lix/tests/fetchurl.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

80 lines
2.6 KiB
Bash

source common.sh
clearStore
# Test fetching a flat file.
hash=$(nix-hash --flat --type sha256 ./fetchurl.sh)
outPath=$(nix-build -vvvvv --expr 'import <nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr sha256 $hash --no-out-link)
cmp $outPath fetchurl.sh
# Do not re-fetch paths already present.
outPath2=$(nix-build -vvvvv --expr 'import <nix/fetchurl.nix>' --argstr url file:///does-not-exist/must-remain-unused/fetchurl.sh --argstr sha256 $hash --no-out-link)
test "$outPath" == "$outPath2"
# Now using a base-64 hash.
clearStore
hash=$(nix hash file --type sha512 --base64 ./fetchurl.sh)
outPath=$(nix-build -vvvvv --expr 'import <nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr sha512 $hash --no-out-link)
cmp $outPath fetchurl.sh
# Now using an SRI hash.
clearStore
hash=$(nix hash file ./fetchurl.sh)
[[ $hash =~ ^sha256- ]]
outPath=$(nix-build -vvvvv --expr 'import <nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr hash $hash --no-out-link)
cmp $outPath fetchurl.sh
# Test that we can substitute from a different store dir.
clearStore
other_store=file://$TEST_ROOT/other_store?store=/fnord/store
hash=$(nix hash file --type sha256 --base16 ./fetchurl.sh)
storePath=$(nix --store $other_store store add-file ./fetchurl.sh)
outPath=$(nix-build -vvvvv --expr 'import <nix/fetchurl.nix>' --argstr url file:///no-such-dir/fetchurl.sh --argstr sha256 $hash --no-out-link --substituters $other_store)
# Test hashed mirrors with an SRI hash.
nix-build -vvvvv --expr 'import <nix/fetchurl.nix>' --argstr url file:///no-such-dir/fetchurl.sh --argstr hash $(nix hash to-sri --type sha256 $hash) \
--no-out-link --substituters $other_store
# Test unpacking a NAR.
rm -rf $TEST_ROOT/archive
mkdir -p $TEST_ROOT/archive
cp ./fetchurl.sh $TEST_ROOT/archive
chmod +x $TEST_ROOT/archive/fetchurl.sh
ln -s foo $TEST_ROOT/archive/symlink
nar=$TEST_ROOT/archive.nar
nix-store --dump $TEST_ROOT/archive > $nar
hash=$(nix-hash --flat --type sha256 $nar)
outPath=$(nix-build -vvvvv --expr 'import <nix/fetchurl.nix>' --argstr url file://$nar --argstr sha256 $hash \
--arg unpack true --argstr name xyzzy --no-out-link)
echo $outPath | grepQuiet 'xyzzy'
test -x $outPath/fetchurl.sh
test -L $outPath/symlink
nix-store --delete $outPath
# Test unpacking a compressed NAR.
narxz=$TEST_ROOT/archive.nar.xz
rm -f $narxz
xz --keep $nar
outPath=$(nix-build -vvvvv --expr 'import <nix/fetchurl.nix>' --argstr url file://$narxz --argstr sha256 $hash \
--arg unpack true --argstr name xyzzy --no-out-link)
test -x $outPath/fetchurl.sh
test -L $outPath/symlink