test: Newsモデルのバリデーション・スコープのテストを追加

Author: nacchan99

spec/models/news_spec.rb

@@ -1,5 +1,67 @@
 require 'rails_helper'
 
 RSpec.describe News, type: :model do
-  pending "add some examples to (or delete) #{__FILE__}"
+  describe 'バリデーション' do
+    let(:news) { build(:news) }
+
+    it '有効なファクトリーを持つ' do
+      expect(news).to be_valid
+    end
+
+    describe 'title' do
+      it 'presence: true' do
+        news.title = nil
+        expect(news).not_to be_valid
+        expect(news.errors[:title]).not_to be_empty
+      end
+    end
+
+    describe 'url' do
+      it 'presence: true' do
+        news.url = nil
+        expect(news).not_to be_valid
+        expect(news.errors[:url]).not_to be_empty
+      end
+
+      it 'uniqueness: true' do
+        create(:news, url: 'https://example.com/test')
+        duplicate_news = build(:news, url: 'https://example.com/test')
+        expect(duplicate_news).not_to be_valid
+        expect(duplicate_news.errors[:url]).not_to be_empty
+      end
+
+      it 'URL形式であること' do
+        news.url = 'invalid-url'
+        expect(news).not_to be_valid
+        expect(news.errors[:url]).not_to be_empty
+      end
+
+      it 'HTTPSとHTTPを許可する' do
+        news.url = 'https://example.com'
+        expect(news).to be_valid
+
+        news.url = 'http://example.com'
+        expect(news).to be_valid
+      end
+    end
+
+    describe 'published_at' do
+      it 'presence: true' do
+        news.published_at = nil
+        expect(news).not_to be_valid
+        expect(news.errors[:published_at]).not_to be_empty
+      end
+    end
+  end
+
+  describe 'スコープ' do
+    describe '.recent' do
+      it '公開日時の降順で並び替える' do
+        old_news = create(:news, published_at: 2.days.ago)
+        new_news = create(:news, published_at: 1.day.ago)
+
+        expect(News.recent).to eq([new_news, old_news])
+      end
+    end
+  end
 end