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-rw-r--r--js/src/jit-test/tests/arguments/defaults-evaluation-order.js27
1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/arguments/defaults-evaluation-order.js b/js/src/jit-test/tests/arguments/defaults-evaluation-order.js
new file mode 100644
index 000000000..c4ddff737
--- /dev/null
+++ b/js/src/jit-test/tests/arguments/defaults-evaluation-order.js
@@ -0,0 +1,27 @@
+function f1(a, bIs, cIs, dIs, b=a, c=5, d=c) {
+ assertEq(a, 1);
+ assertEq(b, bIs);
+ assertEq(c, cIs);
+ assertEq(d, dIs);
+}
+f1(1, 1, 5, 5);
+f1(1, 42, 5, 5, 42);
+f1(1, 42, 43, 43, 42, 43);
+f1(1, 42, 43, 44, 42, 43, 44);
+function f2(a=[]) { return a; }
+assertEq(f2() !== f2(), true);
+function f3(a=function () {}) { return a; }
+assertEq(f3() !== f3(), true);
+function f4(a=Date) { return a; }
+assertEq(f4(), Date);
+Date = 0;
+assertEq(f4(), 0);
+function f5(x=FAIL()) {}; // don't throw
+var n = 0;
+function f6(a=n++) {}
+assertEq(n, 0);
+function f7([a, b], A=a, B=b) {
+ assertEq(A, a);
+ assertEq(B, b);
+}
+f7([0, 1]);