1 files changed, 17 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/parseFloat/S15.1.2.3_A3_T3.js b/js/src/tests/test262/built-ins/parseFloat/S15.1.2.3_A3_T3.js
new file mode 100644
index 0000000000..e6a1358041
--- /dev/null
+++ b/js/src/tests/test262/built-ins/parseFloat/S15.1.2.3_A3_T3.js
@@ -0,0 +1,17 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If neither Result(2) nor any prefix of Result(2) satisfies the syntax of a
+    StrDecimalLiteral (see 9.3.1), return NaN
+esid: sec-parsefloat-string
+description: parseFloat("wrong numbr format") return NaN
+---*/
+
+assert.sameValue(parseFloat(".x"), NaN, ".x");
+assert.sameValue(parseFloat("+x"), NaN, "+x");
+assert.sameValue(parseFloat("infinity"), NaN, "infinity");
+assert.sameValue(parseFloat("A"), NaN, "A");
+
+reportCompare(0, 0);