diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/function-tosource-exprbody.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/function-tosource-exprbody.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,32 @@
+function f1(foo, bar) foo + bar;
+assertEq(f1.toString(), "function f1(foo, bar) foo + bar");
+assertEq(f1.toString(), f1.toSource());
+assertEq(decompileFunction(f1), f1.toString());
+assertEq(decompileBody(f1), "foo + bar;");
+// No semicolon on purpose
+function f2(foo, bar) foo + bar
+assertEq(f2.toString(), "function f2(foo, bar) foo + bar");
+assertEq(f2.toString(), f2.toSource());
+var f3 = function (foo, bar) foo + bar;
+assertEq(f3.toSource(), "(function (foo, bar) foo + bar)");
+assertEq(f3.toString(), "function (foo, bar) foo + bar");
+// No semicolon on purpose
+var f4 = function (foo, bar) foo + bar
+assertEq(f4.toSource(), "(function (foo, bar) foo + bar)");
+assertEq(f4.toString(), "function (foo, bar) foo + bar");
+var f5 = function (foo, bar) foo + bar   ;
+assertEq(f5.toSource(), "(function (foo, bar) foo + bar)");
+assertEq(f5.toString(), "function (foo, bar) foo + bar");
+var f6 = function (foo, bar) foo + bar; var a = 42
+assertEq(f6.toSource(), "(function (foo, bar) foo + bar)");
+assertEq(f6.toString(), "function (foo, bar) foo + bar");
+var f7 = function (foo, bar) foo + bar + '\
+long\
+string\
+test\
+'
+// a comment followed by some space
+
+
+assertEq(f7.toString(), "function (foo, bar) foo + bar + '\\\nlong\\\nstring\\\ntest\\\n'");
+assertEq(f7.toSource(), "(" + f7.toString() + ")");