test(tvix/store/pathinfo): add more tests for references r/6707

This should cover all error cases produced.

Change-Id: If31816d9b087551d86d7913df55df8f9f44bb554
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9546
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: edef <edef@edef.eu>
Tested-by: BuildkiteCI

2 files changed, 101 insertions, 42 deletions

diff --git a/tvix/store/src/proto/tests/pathinfo.rs b/tvix/store/src/proto/tests/pathinfo.rs
index 3a9ce2e7e3e7..43a94e0d46ae 100644
--- a/tvix/store/src/proto/tests/pathinfo.rs
+++ b/tvix/store/src/proto/tests/pathinfo.rs
@@ -1,4 +1,4 @@
-use crate::proto::{NarInfo, PathInfo, ValidatePathInfoError};
+use crate::proto::{PathInfo, ValidatePathInfoError};
 use crate::tests::fixtures::*;
 use bytes::Bytes;
 use nix_compat::store_path::{self, StorePath};
@@ -150,49 +150,79 @@ fn validate_symlink(
     assert_eq!(t_result, p.validate());
 }
 
+/// Ensure parsing a correct PathInfo without narinfo populated succeeds.
 #[test]
-fn validate_references() {
-    // create a PathInfo without narinfo field.
-    let path_info = PathInfo {
-        node: Some(castorepb::Node {
-            node: Some(castorepb::node::Node::Directory(castorepb::DirectoryNode {
-                name: DUMMY_NAME.into(),
-                digest: DUMMY_DIGEST.clone().into(),
-                size: 0,
-            })),
-        }),
-        references: vec![DUMMY_OUTPUT_HASH.clone().into()],
-        narinfo: None,
-    };
-    assert!(path_info.validate().is_ok());
-
-    // create a PathInfo with a narinfo field, but an inconsistent set of references
-    let path_info_with_narinfo_missing_refs = PathInfo {
-        narinfo: Some(NarInfo {
-            nar_size: 0,
-            nar_sha256: DUMMY_DIGEST.clone().into(),
-            signatures: vec![],
-            reference_names: vec![],
-        }),
-        ..path_info.clone()
-    };
-    match path_info_with_narinfo_missing_refs
-        .validate()
-        .expect_err("must_fail")
-    {
-        ValidatePathInfoError::InconsistentNumberOfReferences(_, _) => {}
-        _ => panic!("unexpected error"),
+fn validate_references_without_narinfo_ok() {
+    assert!(PATH_INFO_WITHOUT_NARINFO.validate().is_ok());
+}
+
+/// Ensure parsing a correct PathInfo with narinfo populated succeeds.
+#[test]
+fn validate_references_with_narinfo_ok() {
+    assert!(PATH_INFO_WITH_NARINFO.validate().is_ok());
+}
+
+/// Create a PathInfo with a wrong count of narinfo.reference_names,
+/// and ensure validation fails.
+#[test]
+fn validate_inconsistent_num_refs_fail() {
+    let mut path_info = PATH_INFO_WITH_NARINFO.clone();
+    path_info.narinfo.as_mut().unwrap().reference_names = vec![];
+
+    match path_info.validate().expect_err("must_fail") {
+        ValidatePathInfoError::InconsistentNumberOfReferences(1, 0) => {}
+        e => panic!("unexpected error: {:?}", e),
     };
+}
 
-    // create a pathinfo with the correct number of references, should suceed
-    let path_info_with_narinfo = PathInfo {
-        narinfo: Some(NarInfo {
-            nar_size: 0,
-            nar_sha256: DUMMY_DIGEST.clone().into(),
-            signatures: vec![],
-            reference_names: vec![DUMMY_NAME.to_string()],
-        }),
-        ..path_info
+/// Create a PathInfo with a wrong digest length in references.
+#[test]
+fn validate_invalid_reference_digest_len() {
+    let mut path_info = PATH_INFO_WITHOUT_NARINFO.clone();
+    path_info.references.push(vec![0xff, 0xff].into());
+
+    match path_info.validate().expect_err("must fail") {
+        ValidatePathInfoError::InvalidReferenceDigestLen(
+            1, // position
+            2, // unexpected digest len
+        ) => {}
+        e => panic!("unexpected error: {:?}", e),
     };
-    assert!(path_info_with_narinfo.validate().is_ok());
+}
+
+/// Create a PathInfo with a narinfo.reference_name[1] that is no valid store path.
+#[test]
+fn validate_invalid_narinfo_reference_name() {
+    let mut path_info = PATH_INFO_WITH_NARINFO.clone();
+
+    // This is invalid, as the store prefix is not part of reference_names.
+    path_info.narinfo.as_mut().unwrap().reference_names[0] =
+        "/nix/store/00000000000000000000000000000000-dummy".to_string();
+
+    match path_info.validate().expect_err("must fail") {
+        ValidatePathInfoError::InvalidNarinfoReferenceName(0, reference_name) => {
+            assert_eq!(
+                "/nix/store/00000000000000000000000000000000-dummy",
+                reference_name
+            );
+        }
+        e => panic!("unexpected error: {:?}", e),
+    }
+}
+
+/// Create a PathInfo with a narinfo.reference_name[0] that doesn't match references[0].
+#[test]
+fn validate_inconsistent_narinfo_reference_name_digest() {
+    let mut path_info = PATH_INFO_WITH_NARINFO.clone();
+
+    // mutate the first reference, they were all zeroes before
+    path_info.references[0] = vec![0xff; store_path::DIGEST_SIZE].into();
+
+    match path_info.validate().expect_err("must fail") {
+        ValidatePathInfoError::InconsistentNarinfoReferenceNameDigest(0, e_expected, e_actual) => {
+            assert_eq!(path_info.references[0][..], e_expected);
+            assert_eq!(DUMMY_OUTPUT_HASH[..], e_actual);
+        }
+        e => panic!("unexpected error: {:?}", e),
+    }
 }
diff --git a/tvix/store/src/tests/fixtures.rs b/tvix/store/src/tests/fixtures.rs
index 4d820af1578e..5ff37a508433 100644
--- a/tvix/store/src/tests/fixtures.rs
+++ b/tvix/store/src/tests/fixtures.rs
@@ -1,5 +1,8 @@
 use lazy_static::lazy_static;
 pub use tvix_castore::fixtures::*;
+use tvix_castore::proto as castorepb;
+
+use crate::proto::{NarInfo, PathInfo};
 
 pub const DUMMY_NAME: &str = "00000000000000000000000000000000-dummy";
 
@@ -94,4 +97,30 @@ lazy_static! {
         1, 0, 0, 0, 0, 0, 0, 0, b')', 0, 0, 0, 0, 0, 0, 0, // ")"
         1, 0, 0, 0, 0, 0, 0, 0, b')', 0, 0, 0, 0, 0, 0, 0, // ")"
     ];
+
+    /// A PathInfo message without .narinfo populated.
+    pub static ref PATH_INFO_WITHOUT_NARINFO : PathInfo = PathInfo {
+        node: Some(castorepb::Node {
+            node: Some(castorepb::node::Node::Directory(castorepb::DirectoryNode {
+                name: DUMMY_NAME.into(),
+                digest: DUMMY_DIGEST.clone().into(),
+                size: 0,
+            })),
+        }),
+        references: vec![DUMMY_OUTPUT_HASH.clone().into()],
+        narinfo: None,
+    };
+
+    /// A PathInfo message with .narinfo populated.
+    /// The references in `narinfo.reference_names` aligns with what's in
+    /// `references`.
+    pub static ref PATH_INFO_WITH_NARINFO : PathInfo = PathInfo {
+        narinfo: Some(NarInfo {
+            nar_size: 0,
+            nar_sha256: DUMMY_DIGEST.clone().into(),
+            signatures: vec![],
+            reference_names: vec![DUMMY_NAME.to_string()],
+        }),
+      ..PATH_INFO_WITHOUT_NARINFO.clone()
+    };
 }