Handle invalid field name

1 files changed, 16 insertions, 0 deletions

diff --git a/src/test/java/org/shedlang/compiler/types/NamespaceTypeInfoTests.java b/src/test/java/org/shedlang/compiler/types/NamespaceTypeInfoTests.java
index 0aba6f1d..c22f312a 100644
--- a/src/test/java/org/shedlang/compiler/types/NamespaceTypeInfoTests.java
+++ b/src/test/java/org/shedlang/compiler/types/NamespaceTypeInfoTests.java
@@ -5,6 +5,7 @@ import org.shedlang.compiler.util.P;
 
 import java.util.Map;
 
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.zwobble.precisely.AssertThat.assertThat;
 import static org.zwobble.precisely.Matchers.equalTo;
 
@@ -32,4 +33,19 @@ public class NamespaceTypeInfoTests {
 
         assertThat(result, equalTo(1));
     }
+
+    @Test
+    public void whenFieldDoesNotExistThenFieldIndexThrowsError() {
+        var namespaceTypeInfo = new NamespaceTypeInfo(P.orderedMap(
+            Map.entry("a", Types.INT),
+            Map.entry("b", Types.STRING)
+        ));
+
+        var error = assertThrows(
+            NoSuchFieldInternalError.class,
+            () -> namespaceTypeInfo.fieldIndex("c")
+        );
+
+        assertThat(error.fieldName(), equalTo("c"));
+    }
 }