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use std::{rc::Rc, sync::Arc};
use pretty_assertions::assert_eq;
use std::path::PathBuf;
use tvix_build::buildservice::DummyBuildService;
use tvix_castore::{
blobservice::{BlobService, MemoryBlobService},
directoryservice::{DirectoryService, MemoryDirectoryService},
};
use tvix_eval::{EvalIO, Value};
use tvix_store::pathinfoservice::{MemoryPathInfoService, PathInfoService};
use rstest::rstest;
use crate::{
builtins::{add_derivation_builtins, add_fetcher_builtins, add_import_builtins},
configure_nix_path,
tvix_io::TvixIO,
tvix_store_io::TvixStoreIO,
};
fn eval_test(code_path: PathBuf, expect_success: bool) {
assert_eq!(
code_path.extension().unwrap(),
"nix",
"test files always end in .nix"
);
let exp_path = code_path.with_extension("exp");
let exp_xml_path = code_path.with_extension("exp.xml");
let code = std::fs::read_to_string(&code_path).expect("should be able to read test code");
if exp_xml_path.exists() {
// We can't test them at the moment because we don't have XML output yet.
// Checking for success / failure only is a bit disingenious.
return;
}
let blob_service = Arc::new(MemoryBlobService::default()) as Arc<dyn BlobService>;
let directory_service =
Arc::new(MemoryDirectoryService::default()) as Arc<dyn DirectoryService>;
let path_info_service = Box::new(MemoryPathInfoService::new(
blob_service.clone(),
directory_service.clone(),
)) as Box<dyn PathInfoService>;
let tokio_runtime = tokio::runtime::Runtime::new().unwrap();
let tvix_store_io = Rc::new(TvixStoreIO::new(
blob_service,
directory_service,
path_info_service.into(),
Arc::new(DummyBuildService::default()),
tokio_runtime.handle().clone(),
));
// Wrap with TvixIO, so <nix/fetchurl.nix can be imported.
let mut eval = tvix_eval::Evaluation::new(
Box::new(TvixIO::new(tvix_store_io.clone() as Rc<dyn EvalIO>)) as Box<dyn EvalIO>,
true,
);
eval.strict = true;
add_derivation_builtins(&mut eval, tvix_store_io.clone());
add_fetcher_builtins(&mut eval, tvix_store_io.clone());
add_import_builtins(&mut eval, tvix_store_io.clone());
configure_nix_path(&mut eval, &None);
let result = eval.evaluate(code, Some(code_path.clone()));
let failed = match result.value {
Some(Value::Catchable(_)) => true,
_ => !result.errors.is_empty(),
};
if expect_success && failed {
panic!(
"{}: evaluation of eval-okay test should succeed, but failed with {:?}",
code_path.display(),
result.errors,
);
}
if !expect_success && failed {
return;
}
let value = result.value.unwrap();
let result_str = value.to_string();
if let Ok(exp) = std::fs::read_to_string(exp_path) {
if expect_success {
assert_eq!(
result_str,
exp.trim(),
"{}: result value representation (left) must match expectation (right)",
code_path.display()
);
} else {
assert_ne!(
result_str,
exp.trim(),
"{}: test passed unexpectedly! consider moving it out of notyetpassing",
code_path.display()
);
}
} else if expect_success {
panic!(
"{}: should be able to read test expectation",
code_path.display()
);
} else {
panic!(
"{}: test should have failed, but succeeded with output {}",
code_path.display(),
result_str
);
}
}
// eval-okay-* tests contain a snippet of Nix code, and an expectation
// of the produced string output of the evaluator.
//
// These evaluations are always supposed to succeed, i.e. all snippets
// are guaranteed to be valid Nix code.
#[rstest]
fn eval_okay(#[files("src/tests/tvix_tests/eval-okay-*.nix")] code_path: PathBuf) {
eval_test(code_path, true)
}
// eval-okay-* tests from the original Nix test suite.
#[cfg(feature = "nix_tests")]
#[rstest]
fn nix_eval_okay(#[files("src/tests/nix_tests/eval-okay-*.nix")] code_path: PathBuf) {
eval_test(code_path, true)
}
// eval-okay-* tests from the original Nix test suite which do not yet pass for tvix
//
// Eventually there will be none of these left, and this function
// will disappear :) Until then, to run these tests, use `cargo test
// --features expected_failures`.
//
// Please don't submit failing tests unless they're in
// notyetpassing; this makes the test suite much more useful for
// regression testing, since there should always be zero non-ignored
// failing tests.
//
// NOTE: There's no such test anymore. `rstest` does not handle empty directories, so, we
// just comment it for now.
//
// #[rstest]
// fn nix_eval_okay_currently_failing(
// #[files("src/tests/nix_tests/notyetpassing/eval-okay-*.nix")] code_path: PathBuf,
// ) {
// eval_test(code_path, false)
// }
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