1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Math/log2/log2-basicTests.js b/js/src/tests/test262/built-ins/Math/log2/log2-basicTests.js
new file mode 100644
index 0000000000..3e0a33e014
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Math/log2/log2-basicTests.js
@@ -0,0 +1,36 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Math.Log2 with sample values.
+es6id: 20.2.2.23
+---*/
+
+assert.sameValue(Math.log2(-0), Number.NEGATIVE_INFINITY,
+  "Math.log2 produces incorrect output for -0");
+assert.sameValue(Math.log2(+0), Number.NEGATIVE_INFINITY,
+  "Math.log2 produces incorrect output for +0");
+assert.sameValue(Math.log2(-0.9), NaN,
+  "Math.log2 produces incorrect output for -0.9");
+assert.sameValue(Math.log2(NaN), NaN,
+  "Math.log2 produces incorrect output for NaN");
+assert.sameValue(Math.log2(-10), NaN,
+  "Math.log2 produces incorrect output for -10");
+assert.sameValue(Math.log2(-Infinity), NaN,
+  "Math.log2 produces incorrect output for -Infinity");
+assert.sameValue(Math.log2(null), Number.NEGATIVE_INFINITY,
+  "Math.log2 produces incorrect output for null");
+assert.sameValue(Math.log2(undefined), NaN,
+  "Math.log2 produces incorrect output for undefined");
+assert.sameValue(Math.log2(Number.POSITIVE_INFINITY), Number.POSITIVE_INFINITY,
+  "Math.log2 produces incorrect output for Number.POSITIVE_INFINITY");
+assert.sameValue(Math.log2(1), 0,
+  "Math.log2 produces incorrect output for 1");
+assert.sameValue(Math.log2(2.00), 1,
+  "Math.log2 produces incorrect output for 2.00");
+assert.sameValue(Math.log2(4.00), 2,
+  "Math.log2 produces incorrect output for 4.00");
+assert.sameValue(Math.log2(8.00), 3,
+  "Math.log2 produces incorrect output for 8.00");
+
+reportCompare(0, 0);