Check namespace can be depended on multiple times

1 files changed, 21 insertions, 0 deletions

diff --git a/src/test/java/org/shedlang/compiler/typechecker/NamespaceDependencyLineariserTests.java b/src/test/java/org/shedlang/compiler/typechecker/NamespaceDependencyLineariserTests.java
index 0492ce5d..bf2e9816 100644
--- a/src/test/java/org/shedlang/compiler/typechecker/NamespaceDependencyLineariserTests.java
+++ b/src/test/java/org/shedlang/compiler/typechecker/NamespaceDependencyLineariserTests.java
@@ -56,6 +56,27 @@ public class NamespaceDependencyLineariserTests {
     }
 
     @Test
+    public void namespaceCanBeDependedOnMultipleTimes() {
+        var namespaces = List.of(
+            namespaceNode("A", List.of("Z")),
+            namespaceNode("B", List.of("Z")),
+            namespaceNode("Z", List.of()),
+            namespaceNode("C", List.of("Z")),
+            namespaceNode("D", List.of("Z"))
+        );
+
+        var result = NamespaceDependencyLineariser.orderNamespaces(namespaces);
+
+        assertThat(result, isSequence(
+            isNamespaceNode("Z"),
+            isNamespaceNode("A"),
+            isNamespaceNode("B"),
+            isNamespaceNode("C"),
+            isNamespaceNode("D")
+        ));
+    }
+
+    @Test
     public void whenNamespaceDirectlyDependsOnItselfThenErrorIsThrown() {
         var namespaces = List.of(
             namespaceNode("A", List.of("A"))