feat: implement UnableToCaptureScreenException in browsingContext.c…

…aptureScreenshot (#1236)

Spec:
https://w3c.github.io/webdriver-bidi/#:~:text=If%20rect%E2%80%99s%20width%20dimension%20is%200%20or%20rect%E2%80%99s%20height%20dimension%20is%200%2C%20return%20error%20with%20error%20code%20unable%20to%20capture%20screen.

src/bidiMapper/domains/context/BrowsingContextImpl.ts

@@ -739,11 +739,19 @@ export class BrowsingContextImpl {
 
     rect = rect ? getIntersectionRect(rect, viewport) : viewport;
 
+    if (rect.width === 0 || rect.height === 0) {
+      throw new UnableToCaptureScreenException(
+        `Unable to capture screenshot with zero dimensions: width=${rect.width}, height=${rect.height}`
+      );
+    }
+
     const result = await this.#cdpTarget.cdpClient.sendCommand(
       'Page.captureScreenshot',
       {clip: {...rect, scale: 1.0}}
     );
-    return {data: result.data};
+    return {
+      data: result.data,
+    };
   }
 
   async print(