1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/non262/Math/sign.js b/js/src/tests/non262/Math/sign.js
new file mode 100644
index 0000000000..5552dfc3d4
--- /dev/null
+++ b/js/src/tests/non262/Math/sign.js
@@ -0,0 +1,34 @@
+// If x is NaN, the result is NaN.
+assertEq(Math.sign(NaN), NaN);
+
+// If x is −0, the result is −0.
+assertEq(Math.sign(-0), -0);
+
+// If x is +0, the result is +0.
+assertEq(Math.sign(+0), +0);
+
+// If x is negative and not −0, the result is −1.
+assertEq(Math.sign(-Number.MIN_VALUE), -1);
+assertEq(Math.sign(-Number.MAX_VALUE), -1);
+assertEq(Math.sign(-Infinity), -1);
+
+for (var i = -1; i > -20; i--)
+    assertEq(Math.sign(i), -1);
+
+assertEq(Math.sign(-1e-300), -1);
+assertEq(Math.sign(-0x80000000), -1);
+
+// If x is positive and not +0, the result is +1.
+assertEq(Math.sign(Number.MIN_VALUE), +1);
+assertEq(Math.sign(Number.MAX_VALUE), +1);
+assertEq(Math.sign(Infinity), +1);
+
+for (var i = 1; i < 20; i++)
+    assertEq(Math.sign(i), +1);
+
+assertEq(Math.sign(+1e-300), +1);
+assertEq(Math.sign(0x80000000), +1);
+assertEq(Math.sign(0xffffffff), +1);
+
+
+reportCompare(0, 0, "ok");