thodg/libgit2/tests/index

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  • Hash : 8fe33538
    Author : Patrick Steinhardt
    Date : 2017-05-19T12:45:48 

    tests: index::version: verify we write compressed index entries

While we do have a test which checks whether a written index of version
4 has the correct version set, we do not check whether this actually
enables path compression for index entries. This commit adds a new test
by adding a number of index entries with equal path prefixes to the
index and subsequently flushing that to disk. With suffix compression
enabled by index version 4, only the last few bytes of these paths will
actually have to be written to the index, saving a lot of disk space.
For the test, differences are about an order of magnitude, allowing us
to easily verify without taking a deeper look at actual on-disk
contents.

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