nix-super/tests/db-migration.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

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# Test that we can successfully migrate from an older db schema
# Only run this if we have an older Nix available
# XXX: This assumes that the `daemon` package is older than the `client` one
if [[ -z "${NIX_DAEMON_PACKAGE-}" ]]; then
exit 99
fi
source common.sh
killDaemon
# Fill the db using the older Nix
PATH_WITH_NEW_NIX="$PATH"
export PATH="${NIX_DAEMON_PACKAGE}/bin:$PATH"
clearStore
nix-build simple.nix --no-out-link
nix-store --generate-binary-cache-key cache1.example.org $TEST_ROOT/sk1 $TEST_ROOT/pk1
dependenciesOutPath=$(nix-build dependencies.nix --no-out-link --secret-key-files "$TEST_ROOT/sk1")
fixedOutPath=$(IMPURE_VAR1=foo IMPURE_VAR2=bar nix-build fixed.nix -A good.0 --no-out-link)
# Migrate to the new schema and ensure that everything's there
export PATH="$PATH_WITH_NEW_NIX"
info=$(nix path-info --json $dependenciesOutPath)
[[ $info =~ '"ultimate":true' ]]
[[ $info =~ 'cache1.example.org' ]]
nix verify -r "$fixedOutPath"
nix verify -r "$dependenciesOutPath" --sigs-needed 1 --trusted-public-keys $(cat $TEST_ROOT/pk1)