feat(tvix/eval): add EvalIO to public crate API r/5459

This lets users set the `io_handle` field on an `Evaluation`, which is
then propagated to the VM.

Change-Id: I616d7140724fb2b4db47c2ebf95451d5303a487a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7566
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI

1 files changed, 8 insertions, 2 deletions

diff --git a/tvix/eval/src/tests/mod.rs b/tvix/eval/src/tests/mod.rs
index 65aa12e0a0..1c872f67d2 100644
--- a/tvix/eval/src/tests/mod.rs
+++ b/tvix/eval/src/tests/mod.rs
@@ -17,7 +17,10 @@ fn eval_test(code_path: &str, expect_success: bool) {
         return;
     }
 
-    let result = crate::Evaluation::new(&code, Some(code_path.into())).evaluate();
+    let mut eval = crate::Evaluation::new(&code, Some(code_path.into()));
+    eval.io_handle = Box::new(crate::StdIO);
+
+    let result = eval.evaluate();
 
     if expect_success && !result.errors.is_empty() {
         panic!(
@@ -64,7 +67,10 @@ fn eval_test(code_path: &str, expect_success: bool) {
 fn identity(code_path: &str) {
     let code = std::fs::read_to_string(code_path).expect("should be able to read test code");
 
-    let result = crate::Evaluation::new(&code, None).evaluate();
+    let mut eval = crate::Evaluation::new(&code, None);
+    eval.io_handle = Box::new(crate::StdIO);
+
+    let result = eval.evaluate();
     assert!(
         result.errors.is_empty(),
         "evaluation of identity test failed: {:?}",