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lix/tests/functional/lang-test-infra.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

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# Test the function for lang.sh
source common.sh
source lang/framework.sh
# We are testing this, so don't want outside world to affect us.
unset _NIX_TEST_ACCEPT
# We'll only modify this in subshells so we don't need to reset it.
badDiff=0
# matches non-empty
echo Hi! > "$TEST_ROOT/got"
cp "$TEST_ROOT/got" "$TEST_ROOT/expected"
(
diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/expected"
(( "$badDiff" == 0 ))
)
# matches empty, non-existant file is the same as empty file
echo -n > "$TEST_ROOT/got"
(
diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/does-not-exist"
(( "$badDiff" == 0 ))
)
# doesn't matches non-empty, non-existant file is the same as empty file
echo Hi! > "$TEST_ROOT/got"
(
diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/does-not-exist"
(( "$badDiff" == 1 ))
)
# doesn't match, `badDiff` set, file unchanged
echo Hi! > "$TEST_ROOT/got"
echo Bye! > "$TEST_ROOT/expected"
(
diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/expected"
(( "$badDiff" == 1 ))
)
[[ "$(echo Bye! )" == $(< "$TEST_ROOT/expected") ]]
# _NIX_TEST_ACCEPT=1 matches non-empty
echo Hi! > "$TEST_ROOT/got"
cp "$TEST_ROOT/got" "$TEST_ROOT/expected"
(
_NIX_TEST_ACCEPT=1 diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/expected"
(( "$badDiff" == 0 ))
)
# _NIX_TEST_ACCEPT doesn't match, `badDiff=1` set, file changed (was previously non-empty)
echo Hi! > "$TEST_ROOT/got"
echo Bye! > "$TEST_ROOT/expected"
(
_NIX_TEST_ACCEPT=1 diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/expected"
(( "$badDiff" == 1 ))
)
[[ "$(echo Hi! )" == $(< "$TEST_ROOT/expected") ]]
# second time succeeds
(
diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/expected"
(( "$badDiff" == 0 ))
)
# _NIX_TEST_ACCEPT matches empty, non-existant file not created
echo -n > "$TEST_ROOT/got"
(
_NIX_TEST_ACCEPT=1 diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/does-not-exists"
(( "$badDiff" == 0 ))
)
[[ ! -f "$TEST_ROOT/does-not-exist" ]]
# _NIX_TEST_ACCEPT doesn't match, output empty, file deleted
echo -n > "$TEST_ROOT/got"
echo Bye! > "$TEST_ROOT/expected"
badDiff=0
(
_NIX_TEST_ACCEPT=1 diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/expected"
(( "$badDiff" == 1 ))
)
[[ ! -f "$TEST_ROOT/expected" ]]
# second time succeeds
(
diffAndAcceptInner test "$TEST_ROOT/got" "$TEST_ROOT/expected"
(( "$badDiff" == 0 ))
)