feat(tvix/eval): enable the XFAIL tests r/5123

This commit adds support for running the "expected failure" tests in
both the nix and tvix test suites.

I have disabled the eval-fail-blackhole.nix test because it gets
stuck running forever.

Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: Iba75ce6c8f2becab3c834fcfdd9f4fdc5a4bdb9f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6990
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: grfn <grfn@gws.fyi>

1 files changed, 5 insertions, 0 deletions

diff --git a/tvix/eval/src/tests/nix_tests/eval-fail-blackhole.nix-disabled b/tvix/eval/src/tests/nix_tests/eval-fail-blackhole.nix-disabled
new file mode 100644
index 000000000000..81133b511c95
--- /dev/null
+++ b/tvix/eval/src/tests/nix_tests/eval-fail-blackhole.nix-disabled
@@ -0,0 +1,5 @@
+let {
+  body = x;
+  x = y;
+  y = x;
+}