You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: poller_test.go
    path of file: ./repos/gev/poller
    
    the code of the file until where you have to start completion: // +build !windows

package poller

import (
	"errors"
	"testing"
	"time"
)

func TestPoller_
    
func TestPoller_Close(t *testing.T) {
	s, err := Create()
	if err != nil {
		t.Fatal(err)
	}

	if err = s.Close(); err == nil {
		t.Fatal("poller should be closed")
	}
}