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: io_writer_parameters.go
    path of file: ./repos/gotests/testdata/goldens
    
    the code of the file until where you have to start completion: package testdata

import (
	"bytes"
	"testing"
)

func TestBar_Write(t *testing.T) {
	tests := []struct {
		name    string
		b       *Bar
		wantW   string
		wantErr bool
	}{
		// TODO: Add test cases.
	}
	for _, tt := range tests {
		b := &Bar{}
		w := &bytes.Buffer{}
		if err := b.Write(w); (err != nil) != tt.wantErr {
			t.Errorf("%q. Bar.Write() e
    
func TestBar_Write(t *testing.T) {
	tests := []struct {
		name    string
		b       *Bar
		wantW   string
		wantErr bool
	}{
		// TODO: Add test cases.
	}
	for _, tt := range tests {
		b := &Bar{}
		w := &bytes.Buffer{}
		if err := b.Write(w); (err != nil) != tt.wantErr {
			t.Errorf("%q. Bar.Write() error = %v, wantErr %v", tt.name, err, tt.wantErr)
			continue
		}
		if gotW := w.String(); gotW != tt.wantW {
			t.Errorf("%q. Bar.Write() = %v, want %v", tt.name, gotW, tt.wantW)
		}
	}
}