![John Ericson](/assets/img/avatar_default.png)
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>
67 lines
1.4 KiB
Bash
67 lines
1.4 KiB
Bash
source ./common.sh
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flake1Dir=$TEST_ROOT/flake1
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flake2Dir=$TEST_ROOT/flake2
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mkdir -p $flake1Dir $flake2Dir
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writeSimpleFlake $flake2Dir
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tar cfz $TEST_ROOT/flake.tar.gz -C $TEST_ROOT flake2
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hash=$(nix hash path $flake2Dir)
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dep=$(nix store add-path ./common.sh)
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cat > $flake1Dir/flake.nix <<EOF
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{
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inputs.flake2.url = "file://$TEST_ROOT/flake.tar.gz";
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outputs = { self, flake2 }: {
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a1 = builtins.fetchTarball {
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#type = "tarball";
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url = "file://$TEST_ROOT/flake.tar.gz";
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sha256 = "$hash";
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};
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a2 = ./foo;
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a3 = ./.;
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a4 = self.outPath;
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# FIXME
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a5 = self;
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a6 = flake2.outPath;
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# FIXME
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a7 = "\${flake2}/config.nix";
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# This is only allowed in impure mode.
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a8 = builtins.storePath $dep;
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a9 = "$dep";
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};
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}
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EOF
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echo bar > $flake1Dir/foo
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nix build --json --out-link $TEST_ROOT/result $flake1Dir#a1
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[[ -e $TEST_ROOT/result/simple.nix ]]
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nix build --json --out-link $TEST_ROOT/result $flake1Dir#a2
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[[ $(cat $TEST_ROOT/result) = bar ]]
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nix build --json --out-link $TEST_ROOT/result $flake1Dir#a3
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nix build --json --out-link $TEST_ROOT/result $flake1Dir#a4
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nix build --json --out-link $TEST_ROOT/result $flake1Dir#a6
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[[ -e $TEST_ROOT/result/simple.nix ]]
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nix build --impure --json --out-link $TEST_ROOT/result $flake1Dir#a8
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diff common.sh $TEST_ROOT/result
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(! nix build --impure --json --out-link $TEST_ROOT/result $flake1Dir#a9)
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