From df975efcd35604b0799e3c552b1f3de21a4425d0 Mon Sep 17 00:00:00 2001
From: Val Lorentz <progval+opdb@progval.net>
Date: Sun, 21 May 2023 14:33:53 +0200
Subject: [PATCH] Add tests for field id clashes

---
 glowtables/tests/table_test.py | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/glowtables/tests/table_test.py b/glowtables/tests/table_test.py
index a173f4b..b8af124 100644
--- a/glowtables/tests/table_test.py
+++ b/glowtables/tests/table_test.py
@@ -14,6 +14,7 @@
 
 import textwrap
 
+import pytest
 import rdflib
 
 from glowtables.table import Language, LiteralField, Table
@@ -90,3 +91,35 @@ def test_default_value() -> None:
         }
         """
     )
+
+
+def test_field_id_subject() -> None:
+    name_field = LiteralField(
+        "subject",
+        {Language("en"): "Name"},
+        rdflib.URIRef("http://example.org/display-name"),
+    )
+    with pytest.raises(ValueError, match="both subject and a field id"):
+        Table(
+            fields=[name_field],
+            constraints="",
+        )
+
+
+def test_field_id_clash() -> None:
+    name_field = LiteralField(
+        "name",
+        {Language("en"): "Name"},
+        rdflib.URIRef("http://example.org/name"),
+    )
+    display_name_field = LiteralField(
+        "name",
+        {Language("en"): "Display Name"},
+        rdflib.URIRef("http://example.org/display-name"),
+    )
+    with pytest.raises(ValueError, match="has duplicate field ids: name"):
+        Table(
+            fields=[name_field, display_name_field],
+            constraints="",
+        )
+