api/v1/onboarding/status');