unittests D2.065.0 window 7

[Phillip Shelton via Digitalmars-d-learn]

I have the following code in a file called ex43.d

dstring toFront(dstring str, in dchar letter)
{
dstring result;
return result;
}
unittest
{
immutable str = "hello"d;
assert(toFront(str, 'h') == "hello");
assert(toFront(str, 'o') == "ohell");
assert(toFront(str, 'l') == "llheo");
}
void main()
{}

When I compile this code with dmd -run ex43.d -w -unittest there 
is no output.

Is there some path that needs to be added to the PATH variable?

Phillip