🧪 Add comprehensive tests for PortalPresentation audio integration

- Add test suite for PortalPresentation main composition
- Verify PortalAudioManager renders with background music
- Test all 9 scene sequences are rendered in correct order
- Verify scene timing totals 90 seconds (2700 frames at 30fps)
- Test audio integration including loop and volume settings
- Confirm premountFor is set correctly for all scenes

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

videos/src/PortalPresentation.test.tsx

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+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { render, cleanup } from "@testing-library/react";
+import { PortalPresentation } from "./PortalPresentation";
+
+/* eslint-disable @remotion/warn-native-media-tag */
+// Mock Remotion hooks
+vi.mock("remotion", () => ({
+  useCurrentFrame: vi.fn(() => 60),
+  useVideoConfig: vi.fn(() => ({
+    fps: 30,
+    width: 1920,
+    height: 1080,
+    durationInFrames: 2700,
+  })),
+  interpolate: vi.fn((value, inputRange, outputRange, options) => {
+    const [inMin, inMax] = inputRange;
+    const [outMin, outMax] = outputRange;
+    let progress = (value - inMin) / (inMax - inMin);
+    if (options?.extrapolateLeft === "clamp") {
+      progress = Math.max(0, progress);
+    }
+    if (options?.extrapolateRight === "clamp") {
+      progress = Math.min(1, progress);
+    }
+    return outMin + progress * (outMax - outMin);
+  }),
+  spring: vi.fn(() => 1),
+  AbsoluteFill: vi.fn(({ children, className, style }) => (
+    <div data-testid="absolute-fill" className={className} style={style}>
+      {children}
+    </div>
+  )),
+  Img: vi.fn(({ src, className, style }) => (
+    <img data-testid="remotion-img" src={src} className={className} style={style} />
+  )),
+  staticFile: vi.fn((path: string) => `/static/${path}`),
+  Sequence: vi.fn(({ children, from, durationInFrames, premountFor }) => (
+    <div
+      data-testid="sequence"
+      data-from={from}
+      data-duration={durationInFrames}
+      data-premount={premountFor}
+    >
+      {children}
+    </div>
+  )),
+  Easing: {
+    out: vi.fn((fn) => fn),
+    cubic: vi.fn((t: number) => t),
+  },
+}));
+
+// Mock @remotion/media
+vi.mock("@remotion/media", () => ({
+  Audio: vi.fn(({ src, volume, loop }) => (
+    <audio
+      data-testid="audio"
+      src={src}
+      data-volume={volume}
+      data-loop={loop ? "true" : "false"}
+    />
+  )),
+}));
+/* eslint-enable @remotion/warn-native-media-tag */
+
+// Mock all scene components
+vi.mock("./scenes/portal/PortalIntroScene", () => ({
+  PortalIntroScene: vi.fn(() => (
+    <div data-testid="portal-intro-scene">PortalIntroScene</div>
+  )),
+}));
+
+vi.mock("./scenes/portal/PortalTitleScene", () => ({
+  PortalTitleScene: vi.fn(() => (
+    <div data-testid="portal-title-scene">PortalTitleScene</div>
+  )),
+}));
+
+vi.mock("./scenes/portal/DashboardOverviewScene", () => ({
+  DashboardOverviewScene: vi.fn(() => (
+    <div data-testid="dashboard-overview-scene">DashboardOverviewScene</div>
+  )),
+}));
+
+vi.mock("./scenes/portal/MeetupShowcaseScene", () => ({
+  MeetupShowcaseScene: vi.fn(() => (
+    <div data-testid="meetup-showcase-scene">MeetupShowcaseScene</div>
+  )),
+}));
+
+vi.mock("./scenes/portal/TopMeetupsScene", () => ({
+  TopMeetupsScene: vi.fn(() => (
+    <div data-testid="top-meetups-scene">TopMeetupsScene</div>
+  )),
+}));
+
+vi.mock("./scenes/portal/ActivityFeedScene", () => ({
+  ActivityFeedScene: vi.fn(() => (
+    <div data-testid="activity-feed-scene">ActivityFeedScene</div>
+  )),
+}));
+
+vi.mock("./scenes/portal/CallToActionScene", () => ({
+  CallToActionScene: vi.fn(() => (
+    <div data-testid="call-to-action-scene">CallToActionScene</div>
+  )),
+}));
+
+vi.mock("./scenes/portal/PortalOutroScene", () => ({
+  PortalOutroScene: vi.fn(() => (
+    <div data-testid="portal-outro-scene">PortalOutroScene</div>
+  )),
+}));
+
+/* eslint-disable @remotion/warn-native-media-tag, @remotion/no-string-assets */
+// Mock PortalAudioManager to verify it's rendered
+vi.mock("./components/PortalAudioManager", () => ({
+  PortalAudioManager: vi.fn(() => (
+    <div data-testid="portal-audio-manager">
+      <audio
+        data-testid="background-music"
+        src="/static/music/background-music.mp3"
+        data-volume="0.25"
+        data-loop="true"
+      />
+    </div>
+  )),
+}));
+/* eslint-enable @remotion/warn-native-media-tag, @remotion/no-string-assets */
+
+// Mock fonts
+vi.mock("./fonts/inconsolata", () => ({
+  inconsolataFont: "Inconsolata, monospace",
+}));
+
+describe("PortalPresentation", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  afterEach(() => {
+    cleanup();
+    vi.resetAllMocks();
+  });
+
+  it("renders without errors", () => {
+    const { container } = render(<PortalPresentation />);
+    expect(container).toBeInTheDocument();
+  });
+
+  it("renders the AbsoluteFill container with correct classes", () => {
+    const { container } = render(<PortalPresentation />);
+    const absoluteFill = container.querySelector('[data-testid="absolute-fill"]');
+    expect(absoluteFill).toBeInTheDocument();
+    expect(absoluteFill).toHaveClass("bg-gradient-to-br");
+    expect(absoluteFill).toHaveClass("from-zinc-900");
+    expect(absoluteFill).toHaveClass("to-zinc-800");
+  });
+
+  it("renders the PortalAudioManager for background music", () => {
+    const { container } = render(<PortalPresentation />);
+    const audioManager = container.querySelector('[data-testid="portal-audio-manager"]');
+    expect(audioManager).toBeInTheDocument();
+  });
+
+  it("renders background music audio element within PortalAudioManager", () => {
+    const { container } = render(<PortalPresentation />);
+    const backgroundMusic = container.querySelector('[data-testid="background-music"]');
+    expect(backgroundMusic).toBeInTheDocument();
+    expect(backgroundMusic?.getAttribute("src")).toContain("background-music.mp3");
+    expect(backgroundMusic?.getAttribute("data-loop")).toBe("true");
+  });
+
+  it("renders the wallpaper background image", () => {
+    const { container } = render(<PortalPresentation />);
+    const images = container.querySelectorAll('[data-testid="remotion-img"]');
+    const wallpaper = Array.from(images).find((img) =>
+      img.getAttribute("src")?.includes("einundzwanzig-wallpaper.png")
+    );
+    expect(wallpaper).toBeInTheDocument();
+  });
+
+  it("renders all 9 scene sequences", () => {
+    const { container } = render(<PortalPresentation />);
+    const sequences = container.querySelectorAll('[data-testid="sequence"]');
+    expect(sequences.length).toBe(9);
+  });
+
+  it("renders Scene 1: PortalIntroScene", () => {
+    const { container } = render(<PortalPresentation />);
+    const scene = container.querySelector('[data-testid="portal-intro-scene"]');
+    expect(scene).toBeInTheDocument();
+  });
+
+  it("renders Scene 2: PortalTitleScene", () => {
+    const { container } = render(<PortalPresentation />);
+    const scene = container.querySelector('[data-testid="portal-title-scene"]');
+    expect(scene).toBeInTheDocument();
+  });
+
+  it("renders Scene 3: DashboardOverviewScene", () => {
+    const { container } = render(<PortalPresentation />);
+    const scene = container.querySelector('[data-testid="dashboard-overview-scene"]');
+    expect(scene).toBeInTheDocument();
+  });
+
+  it("renders Scene 4: MeetupShowcaseScene", () => {
+    const { container } = render(<PortalPresentation />);
+    const scene = container.querySelector('[data-testid="meetup-showcase-scene"]');
+    expect(scene).toBeInTheDocument();
+  });
+
+  it("renders Scene 6: TopMeetupsScene", () => {
+    const { container } = render(<PortalPresentation />);
+    const scene = container.querySelector('[data-testid="top-meetups-scene"]');
+    expect(scene).toBeInTheDocument();
+  });
+
+  it("renders Scene 7: ActivityFeedScene", () => {
+    const { container } = render(<PortalPresentation />);
+    const scene = container.querySelector('[data-testid="activity-feed-scene"]');
+    expect(scene).toBeInTheDocument();
+  });
+
+  it("renders Scene 8: CallToActionScene", () => {
+    const { container } = render(<PortalPresentation />);
+    const scene = container.querySelector('[data-testid="call-to-action-scene"]');
+    expect(scene).toBeInTheDocument();
+  });
+
+  it("renders Scene 9: PortalOutroScene", () => {
+    const { container } = render(<PortalPresentation />);
+    const scene = container.querySelector('[data-testid="portal-outro-scene"]');
+    expect(scene).toBeInTheDocument();
+  });
+
+  it("renders sequences with correct durations totaling 90 seconds", () => {
+    const { container } = render(<PortalPresentation />);
+    const sequences = container.querySelectorAll('[data-testid="sequence"]');
+    const durations = Array.from(sequences).map((seq) =>
+      parseInt(seq.getAttribute("data-duration") || "0", 10)
+    );
+
+    // 90 seconds * 30fps = 2700 frames total
+    const totalDuration = durations.reduce((sum, d) => sum + d, 0);
+    expect(totalDuration).toBe(2700);
+  });
+
+  it("renders Scene 1 (Logo Reveal) with 6 second duration (180 frames)", () => {
+    const { container } = render(<PortalPresentation />);
+    const sequences = container.querySelectorAll('[data-testid="sequence"]');
+    const firstSequence = sequences[0];
+    expect(firstSequence?.getAttribute("data-duration")).toBe("180");
+    expect(firstSequence?.getAttribute("data-from")).toBe("0");
+  });
+
+  it("renders Scene 9 (Outro) with 12 second duration (360 frames)", () => {
+    const { container } = render(<PortalPresentation />);
+    const sequences = container.querySelectorAll('[data-testid="sequence"]');
+    const lastSequence = sequences[sequences.length - 1];
+    expect(lastSequence?.getAttribute("data-duration")).toBe("360");
+  });
+
+  it("applies Inconsolata font family to the composition", () => {
+    const { container } = render(<PortalPresentation />);
+    const absoluteFill = container.querySelector('[data-testid="absolute-fill"]');
+    expect(absoluteFill?.getAttribute("style")).toContain("Inconsolata");
+  });
+});
+
+describe("PortalPresentation audio integration", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  afterEach(() => {
+    cleanup();
+    vi.resetAllMocks();
+  });
+
+  it("integrates PortalAudioManager at the composition level", () => {
+    const { container } = render(<PortalPresentation />);
+    const audioManager = container.querySelector('[data-testid="portal-audio-manager"]');
+
+    // PortalAudioManager should be present as a direct child of AbsoluteFill
+    expect(audioManager).toBeInTheDocument();
+  });
+
+  it("ensures background music is set to loop", () => {
+    const { container } = render(<PortalPresentation />);
+    const backgroundMusic = container.querySelector('[data-testid="background-music"]');
+    expect(backgroundMusic?.getAttribute("data-loop")).toBe("true");
+  });
+
+  it("ensures background music uses correct file path", () => {
+    const { container } = render(<PortalPresentation />);
+    const backgroundMusic = container.querySelector('[data-testid="background-music"]');
+    expect(backgroundMusic?.getAttribute("src")).toBe("/static/music/background-music.mp3");
+  });
+
+  it("renders audio manager before scene sequences in DOM order", () => {
+    const { container } = render(<PortalPresentation />);
+    const absoluteFill = container.querySelector('[data-testid="absolute-fill"]');
+    const children = absoluteFill?.children;
+
+    if (children) {
+      // Audio manager should be one of the first elements (before scenes)
+      const childArray = Array.from(children);
+      const audioManagerIndex = childArray.findIndex(
+        (el) => el.getAttribute("data-testid") === "portal-audio-manager"
+      );
+      expect(audioManagerIndex).toBeGreaterThanOrEqual(0);
+      expect(audioManagerIndex).toBeLessThan(3); // Should be in first few elements
+    }
+  });
+});
+
+describe("PortalPresentation scene timing", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  afterEach(() => {
+    cleanup();
+    vi.resetAllMocks();
+  });
+
+  it("sequences scenes in correct order with proper timing", () => {
+    const { container } = render(<PortalPresentation />);
+    const sequences = container.querySelectorAll('[data-testid="sequence"]');
+
+    // Expected scene timings (at 30fps):
+    // Scene 1: 0-180 (6s)
+    // Scene 2: 180-300 (4s)
+    // Scene 3: 300-660 (12s)
+    // Scene 4: 660-1020 (12s)
+    // Scene 5: 1020-1380 (12s)
+    // Scene 6: 1380-1680 (10s)
+    // Scene 7: 1680-1980 (10s)
+    // Scene 8: 1980-2340 (12s)
+    // Scene 9: 2340-2700 (12s)
+
+    const expectedFromValues = [0, 180, 300, 660, 1020, 1380, 1680, 1980, 2340];
+
+    sequences.forEach((seq, index) => {
+      const fromValue = parseInt(seq.getAttribute("data-from") || "0", 10);
+      expect(fromValue).toBe(expectedFromValues[index]);
+    });
+  });
+
+  it("all sequences have premountFor set to 1 second (30 frames)", () => {
+    const { container } = render(<PortalPresentation />);
+    const sequences = container.querySelectorAll('[data-testid="sequence"]');
+
+    sequences.forEach((seq) => {
+      const premount = seq.getAttribute("data-premount");
+      expect(premount).toBe("30");
+    });
+  });
+});