Handle unknown namespace in import type checking

1 files changed, 22 insertions, 1 deletions

diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/typechecker/TypeCheckerNamespaceTests.java b/src/test/java/org/zwobble/hobgoblin/compiler/typechecker/TypeCheckerNamespaceTests.java
index 3559578..82cccf3 100644
--- a/src/test/java/org/zwobble/hobgoblin/compiler/typechecker/TypeCheckerNamespaceTests.java
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/typechecker/TypeCheckerNamespaceTests.java
@@ -43,7 +43,7 @@ public class TypeCheckerNamespaceTests {
             ))
         ));
         assertThat(
-            context.namespaceFields(NamespaceName.of("a", "b")).fieldType("X").orElseThrow(),
+            context.namespaceFields(NamespaceName.of("a", "b")).orElseThrow().fieldType("X").orElseThrow(),
             isMetaType(new StructType(NamespaceName.of("a", "b"), "X"))
         );
     }
@@ -100,6 +100,27 @@ public class TypeCheckerNamespaceTests {
     }
 
     @Test
+    public void whenNamespaceIsUnknownThenErrorIsThrown() {
+        var untyped = UntypedNamespaceNode.arbitrary()
+            .withImports(List.of(
+                UntypedImportNode.arbitrary()
+                    .withAncestorDepth(Optional.empty())
+                    .withNamespaceName(NamespaceName.of("a"))
+                    .withImportedNames(List.of("A"))
+                    .build()
+            ))
+            .build();
+        var context = TypeCheckerContextArb.globalContext();
+
+        var error = assertThrows(
+            UnknownNamespaceError.class,
+            () -> TypeChecker.typeCheckNamespace(untyped, context)
+        );
+
+        assertThat(error.namespaceName(), equalTo(NamespaceName.of("a")));
+    }
+
+    @Test
     public void whenNamespaceHasNoSuchFieldThenErrorIsThrown() {
         var untyped = UntypedNamespaceNode.arbitrary()
             .withImports(List.of(