return 0, errors.New("Test")
}

func TestError(t *testing.T) {
	b := &bytes.Buffer{}
	f := NewWriter(b)
	f.Write([]string{"abc"})
	f.Flush()
	err := f.Error()

	if err != nil {
		t.Errorf("Unexpected error: %s\n", err)
	}

	f = NewWriter(errorWriter{})
	f.Write([]string{"abc"})
	f.Flush()
	err = f.Error()

	if err == nil {
		t.Error("Error should not be nil")
	}

	// Create a buffer to write our archive to.
	buf := new(bytes.Buffer)

	// Create a new zip archive.
	w := zip.NewWriter(buf)

	// Register a custom Deflate compressor.
	w.RegisterCompressor(zip.Deflate, func(out io.Writer) (io.WriteCloser, error) {
		return flate.NewWriter(out, flate.BestCompression)
	})

	// Proceed to add files to w.

//
// Callers that wish to set the fields in Writer.Header must do so before
// the first call to Write, Flush, or Close.
func NewWriter(w io.Writer) *Writer {
	z, _ := NewWriterLevel(w, DefaultCompression)
	return z
}

// NewWriterLevel is like [NewWriter] but specifies the compression level instead
// of assuming [DefaultCompression].
//
// The compression level can be [DefaultCompression], [NoCompression], [HuffmanOnly]

	var want bytes.Buffer
	w, err := NewWriter(&want, level)
	if err != nil {
		t.Fatalf("NewWriter: level %d: %v", level, err)
	}

	// Output written 3 times.
	w.Write(in)
	w.Write(in)
	w.Write(in)
	w.Close()

	for ; offset <= 256; offset *= 2 {
		w, err := NewWriter(io.Discard, level)
		if err != nil {
			t.Fatalf("NewWriter: level %d: %v", level, err)
		}

		t.Fatal(err)
	}

}

// Multiple gzip files concatenated form a valid gzip file.
func TestConcat(t *testing.T) {
	var buf bytes.Buffer
	w := NewWriter(&buf)
	w.Write([]byte("hello "))
	w.Close()
	w = NewWriter(&buf)
	w.Write([]byte("world\n"))
	w.Close()

	r, err := NewReader(&buf)
	if err != nil {
		t.Fatal(err)
	}
	data, err := io.ReadAll(r)

}

func ExampleWriter() {
	records := [][]string{
		{"first_name", "last_name", "username"},
		{"Rob", "Pike", "rob"},
		{"Ken", "Thompson", "ken"},
		{"Robert", "Griesemer", "gri"},
	}

	w := csv.NewWriter(os.Stdout)

	for _, record := range records {
		if err := w.Write(record); err != nil {
			log.Fatalln("error writing record to csv:", err)
		}
	}

					}
				})
			}
		})
	}
}

func TestWriterReturnValues(t *testing.T) {
	w := NewWriter(io.Discard, LSB, 8)
	n, err := w.Write([]byte("asdf"))
	if n != 4 || err != nil {
		t.Errorf("got %d, %v, want 4, nil", n, err)
	}
}

func TestSmallLitWidth(t *testing.T) {
	w := NewWriter(io.Discard, LSB, 2)
	if _, err := w.Write([]byte{0x03}); err != nil {
		t.Fatalf("write a byte < 1<<2: %v", err)

// license that can be found in the LICENSE file.

package tar

import (
	"bytes"
	"io"
	"testing"
)

func FuzzReader(f *testing.F) {
	b := bytes.NewBuffer(nil)
	w := NewWriter(b)

type Writer struct {
	Comma   rune // Field delimiter (set to ',' by NewWriter)
	UseCRLF bool // True to use \r\n as the line terminator
	w       *bufio.Writer
}

// NewWriter returns a new Writer that writes to w.
func NewWriter(w io.Writer) *Writer {
	return &Writer{
		Comma: ',',
		w:     bufio.NewWriter(w),
	}
}

// Write writes a single CSV record to w along with any necessary quoting.

// license that can be found in the LICENSE file.

package zlib_test

import (
	"bytes"
	"compress/zlib"
	"fmt"
	"io"
	"os"
)

func ExampleNewWriter() {
	var b bytes.Buffer

	w := zlib.NewWriter(&b)
	w.Write([]byte("hello, world\n"))
	w.Close()
	fmt.Println(b.Bytes())
	// Output: [120 156 202 72 205 201 201 215 81 40 207 47 202 73 225 2 4 0 0 255 255 33 231 4 147]
}

func ExampleNewReader() {