From f89e9df8f01ac8f0ca48df690e0b16da0093801b Mon Sep 17 00:00:00 2001
From: Eric Liu <ericyl.us@gmail.com>
Date: Thu, 20 Mar 2025 15:50:54 -0700
Subject: [PATCH] test(expandable-tile): add unit tests

---
 tests/ExpandableTile.test.svelte              |  22 ---
 .../ExpandableTile/ExpandableTile.test.svelte |  46 ++++++
 tests/ExpandableTile/ExpandableTile.test.ts   | 149 ++++++++++++++++++
 .../ExpandableTileCustom.test.svelte          |  31 ++++
 tests/setup-tests.ts                          |  37 +++++
 5 files changed, 263 insertions(+), 22 deletions(-)
 delete mode 100644 tests/ExpandableTile.test.svelte
 create mode 100644 tests/ExpandableTile/ExpandableTile.test.svelte
 create mode 100644 tests/ExpandableTile/ExpandableTile.test.ts
 create mode 100644 tests/ExpandableTile/ExpandableTileCustom.test.svelte

diff --git a/tests/ExpandableTile.test.svelte b/tests/ExpandableTile.test.svelte
deleted file mode 100644
index 53927f6d..00000000
--- a/tests/ExpandableTile.test.svelte
+++ /dev/null
@@ -1,22 +0,0 @@
-<script lang="ts">
-  import { ExpandableTile } from "carbon-components-svelte";
-</script>
-
-<ExpandableTile>
-  <div slot="above" style="height: 10rem">Above the fold content here</div>
-  <div slot="below" style="height: 10rem">Below the fold content here</div>
-</ExpandableTile>
-
-<ExpandableTile expanded>
-  <div slot="above" style="height: 10rem">Above the fold content here</div>
-  <div slot="below" style="height: 10rem">Below the fold content here</div>
-</ExpandableTile>
-
-<ExpandableTile
-  light
-  tileExpandedLabel="View less"
-  tileCollapsedLabel="View more"
->
-  <div slot="above" style="height: 10rem">Above the fold content here</div>
-  <div slot="below" style="height: 10rem">Below the fold content here</div>
-</ExpandableTile>
diff --git a/tests/ExpandableTile/ExpandableTile.test.svelte b/tests/ExpandableTile/ExpandableTile.test.svelte
new file mode 100644
index 00000000..9592038f
--- /dev/null
+++ b/tests/ExpandableTile/ExpandableTile.test.svelte
@@ -0,0 +1,46 @@
+<script lang="ts">
+  import { ExpandableTile } from "carbon-components-svelte";
+  import type { ComponentProps } from "svelte";
+
+  export let expanded: ComponentProps<ExpandableTile>["expanded"] = false;
+  export let light: ComponentProps<ExpandableTile>["light"] = false;
+  export let tileMaxHeight: ComponentProps<ExpandableTile>["tileMaxHeight"] = 0;
+  export let tilePadding: ComponentProps<ExpandableTile>["tilePadding"] = 0;
+  export let tileCollapsedIconText: ComponentProps<ExpandableTile>["tileCollapsedIconText"] =
+    "Interact to expand Tile";
+  export let tileExpandedIconText: ComponentProps<ExpandableTile>["tileExpandedIconText"] =
+    "Interact to collapse Tile";
+  export let tileExpandedLabel: ComponentProps<ExpandableTile>["tileExpandedLabel"] =
+    "";
+  export let tileCollapsedLabel: ComponentProps<ExpandableTile>["tileCollapsedLabel"] =
+    "";
+  export let tabindex: ComponentProps<ExpandableTile>["tabindex"] = "0";
+  export let id: ComponentProps<ExpandableTile>["id"] = "ccs-test";
+  export let ref: ComponentProps<ExpandableTile>["ref"] = null;
+</script>
+
+<ExpandableTile
+  bind:expanded
+  {light}
+  {tileMaxHeight}
+  {tilePadding}
+  {tileCollapsedIconText}
+  {tileExpandedIconText}
+  {tileExpandedLabel}
+  {tileCollapsedLabel}
+  {tabindex}
+  {id}
+  bind:ref
+  on:click
+  on:keypress
+  on:mouseover
+  on:mouseenter
+  on:mouseleave
+>
+  <div slot="above" data-testid="above-content">
+    Above the fold content here
+  </div>
+  <div slot="below" data-testid="below-content">
+    Below the fold content here
+  </div>
+</ExpandableTile>
diff --git a/tests/ExpandableTile/ExpandableTile.test.ts b/tests/ExpandableTile/ExpandableTile.test.ts
new file mode 100644
index 00000000..471722aa
--- /dev/null
+++ b/tests/ExpandableTile/ExpandableTile.test.ts
@@ -0,0 +1,149 @@
+import { render, screen } from "@testing-library/svelte";
+import { user } from "../setup-tests";
+import ExpandableTile from "./ExpandableTile.test.svelte";
+import ExpandableTileCustom from "./ExpandableTileCustom.test.svelte";
+
+describe("ExpandableTile", () => {
+  it("should render with default props", () => {
+    render(ExpandableTile);
+
+    const tile = screen.getByRole("button");
+    expect(tile).toBeInTheDocument();
+    expect(tile).toHaveAttribute("aria-expanded", "false");
+    expect(tile).toHaveAttribute("title", "Interact to expand Tile");
+    expect(screen.getByTestId("above-content")).toBeInTheDocument();
+    expect(screen.getByTestId("below-content")).toBeInTheDocument();
+  });
+
+  it("should handle expanded state", () => {
+    render(ExpandableTile, { props: { expanded: true } });
+
+    const tile = screen.getByRole("button");
+    expect(tile).toHaveAttribute("aria-expanded", "true");
+    expect(tile).toHaveAttribute("title", "Interact to collapse Tile");
+    expect(tile).toHaveClass("bx--tile--is-expanded");
+  });
+
+  it("should handle light variant", () => {
+    render(ExpandableTile, { props: { light: true } });
+
+    expect(screen.getByRole("button")).toHaveClass("bx--tile--light");
+  });
+
+  it("should handle custom icon text", async () => {
+    render(ExpandableTile, {
+      props: {
+        tileCollapsedIconText: "Custom collapsed text",
+        tileExpandedIconText: "Custom expanded text",
+      },
+    });
+
+    const tile = screen.getByRole("button");
+    expect(tile).toHaveAttribute("title", "Custom collapsed text");
+
+    await user.click(tile);
+    expect(tile).toHaveAttribute("title", "Custom expanded text");
+  });
+
+  it("should handle custom labels", async () => {
+    render(ExpandableTile, {
+      props: {
+        tileCollapsedLabel: "Show more",
+        tileExpandedLabel: "Show less",
+      },
+    });
+
+    expect(screen.getByText("Show more")).toBeInTheDocument();
+
+    await user.click(screen.getByRole("button"));
+    expect(screen.getByText("Show less")).toBeInTheDocument();
+  });
+
+  it("should handle custom tabindex", () => {
+    render(ExpandableTile, { props: { tabindex: "1" } });
+
+    expect(screen.getByRole("button")).toHaveAttribute("tabindex", "1");
+  });
+
+  it("should handle custom id", () => {
+    render(ExpandableTile, { props: { id: "custom-id" } });
+
+    expect(screen.getByRole("button")).toHaveAttribute("id", "custom-id");
+  });
+
+  it("should toggle expanded state on click", async () => {
+    render(ExpandableTile);
+
+    const tile = screen.getByRole("button");
+    expect(tile).toHaveAttribute("aria-expanded", "false");
+
+    await user.click(tile);
+    expect(tile).toHaveAttribute("aria-expanded", "true");
+
+    await user.click(tile);
+    expect(tile).toHaveAttribute("aria-expanded", "false");
+  });
+
+  it("should handle keyboard events", async () => {
+    render(ExpandableTile);
+
+    const tile = screen.getByRole("button");
+    await user.tab();
+    expect(tile).toHaveFocus();
+
+    await user.keyboard("{Enter}");
+    expect(tile).toHaveAttribute("aria-expanded", "true");
+
+    await user.keyboard(" ");
+    expect(tile).toHaveAttribute("aria-expanded", "false");
+  });
+
+  it("should handle interactive content without toggling", async () => {
+    render(ExpandableTileCustom);
+
+    const tileButton = screen.getAllByRole("button")[0];
+    const link = screen.getByTestId("test-link");
+    const button = screen.getByTestId("test-button");
+
+    expect(tileButton).toHaveAttribute("aria-expanded", "false");
+
+    await user.click(link);
+    expect(tileButton).toHaveAttribute("aria-expanded", "false");
+
+    await user.click(button);
+    expect(tileButton).toHaveAttribute("aria-expanded", "false");
+  });
+
+  it("should handle mouse events", async () => {
+    render(ExpandableTile);
+
+    const tile = screen.getByRole("button");
+    await user.hover(tile);
+    await user.unhover(tile);
+  });
+
+  it("should handle custom content slots", () => {
+    render(ExpandableTile);
+
+    const aboveContent = screen.getByTestId("above-content");
+    const belowContent = screen.getByTestId("below-content");
+
+    expect(aboveContent).toHaveTextContent("Above the fold content here");
+    expect(belowContent).toHaveTextContent("Below the fold content here");
+  });
+
+  it("should handle max height and padding", async () => {
+    render(ExpandableTile, {
+      props: {
+        tileMaxHeight: 200,
+        tilePadding: 20,
+      },
+    });
+
+    const tile = screen.getByRole("button");
+    expect(tile.getAttribute("style")).toBe("max-height: 105px;");
+
+    await user.click(tile);
+    expect(tile.getAttribute("style")).toBe("max-height: none;");
+  });
+});
diff --git a/tests/ExpandableTile/ExpandableTileCustom.test.svelte b/tests/ExpandableTile/ExpandableTileCustom.test.svelte
new file mode 100644
index 00000000..035b59bf
--- /dev/null
+++ b/tests/ExpandableTile/ExpandableTileCustom.test.svelte
@@ -0,0 +1,31 @@
+<script lang="ts">
+  import { ExpandableTile, Button } from "carbon-components-svelte";
+
+  export let buttonClicked = false;
+  export let linkClicked = false;
+</script>
+
+<ExpandableTile tileExpandedLabel="View less" tileCollapsedLabel="View more">
+  <div slot="above">
+    <a
+      href="/"
+      data-testid="test-link"
+      on:click|preventDefault|stopPropagation={() => {
+        linkClicked = true;
+      }}
+    >
+      Test link
+    </a>
+    <br /><br />
+    <Button
+      data-testid="test-button"
+      on:click={(e) => {
+        e.stopPropagation();
+        buttonClicked = true;
+      }}
+    >
+      Test button
+    </Button>
+  </div>
+  <div slot="below">Below the fold content here</div>
+</ExpandableTile>
diff --git a/tests/setup-tests.ts b/tests/setup-tests.ts
index c69af710..8f22aad9 100644
--- a/tests/setup-tests.ts
+++ b/tests/setup-tests.ts
@@ -6,4 +6,41 @@ import "../css/all.css";
 // Mock scrollIntoView since it's not implemented in JSDOM
 Element.prototype.scrollIntoView = vi.fn();
 
+// Mock ResizeObserver since it's not implemented in JSDOM
+class ResizeObserverMock {
+  callback: ResizeObserverCallback;
+  elements: Element[];
+
+  constructor(callback: ResizeObserverCallback) {
+    this.callback = callback;
+    this.elements = [];
+  }
+
+  observe(element: Element) {
+    this.elements.push(element);
+    this.callback(
+      [
+        {
+          target: element,
+          contentRect: { height: 100 } as DOMRectReadOnly,
+          borderBoxSize: [],
+          contentBoxSize: [],
+          devicePixelContentBoxSize: [],
+        },
+      ],
+      this,
+    );
+  }
+
+  unobserve(element: Element) {
+    this.elements = this.elements.filter((el) => el !== element);
+  }
+
+  disconnect() {
+    this.elements = [];
+  }
+}
+
+global.ResizeObserver = ResizeObserverMock;
+
 export const user = userEvent.setup();