lix/tests/functional/parallel.sh
John Ericson 30dcc19d1f Put functional tests in tests/functional
I think it is bad for these reasons when `tests/` contains a mix of
functional and integration tests

 - Concepts is harder to understand, the documentation makes a good
   unit vs functional vs integration distinction, but when the
   integration tests are just two subdirs within `tests/` this is not
   clear.

 - Source filtering in the `flake.nix` is more complex. We need to
   filter out some of the dirs from `tests/`, rather than simply pick
   the dirs we want and take all of them. This is a good sign the
   structure of what we are trying to do is not matching the structure
   of the files.

With this change we have a clean:
```shell-session
$ git show 'HEAD:tests'
tree HEAD:tests

functional/
installer/
nixos/
```

(cherry picked from commit 68c81c737571794f7246db53fb4774e94fcf4b7e)
2023-12-01 12:06:43 -05:00

57 lines
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Bash

source common.sh
# First, test that -jN performs builds in parallel.
echo "testing nix-build -j..."
clearStore
rm -f $_NIX_TEST_SHARED.cur $_NIX_TEST_SHARED.max
outPath=$(nix-build -j10000 parallel.nix --no-out-link)
echo "output path is $outPath"
text=$(cat "$outPath")
if test "$text" != "abacade"; then exit 1; fi
if test "$(cat $_NIX_TEST_SHARED.cur)" != 0; then fail "wrong current process count"; fi
if test "$(cat $_NIX_TEST_SHARED.max)" != 3; then fail "not enough parallelism"; fi
# Second, test that parallel invocations of nix-build perform builds
# in parallel, and don't block waiting on locks held by the others.
echo "testing multiple nix-build -j1..."
clearStore
rm -f $_NIX_TEST_SHARED.cur $_NIX_TEST_SHARED.max
drvPath=$(nix-instantiate parallel.nix --argstr sleepTime 15)
cmd="nix-store -j1 -r $drvPath"
$cmd &
pid1=$!
echo "pid 1 is $pid1"
$cmd &
pid2=$!
echo "pid 2 is $pid2"
$cmd &
pid3=$!
echo "pid 3 is $pid3"
$cmd &
pid4=$!
echo "pid 4 is $pid4"
wait $pid1 || fail "instance 1 failed: $?"
wait $pid2 || fail "instance 2 failed: $?"
wait $pid3 || fail "instance 3 failed: $?"
wait $pid4 || fail "instance 4 failed: $?"
if test "$(cat $_NIX_TEST_SHARED.cur)" != 0; then fail "wrong current process count"; fi
if test "$(cat $_NIX_TEST_SHARED.max)" != 3; then fail "not enough parallelism"; fi