Re: [PATCH 0/1] contrib: Add script to show uncovered "new" lines

[Ben Peart <peartben@gmail.com>]

On 9/12/2018 12:45 PM, Derrick Stolee via GitGitGadget wrote:
> We have coverage targets in our Makefile for using gcov to display line
> coverage based on our test suite. The way I like to do it is to run:
> 
> make coverage-test
> make coverage-report
> 

Very nice, I was unaware of the coverage test make targets.  I like the 
new report; it makes it easier to verify any new changes are actually 
tested.

>      
>   4. The lines in read-cache.c are part of a new block for the condition "if
>      (expand_name_field)" as part of an optimization. These lines should
>      probably be covered before that series is merged to 'next'. I understand
>      that Ben and Duy are continuing work in this direction [1].
>      

This code is only exercised when the index format is V4 but the default 
is version 2/3 [1].  To enable the test suite to use version 4 and test 
those code paths will require the addition of a new 
GIT_TEST_INDEX_VERSION environment variable.  I'll add that to my TODO list.

[1] https://git-scm.com/docs/git/2.1.0