Class TestPreviewAdapter

packages/sdk/src/session.test.ts:17–58

`.trim();

class TestPreviewAdapter implements PreviewAdapter {
  private selectionHandlers: Array<(ids: string[]) => void> = [];

  // fallow-ignore-next-line code-duplication
  elementAtPoint(_x: number, _y: number, _opts?: { atTime?: number }): ElementAtPointResult | null {
    return null;
  }

  applyDraft(_id: string, _props: DraftProps): void {
    // Test adapter tracks selection only.
  }

  commitPreview(): void {
    // Test adapter tracks selection only.
  }

  cancelPreview(): void {
    // Test adapter tracks selection only.
  }

  select(ids: string[], _opts?: { additive?: boolean }): void {
    this.emitSelection(ids);
  }

  on(_event: "selection", handler: (ids: string[]) => void): () => void {
    this.selectionHandlers.push(handler);
    return () => {
      this.selectionHandlers = this.selectionHandlers.filter((h) => h !== handler);
    };
  }

  emitSelection(ids: readonly string[]): void {
    const snapshot = [...ids];
    for (const handler of this.selectionHandlers) {
      handler([...snapshot]);
    }
  }

  listenerCount(): number {
    return this.selectionHandlers.length;
  }
}

// ─── Preview selection bridge ────────────────────────────────────────────────