1 files changed, 22 insertions, 4 deletions
diff --git a/src/test/java/org/shedlang/compiler/shid/ShidSerializerTests.java b/src/test/java/org/shedlang/compiler/shid/ShidSerializerTests.java
index 6018fa88..70218cc3 100644
--- a/src/test/java/org/shedlang/compiler/shid/ShidSerializerTests.java
+++ b/src/test/java/org/shedlang/compiler/shid/ShidSerializerTests.java
@@ -1,10 +1,7 @@
 package org.shedlang.compiler.shid;
 
 import org.junit.jupiter.api.Test;
-import org.shedlang.compiler.shid.instructions.Shid;
-import org.shedlang.compiler.shid.instructions.ShidDefineFunction;
-import org.shedlang.compiler.shid.instructions.ShidInstruction;
-import org.shedlang.compiler.shid.instructions.ShidVariable;
+import org.shedlang.compiler.shid.instructions.*;
 import org.shedlang.compiler.types.Effects;
 import org.shedlang.compiler.types.NamespaceName;
 import org.shedlang.compiler.types.Types;
@@ -46,6 +43,27 @@ public class ShidSerializerTests {
     }
 
     @Test
+    public void canSerializeDeclareNativeFunction() {
+        var instruction = ShidDeclareNativeFunction.builder()
+            .withName("f")
+            .addPositionalParam("p1")
+            .addPositionalParam("p2")
+            .addNamedParam("n1")
+            .addNamedParam("n2")
+            .build();
+
+        var string = serialize(instruction);
+
+        assertThat(string, equalTo("""
+            (
+                declare-native-function
+                name="f"
+                positional-params=("p1" "p2")
+                named-params=("n1" "n2")
+            )"""));
+    }
+
+    @Test
     public void canSerializeDefineEffect() {
         var instruction = Shid.defineEffect(
             Effects.userDefined(NamespaceName.of("Example", "Project"), "State")