Accordion

package.json

@@ -106,6 +106,7 @@
   },
   "dependencies": {
     "@radix-ui/react-dropdown-menu": "^2.0.6",
+    "@radix-ui/react-accordion": "^1.1.2",
     "@radix-ui/react-form": "^0.0.3",
     "@radix-ui/react-separator": "^1.0.3",
     "@radix-ui/react-tooltip": "^1.0.6",

src/components/Accordion/Accordion.module.css

@@ -0,0 +1,41 @@
+/*
+Copyright 2023 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.
+*/
+
+.trigger {
+  all: unset;
+  display: flex;
+  flex-direction: row;
+  align-items: start;
+  gap: var(--cpd-space-2x);
+  cursor: pointer;
+}
+
+.trigger:focus {
+  outline: 2px solid var(--cpd-color-border-focused);
+  outline-offset: 1px;
+}
+
+.icon {
+  transform: rotate(0);
+  transform-origin: center center;
+  transition: 300ms ease;
+  color: var(--cpd-color-icon-secondary);
+  flex-shrink: 0;
+}
+
+.trigger[aria-expanded="true"] .icon {
+  transform: rotate(90deg);
+}

src/components/Accordion/Accordion.stories.tsx

@@ -0,0 +1,84 @@
+/*
+Copyright 2023 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 React from "react";
+import { Meta } from "@storybook/react";
+import { Item } from "./Accordion";
+
+import { Root as AccordionComponent } from "./Accordion";
+
+const LOREM_IPSUM =
+  "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.";
+
+export default {
+  title: "Accordion",
+  component: AccordionComponent,
+  tags: ["autodocs"],
+  argTypes: {
+    onValueChange: { action: "onValueChange" },
+  },
+  args: {
+    collapsible: true,
+    children: (
+      <>
+        <Item trigger="Item 1" value="item1">
+          {LOREM_IPSUM}
+        </Item>
+        <Item trigger="Item 2" value="item2">
+          {LOREM_IPSUM}
+        </Item>
+        <Item trigger="Item 3" value="item3">
+          {LOREM_IPSUM}
+        </Item>
+      </>
+    ),
+  },
+} as Meta<typeof AccordionComponent>;
+
+export const Default = {
+  args: {},
+  parameters: {},
+};
+
+export const Single = {
+  args: {
+    type: "single",
+  },
+  parameters: {},
+};
+
+export const Multiple = {
+  args: {
+    type: "multiple",
+  },
+  parameters: {},
+};
+
+export const SingleControlled = {
+  args: {
+    value: "item1",
+    type: "single",
+  },
+  parameters: {},
+};
+
+export const MultipleControlled = {
+  args: {
+    value: ["item1", "item2"],
+    type: "multiple",
+  },
+  parameters: {},
+};

src/components/Accordion/Accordion.test.tsx

@@ -0,0 +1,156 @@
+/*
+Copyright 2023 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, it, expect, vi, afterEach } from "vitest";
+import { fireEvent, render, screen } from "@testing-library/react";
+import React from "react";
+
+import * as stories from "./Accordion.stories";
+import { composeStories, composeStory } from "@storybook/react";
+
+const { Default, Single, Multiple } = composeStories(stories);
+
+describe("<Accordion />", () => {
+  it("renders an uncontrolled single accordion by default", () => {
+    const { container } = render(<Default />);
+    expect(container).toMatchSnapshot();
+  });
+
+  it("renders an uncontrolled single accordion", () => {
+    const { container } = render(<Single />);
+    expect(container).toMatchSnapshot();
+
+    fireEvent.click(screen.getByText("Item 1"));
+
+    expect(screen.getByText("Item 1").getAttribute("data-state")).toEqual(
+      "open",
+    );
+    fireEvent.click(screen.getByText("Item 2"));
+
+    expect(screen.getByText("Item 1").getAttribute("data-state")).toEqual(
+      "closed",
+    );
+    expect(screen.getByText("Item 2").getAttribute("data-state")).toEqual(
+      "open",
+    );
+  });
+
+  it("renders an uncontrolled multiple accordion", () => {
+    const { container } = render(<Multiple />);
+    expect(container).toMatchSnapshot();
+
+    fireEvent.click(screen.getByText("Item 1"));
+    expect(screen.getByText("Item 1").getAttribute("data-state")).toEqual(
+      "open",
+    );
+
+    fireEvent.click(screen.getByText("Item 2"));
+    // both open
+    expect(screen.getByText("Item 1").getAttribute("data-state")).toEqual(
+      "open",
+    );
+    expect(screen.getByText("Item 2").getAttribute("data-state")).toEqual(
+      "open",
+    );
+  });
+
+  describe("single controlled", () => {
+    const onValueChange = vi.fn();
+    // compose the story with our mocked onValueChange
+    const SingleControlled = composeStory(
+      {
+        ...stories.SingleControlled,
+        args: {
+          ...stories.SingleControlled.args,
+          onValueChange,
+        },
+      },
+      stories.default,
+    );
+
+    afterEach(() => {
+      onValueChange.mockClear();
+    });
+
+    it("renders a controlled single accordion with an item open", () => {
+      render(<SingleControlled />);
+
+      expect(screen.getByText("Item 1").getAttribute("data-state")).toEqual(
+        "open",
+      );
+    });
+
+    it("handles click on an expanded item", () => {
+      render(<SingleControlled />);
+
+      fireEvent.click(screen.getByText("Item 1"));
+      expect(onValueChange).toHaveBeenCalledWith("");
+    });
+
+    it("handles click on a collapsed item", () => {
+      render(<SingleControlled />);
+
+      fireEvent.click(screen.getByText("Item 2"));
+      expect(onValueChange).toHaveBeenCalledWith("item2");
+    });
+  });
+
+  describe("multiple controlled", () => {
+    const onValueChange = vi.fn();
+    // compose the story with our mocked onValueChange
+    const MultipleControlled = composeStory(
+      {
+        ...stories.MultipleControlled,
+        args: {
+          ...stories.MultipleControlled.args,
+          onValueChange,
+        },
+      },
+      stories.default,
+    );
+
+    afterEach(() => {
+      onValueChange.mockClear();
+    });
+
+    it("renders a controlled single accordion with an item open", () => {
+      render(<MultipleControlled />);
+
+      expect(screen.getByText("Item 1").getAttribute("data-state")).toEqual(
+        "open",
+      );
+      expect(screen.getByText("Item 2").getAttribute("data-state")).toEqual(
+        "open",
+      );
+    });
+
+    it("handles click on an expanded item", () => {
+      render(<MultipleControlled />);
+
+      fireEvent.click(screen.getByText("Item 1"));
+      // item1 removed from array of open items
+      expect(onValueChange).toHaveBeenCalledWith(["item2"]);
+    });
+
+    it("handles click on a collapsed item", () => {
+      render(<MultipleControlled />);
+
+      fireEvent.click(screen.getByText("Item 3"));
+      // item3 added to array of open items
+      expect(onValueChange).toHaveBeenCalledWith(["item1", "item2", "item3"]);
+    });
+  });
+});