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: deleter_test.go
    path of file: ./repos/storj/storagenode/pieces
    
    the code of the file until where you have to start completion: // Copyright (C) 2020 Storj Labs, Inc.
// See LICENSE for copying information.

package pieces_test

import (
	"context"
	"testing"

	"github.com/stretchr/testify/require"
	"go.uber.org/zap/zaptest"

	"storj.io/common/memory"
	"storj.io/common/pb"
	"storj.io/common/storj"
	"storj.io
    
func TestDeleter(t *testing.T) {
	cases := []struct {
		testID        string
		deleteToTrash bool
	}{
		{
			testID:        "regular-delete",
			deleteToTrash: false,
		}, {
			testID:        "trash-delete",
			deleteToTrash: true,
		},
	}
	for _, c := range cases {
		testCase := c
		t.Run(testCase.testID, func(t *testing.T) {
			storagenodedbtest.Run(t, func(ctx *testcontext.Context, t *testing.T, db storagenode.DB) {
				log := zaptest.NewLogger(t)
				dir, err := filestore.NewDir(log, ctx.Dir("piecedeleter"))
				require.NoError(t, err)

				blobs := filestore.New(log, dir, filestore.DefaultConfig)
				defer ctx.Check(blobs.Close)

				v0PieceInfo, ok := db.V0PieceInfo().(pieces.V0PieceInfoDBForTest)
				require.True(t, ok, "V0PieceInfoDB can not satisfy V0PieceInfoDBForTest")

				conf := pieces.Config{
					WritePreallocSize: 4 * memory.MiB,
					DeleteToTrash:     testCase.deleteToTrash,
				}
				store := pieces.NewStore(log, pieces.NewFileWalker(log, blobs, v0PieceInfo), nil, blobs, v0PieceInfo, db.PieceExpirationDB(), nil, conf)
				deleter := pieces.NewDeleter(log, store, 1, 10000)
				defer ctx.Check(deleter.Close)
				deleter.SetupTest()

				require.NoError(t, deleter.Run(ctx))
				satelliteID := testrand.NodeID()
				pieceID := testrand.PieceID()

				data := testrand.Bytes(memory.KB)
				w, err := store.Writer(ctx, satelliteID, pieceID, pb.PieceHashAlgorithm_SHA256)
				require.NoError(t, err)
				_, err = w.Write(data)
				require.NoError(t, err)
				require.NoError(t, w.Commit(ctx, &pb.PieceHeader{}))

				// Delete the piece we've created
				unhandled := deleter.Enqueue(ctx, satelliteID, []pb.PieceID{pieceID})
				require.Equal(t, 0, unhandled)

				// wait for test hook to fire twice
				deleter.Wait(ctx)

				// check that piece is not available
				r1, err := store.Reader(ctx, satelliteID, pieceID)
				require.Error(t, err)
				require.Nil(t, r1)

				defer func() {
					if r1 != nil {
						ctx.Check(r1.Close)
					}
				}()

				// check the trash
				err = store.RestoreTrash(ctx, satelliteID)
				require.NoError(t, err)

				r2, err := store.Reader(ctx, satelliteID, pieceID)
				defer func() {
					if r2 != nil {
						ctx.Check(r2.Close)
					}
				}()
				if !testCase.deleteToTrash {
					require.Error(t, err)
					require.Nil(t, r2)
				}
				if testCase.deleteToTrash {
					require.NoError(t, err)
					require.NotNil(t, r2)
				}

				// Also delete a random non-existent piece, so we know it doesn't blow up when this happens
				unhandled = deleter.Enqueue(ctx, satelliteID, []pb.PieceID{testrand.PieceID()})
				require.Equal(t, 0, unhandled)
			})
		})
	}
}