test: テストファイル追加

src/tests/componenteSample.spec.js

@@ -0,0 +1,13 @@
+import App from "../App";
+import React from "react";
+import '@testing-library/jest-dom'
+import { render, screen } from "@testing-library/react";
+
+describe("Title Test", () => {
+  it("タイトルが学習記録一覧であること", () => {
+    // testId(title)を指定して取得
+    render(<App />);
+    const title = screen.getByTestId("title");
+    expect(title).toHaveTextContent("学習記録一覧");
+  });
+});

src/tests/sample.spec.js

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+describe("Sample Test", () => {
+  it("should return true", () => {
+    expect(true).toBe(true);
+  });
+});