Add tests

playwright/components/Dropdown/Dropdown.test.ts

@@ -0,0 +1,35 @@
+/*
+ *
+ * Copyright 2024 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * /
+ */
+import { expect, test } from "@playwright/test";
+
+test.describe("Dropdown", () => {
+  test("should be able to select a value", async ({ page }) => {
+    await page.goto(`iframe.html?viewMode=story&id=dropdown--default`, {
+      waitUntil: "networkidle",
+    });
+
+    await page.getByRole("combobox").click();
+    await expect(page).toHaveScreenshot({ fullPage: true });
+
+    await page.getByRole("option", { name: "Option 2" }).click();
+    await expect(page.getByRole("combobox")).toHaveText("Option 2");
+
+    await page.getByRole("combobox").click();
+    await expect(page).toHaveScreenshot({ fullPage: true });
+  });
+});

src/components/Dropdown/Dropdown.stories.tsx

@@ -17,14 +17,16 @@
  */
 import { Dropdown } from "./Dropdown";
 import { fn } from "@storybook/test";
+import { Meta } from "@storybook/react";
+import { ComponentProps } from "react";
 
 export default {
-  title: "Controls/Dropdown",
+  title: "Dropdown",
   component: Dropdown,
   tags: ["autodocs"],
   parameters: {
     controls: {
-      include: ["defaultValue", "placeholder", "error", "values"],
+      include: ["defaultValue", "placeholder", "error"],
     },
   },
   argTypes: {
@@ -38,7 +40,7 @@ export default {
       type: "string",
     },
     values: {
-      type: "array",
+      type: "string",
     },
   },
   args: {
@@ -50,7 +52,7 @@ export default {
       ["Option2", "Option 2"],
     ],
   },
-};
+} satisfies Meta<ComponentProps<typeof Dropdown>>;
 
 export const Default = {
   parameters: {

src/components/Dropdown/Dropdown.test.tsx

@@ -0,0 +1,83 @@
+/*
+ *
+ * Copyright 2024 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * /
+ */
+
+import { describe, expect, it } from "vitest";
+import { composeStories } from "@storybook/react";
+import * as stories from "./Dropdown.stories";
+import { act, render, waitFor } from "@testing-library/react";
+import React from "react";
+import { userEvent } from "@storybook/test";
+
+const { Default, WithHelpLabel, WithError, WithDefaultValue } =
+  composeStories(stories);
+
+describe("Dropdown", () => {
+  it("renders a Default dropdown", () => {
+    const { container } = render(<Default />);
+    expect(container).toMatchSnapshot();
+  });
+  it("renders a dropdown with a help label", () => {
+    const { container } = render(<WithHelpLabel />);
+    expect(container).toMatchSnapshot();
+  });
+  it("renders a dropdown with an error ", () => {
+    const { container } = render(<WithError />);
+    expect(container).toMatchSnapshot();
+  });
+  it("renders a dropdown with a default value ", () => {
+    const { container } = render(<WithDefaultValue />);
+    expect(container).toMatchSnapshot();
+  });
+  it("can be opened", async () => {
+    const { getByRole, container } = render(<Default />);
+    await act(async () => {
+      await userEvent.click(getByRole("combobox"));
+    });
+    expect(container).toMatchSnapshot();
+  });
+  it("can select a value", async () => {
+    const { getByRole, container } = render(<Default />);
+    await act(async () => {
+      await userEvent.click(getByRole("combobox"));
+    });
+
+    await waitFor(() =>
+      expect(getByRole("option", { name: "Option 2" })).toBeInTheDocument(),
+    );
+
+    await act(async () => {
+      await userEvent.click(getByRole("option", { name: "Option 2" }));
+    });
+
+    expect(getByRole("combobox")).toHaveTextContent("Option 2");
+
+    await act(async () => {
+      await userEvent.click(getByRole("combobox"));
+    });
+
+    await waitFor(() =>
+      expect(getByRole("option", { name: "Option 2" })).toHaveAttribute(
+        "aria-selected",
+        "true",
+      ),
+    );
+
+    // Option 2 should be selected
+    expect(container).toMatchSnapshot();
+  });
+});