1 files changed, 47 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/literals/string/unicode-escape-no-hex-err-double.js b/js/src/tests/test262/language/literals/string/unicode-escape-no-hex-err-double.js
new file mode 100644
index 0000000000..afa71f94b1
--- /dev/null
+++ b/js/src/tests/test262/language/literals/string/unicode-escape-no-hex-err-double.js
@@ -0,0 +1,47 @@
+// |reftest| error:SyntaxError
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: prod-StringLiteral
+description: >
+  \u is at the end of string, Hex4Digits is required.
+info: |
+  StringLiteral ::
+    " DoubleStringCharacters_opt "
+    ' SingleStringCharacters_opt '
+
+  DoubleStringCharacters ::
+    DoubleStringCharacter DoubleStringCharacters_opt
+
+  DoubleStringCharacter ::
+    SourceCharacter but not one of " or \ or LineTerminator
+    <LS>
+    <PS>
+    \ EscapeSequence
+    LineContinuation
+
+  EscapeSequence ::
+    CharacterEscapeSequence
+    0 [lookahead ∉ DecimalDigit]
+    HexEscapeSequence
+    UnicodeEscapeSequence
+
+  UnicodeEscapeSequence ::
+    u Hex4Digits
+    u{ CodePoint }
+
+  Hex4Digits ::
+    HexDigit HexDigit HexDigit HexDigit
+
+  HexDigit :: one of
+    0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F
+
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+"\u"