2 files changed, 35 insertions, 0 deletions
diff --git a/src/test/java/org/shedlang/compiler/stackir/InstructionSerializerTests.java b/src/test/java/org/shedlang/compiler/stackir/InstructionSerializerTests.java
index 9f3fc75f..b0143a9b 100644
--- a/src/test/java/org/shedlang/compiler/stackir/InstructionSerializerTests.java
+++ b/src/test/java/org/shedlang/compiler/stackir/InstructionSerializerTests.java
@@ -56,6 +56,26 @@ public class InstructionSerializerTests {
     }
 
     @Test
+    public void canSerializeDefineStruct() {
+        var instruction = Instructions.defineStruct(
+            Types.struct(NamespaceName.of("Example", "Project"), "User"),
+            List.of(
+                Instructions.defineStructField("name"),
+                Instructions.defineStructField("id")
+            )
+        );
+
+        var string = serialize(instruction);
+
+        assertThat(string, equalTo("""
+            (
+                define-struct
+                type="Example/Project.User"
+                fields=("name" "id")
+            )"""));
+    }
+
+    @Test
     public void canSerializeDiscard() {
         var instruction = Instructions.discard();
 
diff --git a/src/test/java/org/shedlang/compiler/stackir/instructions/Instructions.java b/src/test/java/org/shedlang/compiler/stackir/instructions/Instructions.java
index f30c75c6..3ac0ac62 100644
--- a/src/test/java/org/shedlang/compiler/stackir/instructions/Instructions.java
+++ b/src/test/java/org/shedlang/compiler/stackir/instructions/Instructions.java
@@ -15,6 +15,21 @@ public class Instructions {
         return new CallInstruction(positionalArgCount, namedArgNames, Sources.NULL);
     }
 
+    public static Instruction defineStruct(
+        StructType type,
+        List<DefineStructInstruction.Field> fields
+    ) {
+        return new DefineStructInstruction(
+            type,
+            fields,
+            Sources.NULL
+        );
+    }
+
+    public static DefineStructInstruction.Field defineStructField(String name) {
+        return new DefineStructInstruction.Field(name, Sources.NULL);
+    }
+
     public static Instruction discard() {
         return new DiscardInstruction(Sources.NULL);
     }