Cover native interop in no-alloc smoke

Author: eldryoth

CHANGELOG.md

@@ -124,6 +124,8 @@
 - Added zero-dependency `TryFrom<&[u8; N]>` interop for `EncodedBuffer`,
   `DecodedBuffer`, and `SecretBuffer` so byte-string literals use the same
   explicit strict standard policy as byte slices.
+- Expanded no-alloc smoke coverage and release metadata validation for the
+  native byte-array and `FromStr` buffer interop surfaces.
 
 ## 0.8.0 - 2026-05-16
 

portability/no_alloc_smoke/src/lib.rs

@@ -430,12 +430,42 @@ pub fn fmt_surfaces() -> bool {
     output.as_bytes() == b"aGVsbG8="
 }
 
+pub fn native_interop_surfaces() -> bool {
+    let encoded = match EncodedBuffer::<8>::try_from(b"hello") {
+        Ok(encoded) => encoded,
+        Err(_) => return false,
+    };
+    if encoded.as_bytes() != b"aGVsbG8=" {
+        return false;
+    }
+
+    let decoded = match DecodedBuffer::<5>::try_from(b"aGVsbG8=") {
+        Ok(decoded) => decoded,
+        Err(_) => return false,
+    };
+    if decoded.as_bytes() != b"hello" {
+        return false;
+    }
+
+    let parsed = match "aGVsbG8=".parse::<DecodedBuffer<5>>() {
+        Ok(decoded) => decoded,
+        Err(_) => return false,
+    };
+    if parsed.as_bytes() != b"hello" {
+        return false;
+    }
+
+    DecodedBuffer::<5>::try_from(b"aGVsbG8").is_err()
+        && "aGVsbG8".parse::<DecodedBuffer<5>>().is_err()
+}
+
 #[cfg(test)]
 mod tests {
     use super::{
         CONST_HELLO, clear_tail_surfaces, ct_stack_decode, custom_profile_surfaces, fmt_surfaces,
-        in_place_surfaces, legacy_stack_decode, length_and_stack_state_surfaces, stack_round_trip,
-        named_profile_surfaces, url_safe_round_trip, validate_only_surfaces, wrapped_round_trip,
+        in_place_surfaces, legacy_stack_decode, length_and_stack_state_surfaces,
+        named_profile_surfaces, native_interop_surfaces, stack_round_trip, url_safe_round_trip,
+        validate_only_surfaces, wrapped_round_trip,
     };
 
     #[test]
@@ -461,5 +491,6 @@ mod tests {
         assert!(ct_stack_decode());
         assert!(length_and_stack_state_surfaces());
         assert!(fmt_surfaces());
+        assert!(native_interop_surfaces());
     }
 }

scripts/validate-release-metadata.sh

@@ -210,6 +210,7 @@ for required_no_alloc_symbol in \
     "custom_profile_surfaces" \
     "validate_only_surfaces" \
     "in_place_surfaces" \
+    "native_interop_surfaces" \
     "BCRYPT" \
     "CRYPT" \
     "MIME" \