Add m-esr52 at 52.6.0

1 files changed, 87 insertions, 0 deletions

diff --git a/js/src/tests/ecma_7/Destructuring/rest-parameter-syntax.js b/js/src/tests/ecma_7/Destructuring/rest-parameter-syntax.js
new file mode 100644
index 000000000..a145d1a2d
--- /dev/null
+++ b/js/src/tests/ecma_7/Destructuring/rest-parameter-syntax.js
@@ -0,0 +1,87 @@
+/* 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 bindingPatterns = [
+    "[]",
+    "[a]",
+    "[a, b]",
+    "[a, ...b]",
+    "[...a]",
+    "[...[]]",
+
+    "{}",
+    "{p: a}",
+    "{p: a = 0}",
+    "{p: {}}",
+    "{p: a, q: b}",
+    "{a}",
+    "{a, b}",
+    "{a = 0}",
+];
+
+const functions = [
+    p => `function f(${p}) {}`,
+    p => `function* g(${p}) {}`,
+    p => `({m(${p}) {}});`,
+    p => `(class {m(${p}) {}});`,
+    p => `(${p}) => {};`,
+];
+
+for (let pattern of bindingPatterns) {
+    for (let fn of functions) {
+        // No leading parameters.
+        eval(fn(`...${pattern}`));
+
+        // Leading normal parameters.
+        eval(fn(`x, ...${pattern}`));
+        eval(fn(`x, y, ...${pattern}`));
+
+        // Leading parameters with defaults.
+        eval(fn(`x = 0, ...${pattern}`));
+        eval(fn(`x = 0, y = 0, ...${pattern}`));
+
+        // Leading array destructuring parameters.
+        eval(fn(`[], ...${pattern}`));
+        eval(fn(`[x], ...${pattern}`));
+        eval(fn(`[x = 0], ...${pattern}`));
+        eval(fn(`[...x], ...${pattern}`));
+
+        // Leading object destructuring parameters.
+        eval(fn(`{}, ...${pattern}`));
+        eval(fn(`{p: x}, ...${pattern}`));
+        eval(fn(`{x}, ...${pattern}`));
+        eval(fn(`{x = 0}, ...${pattern}`));
+
+        // Trailing parameters after rest parameter.
+        assertThrowsInstanceOf(() => eval(fn(`...${pattern},`)), SyntaxError);
+        assertThrowsInstanceOf(() => eval(fn(`...${pattern}, x`)), SyntaxError);
+        assertThrowsInstanceOf(() => eval(fn(`...${pattern}, x = 0`)), SyntaxError);
+        assertThrowsInstanceOf(() => eval(fn(`...${pattern}, ...x`)), SyntaxError);
+        assertThrowsInstanceOf(() => eval(fn(`...${pattern}, []`)), SyntaxError);
+        assertThrowsInstanceOf(() => eval(fn(`...${pattern}, {}`)), SyntaxError);
+
+        // Rest parameter with defaults.
+        assertThrowsInstanceOf(() => eval(fn(`...${pattern} = 0`)), SyntaxError);
+    }
+}
+
+for (let fn of functions) {
+    // Missing name, incomplete patterns.
+    assertThrowsInstanceOf(() => eval(fn(`...`)), SyntaxError);
+    assertThrowsInstanceOf(() => eval(fn(`...[`)), SyntaxError);
+    assertThrowsInstanceOf(() => eval(fn(`...{`)), SyntaxError);
+
+    // Invalid binding name.
+    assertThrowsInstanceOf(() => eval(fn(`...[0]`)), SyntaxError);
+    assertThrowsInstanceOf(() => eval(fn(`...[p.q]`)), SyntaxError);
+}
+
+// Rest parameters aren't valid in getter/setter methods.
+assertThrowsInstanceOf(() => eval(`({get p(...[]) {}})`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`({set p(...[]) {}})`), SyntaxError);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);