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: hexdump_test.go
    path of file: ./repos/fq/internal/hexdump
    
    the code of the file until where you have to start completion: // TODO: fix tests
//go:build ignore
// +build ignore

package hexdump_test

import (
	"bytes"
	"fmt"
	"github.com/wader/fq/internal/asciiwriter"
	"github.com/wader/fq/internal/hexdump"
	"github.com/wader/fq/internal/hexpairwriter"
	"testing"
)

func TestHexdump(t *testing.T) {
	testCases := []struct {
		startOffset int
		writes      [][]byte
		expected    string
	}{
		{0, [][]byte{}, `
   |00 01 02 03|    |
0x0|           |    |
`[1:]},
		{0, [][]byte{{65}}, `
   |00 01 02 03|    |
0x0|41         |A   |
`[1:]},
		{0, [][]byte{{0, 0xff}},
			"0x0|00 ff      |..  |\n"},
		{0, [][]byte{{65, 66, 67}, {68}},
			"0x0|41 42 43 44|ABCD|\n"},
		{0, [][]byte{{65, 66, 67}, {68}, {69}}, "" +
			"0x0|41 42 43 44|ABCD|\n" +
			"04|45         |E   |\n"},

		{4, [][]byte{{65}},
			"04|41         |A   |\n"},
		{5, [][]byte{{65}},
			"04|   41      | A  |\n"},
		{6, [][]byte{{65
    
func TestHexdump(t *testing.T) {
	testCases := []struct {
		startOffset int
		writes      [][]byte
		expected    string
	}{
		{0, [][]byte{}, `
   |00 01 02 03|    |
0x0|           |    |
`[1:]},
		{0, [][]byte{{65}}, `
   |00 01 02 03|    |
0x0|41         |A   |
`[1:]},
		{0, [][]byte{{0, 0xff}},
			"0x0|00 ff      |..  |\n"},
		{0, [][]byte{{65, 66, 67}, {68}},
			"0x0|41 42 43 44|ABCD|\n"},
		{0, [][]byte{{65, 66, 67}, {68}, {69}}, "" +
			"0x0|41 42 43 44|ABCD|\n" +
			"04|45         |E   |\n"},

		{4, [][]byte{{65}},
			"04|41         |A   |\n"},
		{5, [][]byte{{65}},
			"04|   41      | A  |\n"},
		{6, [][]byte{{65}},
			"04|      41   |  A |\n"},
		{7, [][]byte{{65}},
			"04|         41|   A|\n"},
		{8, [][]byte{{65}},
			"08|41         |A   |\n"},

		{3, [][]byte{{65, 66, 67}, {68}, {69}}, "" +
			"00|         41|   A|\n" +
			"04|42 43 44 45|BCDE|\n"},
	}
	for _, tC := range testCases {
		t.Run(fmt.Sprintf("%v", tC.writes), func(t *testing.T) {
			b := &bytes.Buffer{}
			hd := hexdump.New(b, int64(tC.startOffset), 2, 16, 4,
				func(b byte) string { return hexpairwriter.Pair(b) },
				func(b byte) string { return asciiwriter.SafeASCII(b) },
				func(s string) string { return s },
				func(s string) string { return s },
				"|",
			)
			for _, w := range tC.writes {
				if _, err := hd.Write(w); err != nil {
					t.Fatal(err)
				}
			}
			hd.Close()
			actual := b.String()
			if tC.expected != actual {
				t.Errorf("expected %q, got %q", tC.expected, actual)
			}
		})
	}
}