1 files changed, 50 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/spread-array.js b/js/src/jit-test/tests/basic/spread-array.js
new file mode 100644
index 0000000000..30d4cb52b4
--- /dev/null
+++ b/js/src/jit-test/tests/basic/spread-array.js
@@ -0,0 +1,50 @@
+load(libdir + "asserts.js");
+load(libdir + "iteration.js");
+load(libdir + "eqArrayHelper.js");
+
+assertEqArray([...[1, 2, 3]], [1, 2, 3]);
+assertEqArray([1, ...[2, 3, 4], 5], [1, 2, 3, 4, 5]);
+assertEqArray([1, ...[], 2], [1, 2]);
+assertEqArray([1, ...[2, 3], 4, ...[5, 6]], [1, 2, 3, 4, 5, 6]);
+assertEqArray([1, ...[], 2], [1, 2]);
+assertEqArray([1,, ...[2]], [1,, 2]);
+assertEqArray([1,, ...[2],, 3,, 4,], [1,, 2,, 3,, 4,]);
+assertEqArray([...[1, 2, 3],,,,], [1, 2, 3,,,,]);
+assertEqArray([,,...[1, 2, 3],,,,], [,,1,2,3,,,,]);
+assertEqArray([...[1, 2, 3],,,,...[]], [1,2,3,,,,]);
+
+assertEqArray([...[undefined]], [undefined]);
+
+// other iterable objects
+assertEqArray([...new Int32Array([1, 2, 3])], [1, 2, 3]);
+assertEqArray([..."abc"], ["a", "b", "c"]);
+assertEqArray([...[1, 2, 3][Symbol.iterator]()], [1, 2, 3]);
+assertEqArray([...new Set([1, 2, 3])], [1, 2, 3]);
+assertEqArray([...new Map([["a", "A"], ["b", "B"], ["c", "C"]])].map(([k, v]) => k + v), ["aA", "bB", "cC"]);
+let itr = {};
+itr[Symbol.iterator] = function () {
+    return {
+        i: 1,
+        next: function() {
+            if (this.i < 4)
+                return { value: this.i++, done: false };
+            else
+                return { value: undefined, done: true };
+        }
+    };
+}
+assertEqArray([...itr], [1, 2, 3]);
+function* gen() {
+    for (let i = 1; i < 4; i ++)
+        yield i;
+}
+assertEqArray([...gen()], [1, 2, 3]);
+
+let a, b = [1, 2, 3];
+assertEqArray([...a=b], [1, 2, 3]);
+
+// 12.2.4.1.2 Runtime Semantics: ArrayAccumulation
+// If Type(spreadObj) is not Object, then throw a TypeError exception.
+assertThrowsInstanceOf(() => [...null], TypeError);
+assertThrowsInstanceOf(() => [...undefined], TypeError);
+