1 files changed, 86 insertions, 0 deletions
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_interface.py b/components/script/dom/bindings/codegen/parser/tests/test_interface.py
index a23243abe61..ea3e842907a 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_interface.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_interface.py
@@ -374,3 +374,89 @@ def WebIDLTest(parser, harness):
         threw = True
     harness.ok(threw,
                "Should not allow unknown extended attributes on interfaces")
+
+    parser = parser.reset()
+    parser.parse("""
+        [Global] interface Window {};
+        [Exposed=Window, LegacyWindowAlias=A]
+        interface B {};
+        [Exposed=Window, LegacyWindowAlias=(C, D)]
+        interface E {};
+    """);
+    results = parser.finish();
+    harness.check(results[1].legacyWindowAliases, ["A"],
+                  "Should support a single identifier")
+    harness.check(results[2].legacyWindowAliases, ["C", "D"],
+                  "Should support an identifier list")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            [LegacyWindowAlias]
+            interface A {};
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+    harness.ok(threw,
+               "Should not allow [LegacyWindowAlias] with no value")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            [Exposed=Worker, LegacyWindowAlias=B]
+            interface A {};
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+    harness.ok(threw,
+               "Should not allow [LegacyWindowAlias] without Window exposure")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            [Global] interface Window {};
+            interface A {};
+            [Exposed=Window, LegacyWindowAlias=A]
+            interface B {};
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+    harness.ok(threw,
+               "Should not allow [LegacyWindowAlias] to conflict with other identifiers")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            [Global] interface Window {};
+            [Exposed=Window, LegacyWindowAlias=A]
+            interface B {};
+            interface A {};
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+    harness.ok(threw,
+               "Should not allow [LegacyWindowAlias] to conflict with other identifiers")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            [Global] interface Window {};
+            [Exposed=Window, LegacyWindowAlias=A]
+            interface B {};
+            [Exposed=Window, LegacyWindowAlias=A]
+            interface C {};
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+    harness.ok(threw,
+               "Should not allow [LegacyWindowAlias] to conflict with other identifiers")