chore: array matcher memo

ruby/testing/spec/array_matcher_spec.rb

@@ -0,0 +1,49 @@
+describe('array matcher') do
+  it do
+    users = [
+      { 'name' => 'John', 'age' => 25 },
+      { 'name' => 'Jane', 'age' => 22 },
+    ]
+
+    expect(users).to contain_exactly(
+      { 'name' => 'John', 'age' => 25 },
+      { 'name' => 'Jane', 'age' => 22 },
+    )
+  end
+
+  describe 'include は特定の要素が含まれているかどうかのみをチェックする' do
+    it '特定の要素が全て含まれている' do
+      users = [
+        { 'name' => 'John', 'age' => 25 },
+        { 'name' => 'Jane', 'age' => 22 },
+      ].shuffle
+
+      expect(users).to include(
+        { 'name' => 'John', 'age' => 25 },
+        { 'name' => 'Jane', 'age' => 22 },
+      )
+    end
+
+    it '特定の要素が一部含まれている' do
+      users = [
+        { 'name' => 'John', 'age' => 25 },
+        { 'name' => 'Jane', 'age' => 22 },
+      ].shuffle
+
+      expect(users).to include(
+        { 'name' => 'John', 'age' => 25 },
+      )
+    end
+
+    it '特定の要素が含まれていない (Fail)' do
+      users = [
+        { 'name' => 'John', 'age' => 25 },
+        { 'name' => 'Jane', 'age' => 22 },
+      ].shuffle
+
+      expect(users).to include(
+        { 'name' => 'Sam', 'age' => 41 },
+      )
+    end
+  end
+end