Throw NoSuchMethod when method doesn't exist

1 files changed, 9 insertions, 0 deletions

diff --git a/src/test/java/org/zwobble/couscous/tests/interpreter/EvaluatorTests.java b/src/test/java/org/zwobble/couscous/tests/interpreter/EvaluatorTests.java
index 442c6e9..ee4f700 100644
--- a/src/test/java/org/zwobble/couscous/tests/interpreter/EvaluatorTests.java
+++ b/src/test/java/org/zwobble/couscous/tests/interpreter/EvaluatorTests.java
@@ -5,6 +5,7 @@ import org.zwobble.couscous.ast.FormalArgumentNode;
 import org.zwobble.couscous.ast.TernaryConditionalNode;
 import org.zwobble.couscous.interpreter.ConditionMustBeBoolean;
 import org.zwobble.couscous.interpreter.Environment;
+import org.zwobble.couscous.interpreter.NoSuchMethod;
 import org.zwobble.couscous.values.IntegerValue;
 import org.zwobble.couscous.values.StringValue;
 
@@ -64,6 +65,14 @@ public class EvaluatorTests {
         assertEquals(new StringValue("ell"), result);
     }
     
+    @Test
+    public void errorIfMethodDoesNotExist() {
+        val exception = assertThrows(NoSuchMethod.class,
+            () -> eval(emptyEnvironment(),
+                methodCall(literal("hello"), "size")));
+        assertEquals(new NoSuchMethod("size"), exception);
+    }
+    
     private static Environment emptyEnvironment() {
         return new Environment(ImmutableMap.of());
     }