Add passing tests for Switch

packages/react-components/src/components/Switch/Switch.test.tsx

@@ -0,0 +1,39 @@
+import "@testing-library/jest-dom";
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+
+import Switch from "./Switch";
+
+afterEach(() => {
+  cleanup();
+});
+
+describe("Switch", () => {
+  it("renders an HTML input component", () => {
+    render(<Switch>Flip me</Switch>);
+
+    const switchElements = screen.getAllByLabelText(/flip me/i);
+
+    expect(switchElements).toHaveLength(1);
+    expect(switchElements[0].tagName).toBe("INPUT");
+    expect(switchElements[0]).toHaveAccessibleName(/flip me/i);
+  });
+
+  it("onChange handler fires on click", () => {
+    const handleChange = jest.fn();
+    render(<Switch onChange={handleChange}>Power</Switch>);
+
+    const switchElement = screen.getByLabelText(/power/i);
+
+    fireEvent.click(switchElement);
+
+    expect(handleChange).toHaveBeenCalled();
+  });
+
+  it("defaultSelected adds checked attribute", () => {
+    render(<Switch defaultSelected>Standby</Switch>);
+
+    const switchElement = screen.getByLabelText(/standby/i);
+
+    expect(switchElement).toHaveAttribute("checked");
+  });
+});