Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/js/src/tests/test262/language/expressions/coalesce/cannot-chain-tail-with-logical-and.js b/js/src/tests/test262/language/expressions/coalesce/cannot-chain-tail-with-logical-and.js
new file mode 100644
index 0000000000..b11323b4fa
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/coalesce/cannot-chain-tail-with-logical-and.js
@@ -0,0 +1,33 @@
+// |reftest| error:SyntaxError
+// Copyright (C) 2019 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    If the CoalesceExpressionHead is undefined or null, follow return the right-side value.
+    Otherwise, return the left-side value.
+esid: sec-conditional-operator
+info: |
+    ConditionalExpression :
+        ShortCircuitExpression
+        ShortCircuitExpression ? AssignmentExpression : AssignmentExpression
+
+    ShortCircuitExpression :
+        LogicalORExpression
+        CoalesceExpression
+
+    CoalesceExpression :
+        CoalesceExpressionHead ?? BitwiseORExpression
+
+    CoalesceExpressionHead :
+        CoalesceExpression
+        BitwiseORExpression
+features: [coalesce-expression]
+negative:
+    phase: parse
+    type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+0 ?? 0 && true;