xxhash: is TestIntegrity needed? #7616
Description
What is this purpose of this test? I see that it is copied from fnv_test.go but I find it not clear what it verifies. It looks like ensuring binary.LittleEndian.PutUint64(buf[:], val) is used. Is this important? If so then it should be explained with some comments.
Originally posted by @pellared in #7497 (comment)
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