Refactor raised hand indicator and add tests.

src/reactions/RaisedHandIndicator.module.css

@@ -0,0 +1,39 @@
+.raisedHandWidget {
+  display: flex;
+  background-color: var(--cpd-color-bg-subtle-primary);
+  border-radius: var(--cpd-radius-pill-effect);
+  color: var(--cpd-color-icon-secondary);
+  border: 1px solid var(--cpd-color-yellow-1200);
+}
+
+.raisedHandWidget > p {
+  padding: var(--cpd-space-2x);
+  margin-top: auto;
+  margin-bottom: auto;
+  width: 4em;
+}
+
+.raisedHand {
+  margin: var(--cpd-space-2x);
+  padding: var(--cpd-space-2x);
+  padding-block: var(--cpd-space-2x);
+  color: var(--cpd-color-icon-secondary);
+  background-color: var(--cpd-color-icon-secondary);
+  display: flex;
+  align-items: center;
+  border-radius: var(--cpd-radius-pill-effect);
+  user-select: none;
+  overflow: hidden;
+  box-shadow: var(--small-drop-shadow);
+  box-sizing: border-box;
+  max-inline-size: 100%;
+  max-width: fit-content;
+}
+
+.raisedHand > span {
+  width: var(--cpd-space-8x);
+  height: var(--cpd-space-8x);
+  display: inline-block;
+  text-align: center;
+  font-size: 22px;
+}

src/reactions/RaisedHandIndicator.test.tsx

@@ -0,0 +1,36 @@
+/*
+Copyright 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only
+Please see LICENSE in the repository root for full details.
+*/
+
+import { describe, expect, test } from "vitest";
+import { render, configure } from "@testing-library/react";
+
+import { RaisedHandIndicator } from "./RaisedHandIndicator";
+
+configure({
+  defaultHidden: true,
+});
+
+describe("RaisedHandIndicator", () => {
+  test("renders nothing when no hand has been raised", async () => {
+    const { container } = render(<RaisedHandIndicator />);
+    expect(container.firstChild).toBeNull();
+  });
+  test("renders an indicator when a hand has been raised", async () => {
+    const dateTime = new Date();
+    const { container } = render(
+      <RaisedHandIndicator raisedHandTime={dateTime} />,
+    );
+    expect(container.firstChild).toMatchSnapshot();
+  });
+  test("renders an indicator when a hand has been raised with the expected time", async () => {
+    const dateTime = new Date(new Date().getTime() - 60000);
+    const { container } = render(
+      <RaisedHandIndicator raisedHandTime={dateTime} />,
+    );
+    expect(container.firstChild).toMatchSnapshot();
+  });
+});

src/reactions/RaisedHandIndicator.tsx

@@ -0,0 +1,44 @@
+import { useEffect, useState } from "react";
+import styles from "./RaisedHandIndicator.module.css";
+
+export function RaisedHandIndicator({
+  raisedHandTime,
+}: {
+  raisedHandTime?: Date;
+}) {
+  const [raisedHandDuration, setRaisedHandDuration] = useState("");
+
+  useEffect(() => {
+    if (!raisedHandTime) {
+      return;
+    }
+    const calculateTime = () => {
+      const totalSeconds = Math.ceil(
+        (new Date().getTime() - raisedHandTime.getTime()) / 1000,
+      );
+      const seconds = totalSeconds % 60;
+      const minutes = Math.floor(totalSeconds / 60);
+      setRaisedHandDuration(
+        `${minutes < 10 ? "0" : ""}${minutes}:${seconds < 10 ? "0" : ""}${seconds}`,
+      );
+    };
+    const to = setInterval(calculateTime, 1000);
+    calculateTime();
+    return (): void => clearInterval(to);
+  }, [setRaisedHandDuration, raisedHandTime]);
+
+  if (raisedHandTime) {
+    return (
+      <div className={styles.raisedHandWidget}>
+        <div className={styles.raisedHand}>
+          <span role="img" aria-label="raised hand">
+            ✋
+          </span>
+        </div>
+        <p>{raisedHandDuration}</p>
+      </div>
+    );
+  }
+
+  return null;
+}

src/reactions/__snapshots__/RaisedHandIndicator.test.tsx.snap

@@ -0,0 +1,41 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`RaisedHandIndicator > renders an indicator when a hand has been raised 1`] = `
+<div
+  class="raisedHandWidget"
+>
+  <div
+    class="raisedHand"
+  >
+    <span
+      aria-label="raised hand"
+      role="img"
+    >
+      ✋
+    </span>
+  </div>
+  <p>
+    00:01
+  </p>
+</div>
+`;
+
+exports[`RaisedHandIndicator > renders an indicator when a hand has been raised with the expected time 1`] = `
+<div
+  class="raisedHandWidget"
+>
+  <div
+    class="raisedHand"
+  >
+    <span
+      aria-label="raised hand"
+      role="img"
+    >
+      ✋
+    </span>
+  </div>
+  <p>
+    01:01
+  </p>
+</div>
+`;

src/tile/MediaView.module.css

@@ -90,46 +90,6 @@ unconditionally select the container so we can use cqmin units */
   place-items: start;
 }
 
-.raisedHandWidget {
-  display: flex;
-  background-color: var(--cpd-color-bg-subtle-primary);
-  border-radius: var(--cpd-radius-pill-effect);
-  color: var(--cpd-color-icon-secondary);
-  border: 1px solid var(--cpd-color-yellow-1200);
-}
-
-.raisedHandWidget > p {
-  padding: var(--cpd-space-2x);
-  margin-top: auto;
-  margin-bottom: auto;
-  width: 4em;
-}
-
-.raisedHand {
-  margin: var(--cpd-space-2x);
-  padding: var(--cpd-space-2x);
-  padding-block: var(--cpd-space-2x);
-  color: var(--cpd-color-icon-secondary);
-  background-color: var(--cpd-color-icon-secondary);
-  display: flex;
-  align-items: center;
-  border-radius: var(--cpd-radius-pill-effect);
-  user-select: none;
-  overflow: hidden;
-  box-shadow: var(--small-drop-shadow);
-  box-sizing: border-box;
-  max-inline-size: 100%;
-  max-width: fit-content;
-}
-
-.raisedHand > span {
-  width: var(--cpd-space-8x);
-  height: var(--cpd-space-8x);
-  display: inline-block;
-  text-align: center;
-  font-size: 22px;
-}
-
 .raisedHandBorder {
   border: var(--cpd-space-1x) solid var(--cpd-color-yellow-1200);
 }

src/tile/MediaView.tsx

@@ -23,6 +23,7 @@ import { ErrorIcon } from "@vector-im/compound-design-tokens/assets/web/icons";
 
 import styles from "./MediaView.module.css";
 import { Avatar } from "../Avatar";
+import { RaisedHandIndicator } from "../reactions/RaisedHandIndicator";
 
 interface Props extends ComponentProps<typeof animated.div> {
   className?: string;
@@ -64,26 +65,6 @@ export const MediaView = forwardRef<HTMLDivElement, Props>(
   ) => {
     const { t } = useTranslation();
 
-    const [raisedHandDuration, setRaisedHandDuration] = useState("");
-
-    useEffect(() => {
-      if (!raisedHandTime) {
-        return;
-      }
-      setRaisedHandDuration("00:00");
-      const to = setInterval(() => {
-        const totalSeconds = Math.ceil(
-          (new Date().getTime() - raisedHandTime.getTime()) / 1000,
-        );
-        const seconds = totalSeconds % 60;
-        const minutes = Math.floor(totalSeconds / 60);
-        setRaisedHandDuration(
-          `${minutes < 10 ? "0" : ""}${minutes}:${seconds < 10 ? "0" : ""}${seconds}`,
-        );
-      }, 1000);
-      return (): void => clearInterval(to);
-    }, [setRaisedHandDuration, raisedHandTime]);
-
     return (
       <animated.div
         className={classNames(styles.media, className, {
@@ -115,16 +96,7 @@ export const MediaView = forwardRef<HTMLDivElement, Props>(
           )}
         </div>
         <div className={styles.fg}>
-          {raisedHandTime && (
-            <div className={styles.raisedHandWidget}>
-              <div className={styles.raisedHand}>
-                <span role="img" aria-label="raised hand">
-                  ✋
-                </span>
-              </div>
-              <p>{raisedHandDuration}</p>
-            </div>
-          )}
+          <RaisedHandIndicator raisedHandTime={raisedHandTime} />
           <div className={styles.nameTag}>
             {nameTagLeadingIcon}
             <Text as="span" size="sm" weight="medium" className={styles.name}>