1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/tests/non262/syntax/unicode_other_id_start.js b/js/src/tests/non262/syntax/unicode_other_id_start.js
new file mode 100644
index 0000000000..86790dd00e
--- /dev/null
+++ b/js/src/tests/non262/syntax/unicode_other_id_start.js
@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// From PropList.txt (Unicode 9):
+const otherIdStart = [
+    0x1885,     // MONGOLIAN LETTER ALI GALI BALUDA, Gc=Mn
+    0x1886,     // MONGOLIAN LETTER ALI GALI THREE BALUDA, Gc=Mn
+    0x2118,     // SCRIPT CAPITAL P, Gc=Sm
+    0x212E,     // ESTIMATED SYMBOL, Gc=So
+    0x309B,     // KATAKANA-HIRAGANA VOICED SOUND MARK, Gc=Sk
+    0x309C,     // KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK, Gc=Sk
+];
+
+// Leading character in identifier.
+for (let ident of otherIdStart) {
+    eval(`
+        let ${String.fromCodePoint(ident)} = 123;
+        assertEq(${String.fromCodePoint(ident)}, 123);
+    `);
+    eval(`
+        let \\u${ident.toString(16).padStart(4, "0")} = 123;
+        assertEq(${String.fromCodePoint(ident)}, 123);
+    `);
+    eval(`
+        let \\u{${ident.toString(16)}} = 123;
+        assertEq(${String.fromCodePoint(ident)}, 123);
+    `);
+}
+
+// Not leading character in identifier.
+for (let ident of otherIdStart) {
+    eval(`
+        let A${String.fromCodePoint(ident)} = 123;
+        assertEq(${String.fromCodePoint(0x41, ident)}, 123);
+    `);
+    eval(`
+        let A\\u${ident.toString(16).padStart(4, "0")} = 123;
+        assertEq(${String.fromCodePoint(0x41, ident)}, 123);
+    `);
+    eval(`
+        let A\\u{${ident.toString(16)}} = 123;
+        assertEq(${String.fromCodePoint(0x41, ident)}, 123);
+    `);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");