@Test
  public void testJpegFallback() throws Throwable {
    final Bitmap bitmap = mWebpBitmapFactory.decodeStream(getTestJpegInputStream(), null, null);

    // NULLSAFE_FIXME[Parameter Not Nullable]
    assertNotNull("Bitmap should not be null", bitmap);
    assertEquals(
        "Width should be decoded properly", 20, Preconditions.checkNotNull(bitmap).getWidth());
    assertEquals("Height should be decoded properly", 20, bitmap.getHeight());

    assertEquals("Bitmap pixels should be red", 0xFFFF0100, bitmap.getPixel(5, 8));
  }
Return input stream for lossless webp

@return InputStream instance
static-webp/src/androidTest/java/com/facebook/webpsupport/WebpBitmapFactoryTest.java