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: time_test.go
    path of file: ./repos/coder/codersdk
    
    the code of the file until where you have to start completion: package codersdk_test

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"testing"
	"time"

	"github.com/stretchr/testify/requ
    
func TestNullTime_IsZero(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name  string
		input sql.NullTime
		want  bool
	}{
		{
			name:  "zero",
			input: sql.NullTime{},
			want:  true,
		},
		{
			name:  "not zero",
			input: sql.NullTime{Time: time.Now(), Valid: true},
			want:  false,
		},
		{
			name:  "null is zero",
			input: sql.NullTime{Time: time.Now(), Valid: false},
			want:  true,
		},
	}
	for _, tt := range tests {
		tt := tt
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()

			tr := codersdk.NullTime{NullTime: tt.input}
			require.Equal(t, tt.want, tr.IsZero())
		})
	}
}