複数キーワードでの検索のテストを追加

refs #1510

### 概要
検索可能なリソースごとに半角・全角スペース区切りで複数キーワード検索をした際に検索結果が絞り込めているかどうかを観点としてテストを追加

### 修正内容
#### 複数キーワードでの検索のテストを追加
全ての検索可能なリソースに対して3つのケースでの検証を行っている

- 単一キーワードで検索した場合
  - 絞り込み前の比較対象
- 半角スペース区切りの複数キーワードで検索した場合
  - AND検索 になっているかどうか(想定通り絞り込まれているかどうか)
- 全角スペース区切りの複数キーワードで検索した場合
  - AND検索 になっているかどうか(想定通り絞り込まれているかどうか)

### その他の修正
- test/fixtures/pages.yml で typo があり、 expected を書く際にややこしかったため正しいスペルに修正
  - Bootcmap => Bootcamp

test/fixtures/pages.yml

@@ -11,5 +11,5 @@ page_3:
   body: "## 存在しないDocsページ遷移テスト\n[存在しないページ](http://localhost:3000/pages/5555555)"
 
 page_4:
-  title: Bootcmapの作業のページ
+  title: Bootcampの作業のページ
   body: "## テスト\nテスト"

test/models/searcher_test.rb

@@ -84,4 +84,102 @@ class SearchableTest < ActiveSupport::TestCase
     assert_equal [reports(:report_12), reports(:report_14), reports(:report_13)], result
     assert_not_includes(result, Answer)
   end
+
+  test "returns only reports having all keywords" do
+    result = Searcher.search("日報", document_type: :reports)
+    assert_includes(result, reports(:report_9))
+    assert_includes(result, reports(:report_8))
+
+    result = Searcher.search("日報 WIP", document_type: :reports)
+    assert_includes(result, reports(:report_9))
+    assert_not_includes(result, reports(:report_8))
+
+    result = Searcher.search("日報　WIP", document_type: :reports)
+    assert_includes(result, reports(:report_9))
+    assert_not_includes(result, reports(:report_8))
+  end
+
+  test "returns only pages having all keywords" do
+    result = Searcher.search("テスト", document_type: :pages)
+    assert_includes(result, pages(:page_4))
+    assert_includes(result, pages(:page_3))
+
+    result = Searcher.search("テスト Bootcamp", document_type: :pages)
+    assert_includes(result, pages(:page_4))
+    assert_not_includes(result, pages(:page_3))
+
+    result = Searcher.search("テスト　Bootcamp", document_type: :pages)
+    assert_includes(result, pages(:page_4))
+    assert_not_includes(result, pages(:page_3))
+  end
+
+  test "returns only practices having all keywords" do
+    result = Searcher.search("OS", document_type: :practices)
+    assert_includes(result, practices(:practice_1))
+    assert_includes(result, practices(:practice_3))
+
+    result = Searcher.search("OS クリーンインストール", document_type: :practices)
+    assert_includes(result, practices(:practice_1))
+    assert_not_includes(result, practices(:practice_3))
+
+    result = Searcher.search("OS　クリーンインストール", document_type: :practices)
+    assert_includes(result, practices(:practice_1))
+    assert_not_includes(result, practices(:practice_3))
+  end
+
+  test "returns only questions having all keywords" do
+    result = Searcher.search("使う", document_type: :questions)
+    assert_includes(result, questions(:question_2))
+    assert_includes(result, questions(:question_1))
+
+    result = Searcher.search("使う エディター", document_type: :questions)
+    assert_includes(result, questions(:question_1))
+    assert_not_includes(result, questions(:question_2))
+
+    result = Searcher.search("使う　エディター", document_type: :questions)
+    assert_includes(result, questions(:question_1))
+    assert_not_includes(result, questions(:question_2))
+  end
+
+  test "returns only answers of questions having all keywords" do
+    result = Searcher.search("です", document_type: :questions)
+    assert_includes(result, answers(:answer_1))
+    assert_includes(result, answers(:answer_5))
+
+    result = Searcher.search("です atom", document_type: :questions)
+    assert_includes(result, answers(:answer_1))
+    assert_not_includes(result, answers(:answer_5))
+
+    result = Searcher.search("です　atom", document_type: :questions)
+    assert_includes(result, answers(:answer_1))
+    assert_not_includes(result, answers(:answer_5))
+  end
+
+  test "returns only announcements having all keywords" do
+    result = Searcher.search("お知らせ", document_type: :announcements)
+    assert_includes(result, announcements(:announcement_3))
+    assert_includes(result, announcements(:announcement_notification_active_user))
+
+    result = Searcher.search("お知らせ 通知", document_type: :announcements)
+    assert_includes(result, announcements(:announcement_notification_active_user))
+    assert_not_includes(result, announcements(:announcement_3))
+
+    result = Searcher.search("お知らせ　通知", document_type: :announcements)
+    assert_includes(result, announcements(:announcement_notification_active_user))
+    assert_not_includes(result, announcements(:announcement_3))
+  end
+
+  test "returns only comments having all keywords" do
+    result = Searcher.search("report_id", document_type: :reports)
+    assert_includes(result, comments(:comment_6))
+    assert_includes(result, comments(:comment_5))
+
+    result = Searcher.search("report_id typo", document_type: :reports)
+    assert_includes(result, comments(:comment_6))
+    assert_not_includes(result, comments(:comment_5))
+
+    result = Searcher.search("report_id　typo", document_type: :reports)
+    assert_includes(result, comments(:comment_6))
+    assert_not_includes(result, comments(:comment_5))
+  end
 end