1 files changed, 11 insertions, 0 deletions
diff --git a/src/test/java/org/zwobble/couscous/tests/BackendEvalTests.java b/src/test/java/org/zwobble/couscous/tests/BackendEvalTests.java
index c6b7ba2..0554025 100644
--- a/src/test/java/org/zwobble/couscous/tests/BackendEvalTests.java
+++ b/src/test/java/org/zwobble/couscous/tests/BackendEvalTests.java
@@ -5,6 +5,7 @@ import org.zwobble.couscous.ast.ExpressionNode;
 import org.zwobble.couscous.ast.TernaryConditionalNode;
 import org.zwobble.couscous.values.IntegerValue;
 import org.zwobble.couscous.values.PrimitiveValue;
+import org.zwobble.couscous.values.StringValue;
 
 import static java.util.Arrays.asList;
 import static org.junit.Assert.assertEquals;
@@ -45,5 +46,15 @@ public abstract class BackendEvalTests {
         assertEquals(value(5), result);
     }
     
+    @Test
+    public void canCallMethodWithArgumentsOnBuiltin() {
+        val result = evalExpression(methodCall(
+            literal("hello"),
+            "substring",
+            asList(literal(1), literal(4)),
+            StringValue.REF));
+        assertEquals(value("ell"), result);
+    }
+    
     protected abstract PrimitiveValue evalExpression(ExpressionNode expression);
 }