Nix/tests/functional/function-trace.sh
John Ericson 68c81c7375 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/
```
2023-10-06 09:05:56 -04:00

68 lines
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Executable file

source common.sh
set +x
expect_trace() {
expr="$1"
expect="$2"
actual=$(
nix-instantiate \
--trace-function-calls \
--expr "$expr" 2>&1 \
| grep "function-trace" \
| sed -e 's/ [0-9]*$//' \
|| true
)
echo -n "Tracing expression '$expr'"
msg=$(diff -swB \
<(echo "$expect") \
<(echo "$actual")
) && result=0 || result=$?
if [ $result -eq 0 ]; then
echo " ok."
else
echo " failed. difference:"
echo "$msg"
return $result
fi
}
# failure inside a tryEval
expect_trace 'builtins.tryEval (throw "example")' "
function-trace entered «string»:1:1 at
function-trace entered «string»:1:19 at
function-trace exited «string»:1:19 at
function-trace exited «string»:1:1 at
"
# Missing argument to a formal function
expect_trace '({ x }: x) { }' "
function-trace entered «string»:1:1 at
function-trace exited «string»:1:1 at
"
# Too many arguments to a formal function
expect_trace '({ x }: x) { x = "x"; y = "y"; }' "
function-trace entered «string»:1:1 at
function-trace exited «string»:1:1 at
"
# Not enough arguments to a lambda
expect_trace '(x: y: x + y) 1' "
function-trace entered «string»:1:1 at
function-trace exited «string»:1:1 at
"
# Too many arguments to a lambda
expect_trace '(x: x) 1 2' "
function-trace entered «string»:1:1 at
function-trace exited «string»:1:1 at
"
# Not a function
expect_trace '1 2' "
function-trace entered «string»:1:1 at
function-trace exited «string»:1:1 at
"