Re: [PATCH 00/10] Hash-independent tests (part 1)

> This is a series to make our tests hash-independent.  Many tests have
> hard-coded SHA-1 values in them, and it would be valuable to express
> these items in a hash-independent way for our hash transitions.
> 
> The approach in this series relies on only three components for hash
> independence: git rev-parse, git hash-object, and EMPTY_BLOB and
> EMPTY_TREE.  Because many of our shell scripts and test components
> already rely on the first two, this seems like a safe assumption.
> 
> For the same reason, this series avoids modifying tests that test these
> components or their expected SHA-1 values.  I expect that when we add
> another hash function, we'll copy these tests to expose both SHA-1 and
> NewHash versions.
> 
> Many of our tests use heredocs for defining expected values.  My
> approach has been to interpolate values into the heredocs, as that
> produces the best readability in my view.
> 
> These tests have been tested using my "short BLAKE2b" series (branch
> blake2b-test-hash) and have also been tested based off master.
> 
> Comments on any aspect of this series are welcome, but opinions on the
> approach or style are especially so.