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: hasher_test.go
    path of file: ./repos/rclone/backend/hasher
    
    the code of the file until where you have to start completion: package hasher_test

import (
	"os"
	"path/filepath"
	"testing"

	"github.com/rclone/rclone/backend/hasher"
	"github.com/rclone/rclone/fstest"
	"github.com/rclone/rclone/fstest/fstests"
	"github.com/rclone/rclone/lib/kv"

	_ "github.com/rclone/rclone/backend/all" // for integration tests
)

// TestIntegration runs integration test
    
func TestIntegration(t *testing.T) {
	if !kv.Supported() {
		t.Skip("hasher is not supported on this OS")
	}
	opt := fstests.Opt{
		RemoteName: *fstest.RemoteName,
		NilObject:  (*hasher.Object)(nil),
		UnimplementableFsMethods: []string{
			"OpenWriterAt",
			"OpenChunkWriter",
		},
		UnimplementableObjectMethods: []string{},
	}
	if *fstest.RemoteName == "" {
		tempDir := filepath.Join(os.TempDir(), "rclone-hasher-test")
		opt.ExtraConfig = []fstests.ExtraConfigItem{
			{Name: "TestHasher", Key: "type", Value: "hasher"},
			{Name: "TestHasher", Key: "remote", Value: tempDir},
		}
		opt.RemoteName = "TestHasher:"
		opt.QuickTestOK = true
	}
	fstests.Run(t, &opt)
	// test again with MaxAge = 0
	if *fstest.RemoteName == "" {
		opt.ExtraConfig = append(opt.ExtraConfig, fstests.ExtraConfigItem{Name: "TestHasher", Key: "max_age", Value: "0"})
		fstests.Run(t, &opt)
	}
}