1 files changed, 105 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Syntax/escaped-strict-reserved-words-and-yield.js b/js/src/tests/ecma_6/Syntax/escaped-strict-reserved-words-and-yield.js
new file mode 100644
index 000000000..9d683bd97
--- /dev/null
+++ b/js/src/tests/ecma_6/Syntax/escaped-strict-reserved-words-and-yield.js
@@ -0,0 +1,105 @@
+/* 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/. */
+
+const testCases = [
+    // Label identifier.
+    id => `${id}: ;`,
+
+    // Binding identifier.
+    id => `var ${id};`,
+    id => `let ${id};`,
+    id => `const ${id} = 0;`,
+
+    // Binding identifier in binding pattern.
+    id => `var [${id}] = [];`,
+    id => `var [${id} = 0] = [];`,
+    id => `var [...${id}] = [];`,
+    id => `var {a: ${id}} = {};`,
+    id => `var {${id}} = {};`,
+    id => `var {${id} = 0} = {};`,
+
+    id => `let [${id}] = [];`,
+    id => `let [${id} = 0] = [];`,
+    id => `let [...${id}] = [];`,
+    id => `let {a: ${id}} = {};`,
+    id => `let {${id}} = {};`,
+    id => `let {${id} = 0} = {};`,
+
+    id => `const [${id}] = [];`,
+    id => `const [${id} = 0] = [];`,
+    id => `const [...${id}] = [];`,
+    id => `const {a: ${id}} = {};`,
+    id => `const {${id}} = {};`,
+    id => `const {${id} = 0} = {};`,
+
+    // Identifier reference.
+    id => `void ${id};`,
+];
+
+const strictReservedWords = [
+    "implements",
+    "interface",
+    "package",
+    "private",
+    "protected",
+    "public",
+];
+
+function escapeWord(s) {
+    return "\\u00" + s.charCodeAt(0).toString(16) + s.substring(1);
+}
+
+for (let strictReservedWordOrYield of [...strictReservedWords, "yield"]) {
+    let escapedStrictReservedWordOrYield = escapeWord(strictReservedWordOrYield);
+
+    for (let testCase of testCases) {
+        eval(testCase(strictReservedWordOrYield));
+        eval(testCase(escapedStrictReservedWordOrYield));
+
+        assertThrowsInstanceOf(() => eval(String.raw`
+            "use strict";
+            ${testCase(strictReservedWordOrYield)}
+        `), SyntaxError);
+
+        assertThrowsInstanceOf(() => eval(String.raw`
+            "use strict";
+            ${testCase(escapedStrictReservedWordOrYield)}
+        `), SyntaxError);
+    }
+}
+
+// |yield| is always a keyword in generator functions.
+for (let testCase of testCases) {
+    let yield = "yield";
+    let escapedYield = escapeWord("yield");
+
+    assertThrowsInstanceOf(() => eval(String.raw`
+        function* g() {
+            ${testCase(yield)}
+        }
+    `), SyntaxError);
+
+    assertThrowsInstanceOf(() => eval(String.raw`
+        function* g() {
+            ${testCase(escapedYield)}
+        }
+    `), SyntaxError);
+
+    assertThrowsInstanceOf(() => eval(String.raw`
+        "use strict";
+        function* g() {
+            ${testCase(yield)}
+        }
+    `), SyntaxError);
+
+    assertThrowsInstanceOf(() => eval(String.raw`
+        "use strict";
+        function* g() {
+            ${testCase(escapedYield)}
+        }
+    `), SyntaxError);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");