test(versioning): pin supported compatibility matrix

req: abi/001

req: abi/003

req: v1_release/007

hemx-core/tests/effect_batch.rs

@@ -30,6 +30,28 @@ fn effect_batch_wire_round_trips() {
     assert!(decoded.is_compatible());
 }
 
+#[test]
+fn compatibility_fixture_accepts_only_the_declared_v1_wire_version() {
+    // test req: abi/001 req: abi/003 req: v1_release/007
+    const V1_EMPTY_BATCH: &[u8] = &[
+        72, 69, 77, 88, // HEMX
+        1, 0, // ABI v1
+        0, 0, // reserved
+        7, 0, 0, 0, 0, 0, 0, 0, // fingerprint
+        0, 0, 0, 0, // zero operations
+    ];
+    assert_eq!(
+        EffectBatch::from_wire(V1_EMPTY_BATCH).unwrap().to_wire(),
+        V1_EMPTY_BATCH
+    );
+
+    let mut future = V1_EMPTY_BATCH.to_vec();
+    future[4] = 2;
+    let future = EffectBatch::from_wire(&future).unwrap();
+    assert_eq!(future.abi_version, 2);
+    assert!(!future.is_compatible());
+}
+
 #[test]
 fn encoded_len_covers_every_effect_shape() {
     let unscoped = ResourceRef::unscoped(ResourceId::new(ResourceKind::Slot, 1));