public void Run_ExistingEnvironmentPathIsEmptyString_PathToScriptAddedToEnvironmentPath()
{
CreateScript();
fakeScriptFileName.GetScriptDirectoryReturnValue = @"d:\projects\myproject\packages\test\tools";
fakeSession.SetEnvironmentPath(String.Empty);
RunScript();
string actualEnvironmentPath = fakeSession.GetEnvironmentPath();
string expectedEnvironmentPath = @"d:\projects\myproject\packages\test\tools";
Assert.AreEqual(expectedEnvironmentPath, actualEnvironmentPath);
}