### Question:
B2PartSizes implements B2FilePolicy { static B2PartSizes from(B2AccountAuthorization auth) { return new B2PartSizes( auth.getAbsoluteMinimumPartSize(), auth.getRecommendedPartSize() ); } private  B2PartSizes(long minimumPartSize,
                long recommendedPartSize); @Override boolean mustBeLargeFile(long contentLength); @Override boolean couldBeLargeFile(long contentLength); @Override boolean shouldBeLargeFile(long contentLength);  }### Answer:
@Test public void testFrom() { assertEquals(accountAuth.getAbsoluteMinimumPartSize(), partSizes.getMinimumPartSize()); assertEquals(accountAuth.getRecommendedPartSize(), partSizes.getRecommendedPartSize()); }