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doc: document how to run tests

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Both `make check` and `make && yath test` are now documented ways to
run the test suite.
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Cole Helbling 2021-03-05 00:01:49 -08:00
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doc/manual/src/hacking.md
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@ -26,3 +26,21 @@ To build Hydra, you should then do:
You can run the Hydra web server in your source tree as follows:
$ ./src/script/hydra-server
You can run Hydra's test suite with the following:
[nix-shell]$ make check
[nix-shell]$ # to run as many tests as you have cores:
[nix-shell]$ make check YATH_JOB_COUNT=$NIX_BUILD_CORES
[nix-shell]$ # or run yath directly:
[nix-shell]$ yath test
[nix-shell]$ # to run as many tests as you have cores:
[nix-shell]$ yath test -j $NIX_BUILD_CORES
When using `yath` instead of `make check`, ensure you have run `make`
in the root of the repository at least once.
**Warning**: Currently, the tests can fail
if run with high parallelism [due to an issue in
`Test::PostgreSQL`](https://github.com/TJC/Test-postgresql/issues/40)
causing database ports to collide.