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-rw-r--r--js/src/tests/ecma_7/Destructuring/rest-parameter-syntax.js87
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);