2 files changed, 20 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 1ba7fb6a..2f8c4c44 100644
--- a/src/test/java/org/shedlang/compiler/stackir/InstructionSerializerTests.java
+++ b/src/test/java/org/shedlang/compiler/stackir/InstructionSerializerTests.java
@@ -129,6 +129,18 @@ public class InstructionSerializerTests {
     }
 
     @Test
+    public void canSerializeUserDefinedEffectFieldLoad() {
+        var instruction = Instructions.fieldLoad(
+            Effects.userDefined(NamespaceName.of("Example", "Project"), "State"),
+            "read"
+        );
+
+        var string = serialize(instruction);
+
+        assertThat(string, equalTo("(field-load (effect \"Example/Project.State\") \"read\")"));
+    }
+
+    @Test
     public void canSerializeIf() {
         var instruction = Instructions.if_(
             1,
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 fe820b55..ae776fc7 100644
--- a/src/test/java/org/shedlang/compiler/stackir/instructions/Instructions.java
+++ b/src/test/java/org/shedlang/compiler/stackir/instructions/Instructions.java
@@ -59,6 +59,14 @@ public class Instructions {
         );
     }
 
+    public static Instruction fieldLoad(UserDefinedEffect effect, String fieldName) {
+        return new FieldLoadInstruction(
+            new FieldLoadInstruction.Receiver.Effect(effect),
+            fieldName,
+            Sources.NULL
+        );
+    }
+
     public static Instruction if_(
         int resultCount,
         List<Instruction> trueBody,