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-rw-r--r--js/src/jit-test/tests/basic/math-random.js43
1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/math-random.js b/js/src/jit-test/tests/basic/math-random.js
new file mode 100644
index 000000000..e9efab588
--- /dev/null
+++ b/js/src/jit-test/tests/basic/math-random.js
@@ -0,0 +1,43 @@
+function test() {
+ setRNGState(0x12341234, 0x98765);
+
+ function f() {
+ let x = [];
+ for (let i = 0; i < 10000; i++) {
+ x.push(Math.random());
+ }
+ return x;
+ }
+ let x = f();
+ assertEq(x[0], 0.28443027522441433);
+ assertEq(x[10], 0.5283908544644392);
+ assertEq(x[100], 0.5593668121538891);
+ assertEq(x[1000], 0.7008807796441313);
+ assertEq(x[2000], 0.11737403776989574);
+ assertEq(x[3000], 0.08573924080320472);
+ assertEq(x[4000], 0.22428965439295678);
+ assertEq(x[5000], 0.4657521920883555);
+ assertEq(x[6000], 0.11816220100329233);
+ assertEq(x[7000], 0.6306689010335697);
+ assertEq(x[8000], 0.8654862148946609);
+ assertEq(x[9000], 0.31734259460387015);
+ assertEq(x[9999], 0.013959566914027777);
+
+ // Test some other (arbitrary) seeds.
+ setRNGState(0, 1);
+ x = f();
+ assertEq(x[0], 2.220446049250313e-16);
+ assertEq(x[2000], 0.8259328082050756);
+ assertEq(x[6000], 0.01060492365550314);
+ assertEq(x[9999], 0.7402370773147143);
+
+ setRNGState(0x0fff0101, 0x44440001);
+ x = f();
+ assertEq(x[0], 0.24994062119568194);
+ assertEq(x[2000], 0.4375430448883283);
+ assertEq(x[6000], 0.7298689950209452);
+ assertEq(x[9999], 0.13284280897626954);
+}
+
+if (typeof setRNGState == "function")
+ test();