1 files changed, 64 insertions, 0 deletions
diff --git a/dom/bindings/parser/tests/test_duplicate_qualifiers.py b/dom/bindings/parser/tests/test_duplicate_qualifiers.py
new file mode 100644
index 0000000000..2b37cdc0fb
--- /dev/null
+++ b/dom/bindings/parser/tests/test_duplicate_qualifiers.py
@@ -0,0 +1,64 @@
+def WebIDLTest(parser, harness):
+    threw = False
+    try:
+        parser.parse(
+            """
+            interface DuplicateQualifiers1 {
+              getter getter byte foo(unsigned long index);
+            };
+        """
+        )
+
+        parser.finish()
+    except Exception:
+        threw = True
+
+    harness.ok(threw, "Should have thrown.")
+
+    threw = False
+    try:
+        parser.parse(
+            """
+            interface DuplicateQualifiers2 {
+              setter setter byte foo(unsigned long index, byte value);
+            };
+        """
+        )
+
+        parser.finish()
+    except Exception:
+        threw = True
+
+    harness.ok(threw, "Should have thrown.")
+
+    threw = False
+    try:
+        parser.parse(
+            """
+            interface DuplicateQualifiers4 {
+              deleter deleter byte foo(unsigned long index);
+            };
+        """
+        )
+
+        parser.finish()
+    except Exception:
+        threw = True
+
+    harness.ok(threw, "Should have thrown.")
+
+    threw = False
+    try:
+        parser.parse(
+            """
+            interface DuplicateQualifiers5 {
+              getter deleter getter byte foo(unsigned long index);
+            };
+        """
+        )
+
+        parser.finish()
+    except Exception:
+        threw = True
+
+    harness.ok(threw, "Should have thrown.")