1 files changed, 14 insertions, 0 deletions
diff --git a/Libraries/LibJS/Tests/modulo-basic.js b/Libraries/LibJS/Tests/modulo-basic.js
index 78410ee6c5..1b59a73419 100644
--- a/Libraries/LibJS/Tests/modulo-basic.js
+++ b/Libraries/LibJS/Tests/modulo-basic.js
@@ -2,6 +2,20 @@ function assert(x) { if (!x) throw 1; }
 
 try {
     assert(10 % 3 === 1);
+    assert(10.5 % 2.5 === 0.5);
+    assert(-0.99 % 0.99 === -0);
+
+    // Examples form MDN:
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
+    assert(12 % 5 === 2);
+    assert(-1 % 2 === -1);
+    assert(1 % -2 === 1);
+    assert(isNaN(NaN % 2);
+    assert(1 % 2 === 1);
+    assert(2 % 3 === 2);
+    assert(-4 % 2 === -0);
+    assert(5.5 % 2 === 1.5);
+
     console.log("PASS");
 } catch (e) {
     console.log("FAIL: " + e);