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: loader_test.go
    path of file: ./repos/submarine/server/battle/src/resource
    
    the code of the file until where you have to start completion: package resource

import (
	"testing"

	. "github.com/smartystreets/goconvey/convey"
)

func TestLoader(t *testing.T) {
	Convey("Loader", t, func() {
		loader := newLoader()

		Convey("#LoadStageMesh", func() {
			Convey("with valid stage code", func() {
				Convey("should return the specified stage mesh", func() {
					mesh, err := loader.LoadMesh(1)
					So(mesh, ShouldNotBeNil)
					So(err, ShouldBeNil)
				})
			})

			Convey("with invalid stage code", func() {
				Convey("should return nil", func() {
					mesh, er
    
func TestLoader(t *testing.T) {
	Convey("Loader", t, func() {
		loader := newLoader()

		Convey("#LoadStageMesh", func() {
			Convey("with valid stage code", func() {
				Convey("should return the specified stage mesh", func() {
					mesh, err := loader.LoadMesh(1)
					So(mesh, ShouldNotBeNil)
					So(err, ShouldBeNil)
				})
			})

			Convey("with invalid stage code", func() {
				Convey("should return nil", func() {
					mesh, err := loader.LoadMesh(-1)
					So(mesh, ShouldBeNil)
					So(err, ShouldNotBeNil)
				})
			})
		})

		Convey("#LoadLightMap", func() {
			Convey("with valid stage code", func() {
				Convey("should return the specified light map", func() {
					lightMap, err := loader.LoadLightMap(1)
					So(lightMap, ShouldNotBeNil)
					So(err, ShouldBeNil)
				})
			})

			Convey("with invalid stage code", func() {
				Convey("should return nil", func() {
					lightMap, err := loader.LoadLightMap(-1)
					So(lightMap, ShouldBeNil)
					So(err, ShouldNotBeNil)
				})
			})
		})
	})
}