nix/tests/export-graph.sh
John Ericson c11836126b Harden tests' bash
Use `set -u` and `set -o pipefail` to catch accidental mistakes and
failures more strongly.

 - `set -u` catches the use of undefined variables
 - `set -o pipefail` catches failures (like `set -e`) earlier in the
   pipeline.

This makes the tests a bit more robust. It is nice to read code not
worrying about these spurious success paths (via uncaught) errors
undermining the tests. Indeed, I caught some bugs doing this.

There are a few tests where we run a command that should fail, and then
search its output to make sure the failure message is one that we
expect. Before, since the `grep` was the last command in the pipeline
the exit code of those failing programs was silently ignored. Now with
`set -o pipefail` it won't be, and we have to do something so the
expected failure doesn't accidentally fail the test.

To do that we use `expect` and a new `expectStderr` to check for the
exact failing exit code. See the comments on each for why.

`grep -q` is replaced with `grepQuiet`, see the comments on that
function for why.

`grep -v` when we just want the exit code is replaced with `grepInverse,
see the comments on that function for why.

`grep -q -v` together is, surprise surprise, replaced with
`grepQuietInverse`, which is both combined.

Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
2023-03-08 10:26:30 -05:00

31 lines
779 B
Bash

source common.sh
clearStore
clearProfiles
checkRef() {
nix-store -q --references $TEST_ROOT/result | grepQuiet "$1"'$' || fail "missing reference $1"
}
# Test the export of the runtime dependency graph.
outPath=$(nix-build ./export-graph.nix -A 'foo."bar.runtimeGraph"' -o $TEST_ROOT/result)
test $(nix-store -q --references $TEST_ROOT/result | wc -l) = 3 || fail "bad nr of references"
checkRef input-2
for i in $(cat $outPath); do checkRef $i; done
# Test the export of the build-time dependency graph.
nix-store --gc # should force rebuild of input-1
outPath=$(nix-build ./export-graph.nix -A 'foo."bar.buildGraph"' -o $TEST_ROOT/result)
checkRef input-1
checkRef input-1.drv
checkRef input-2
checkRef input-2.drv
for i in $(cat $outPath); do checkRef $i; done