Faking call to external static method in Pester

Faking_Static_Call_in_Pester.ps1

add-type -TypeDefinition @"
    using System;
    public static class KeyboardEventTestUtil {
        public static string keybd_event(byte bVk, byte bScan, UInt32 dwFlags, System.UIntPtr dwExtraInfo) {
            return string.Format("{0}:{1}:{2}:{3}", bVk,bScan,dwFlags,dwExtraInfo);
        }
    }
"@

describe "t" {
    it "b" { 
         [KeyboardEventTestUtil]::keybd_event(1,1,1,[UIntPtr]::Zero) | should be "1:1:1:0"
    }
}