上映会にコメント機能追加（#297） (#299)

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Merge remote-tracking branch 'origin/main' into feature/297

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Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #299

backend/spec/requests/theatres_spec.rb

@@ -117,11 +117,18 @@ RSpec.describe 'Theatres API', type: :request do
         expect(theatre.host_user_id).to eq(member.id)
         expect(watch.expires_at).to be_within(1.second).of(30.seconds.from_now)
 
-        expect(json).to eq(
+        expect(json).to include(
           'host_flg' => true,
           'post_id' => nil,
           'post_started_at' => nil
         )
+
+        expect(json.fetch('watching_users')).to contain_exactly(
+          {
+            'id' => member.id,
+            'name' => 'member user'
+          }
+        )
       end
     end
 
@@ -167,11 +174,22 @@ RSpec.describe 'Theatres API', type: :request do
         expect(response).to have_http_status(:ok)
         expect(theatre.reload.host_user_id).to eq(other_user.id)
 
-        expect(json).to eq(
+        expect(json).to include(
           'host_flg' => false,
           'post_id' => nil,
           'post_started_at' => nil
         )
+
+        expect(json.fetch('watching_users')).to contain_exactly(
+          {
+            'id' => member.id,
+            'name' => 'member user'
+          },
+          {
+            'id' => other_user.id,
+            'name' => 'other user'
+          }
+        )
       end
     end