updated FindPid and associated test

Author: radovskyb

process.go

@@ -129,6 +129,10 @@ func (p *Process) StartTty(ttyFd uintptr, notify chan<- struct{}) error {
 // FindPid finds and then sets the a process's pid based
 // on it's command, it's command's arguments and it's tty.
 func (p *Process) FindPid() error {
+	if p.Process == nil {
+		p.Process = &os.Process{}
+	}
+
 	if p.Cmd == "" {
 		return fmt.Errorf("process command is empty")
 	}

process_test.go

@@ -110,7 +110,12 @@ func TestFullCommand(t *testing.T) {
 }
 
 func TestFindPid(t *testing.T) {
-	proc := &Process{Cwd: cwd, Cmd: cmd, Args: args, Tty: currentTty, Process: &os.Process{}}
+	proc := &Process{
+		Cmd:  cmd,
+		Args: args,
+		Tty:  currentTty,
+	}
+
 	if err := proc.FindPid(); err != nil {
 		t.Error(err)
 	}