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: layermask_test.go
    path of file: ./repos/submarine/server/battle/lib/navmesh
    
    the code of the file until where you have to start completion: package navmesh

import (
	"testing"

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

func TestLayerMask(t *testing.T) {
	Convey("LayerMask", t, func() {
		Convey("#Has", func() 
    
func TestLayerMask(t *testing.T) {
	Convey("LayerMask", t, func() {
		Convey("#Has", func() {
			l := Layer02 | Layer14 | Layer16

			Convey("with contained layer mask", func() {
				Convey("should return true", func() {
					So(l.Has(Layer14), ShouldBeTrue)
					So(l.Has(Layer02|Layer16), ShouldBeTrue)
				})
			})

			Convey("with no-contained layer mask", func() {
				Convey("should return false", func() {
					So(l.Has(Layer08), ShouldBeFalse)
				})
			})
		})

		Convey("#Set", func() {
			Convey("should set bit flag of the specified layer mask", func() {
				l := LayerMask(0)
				l.Set(Layer09)
				So(l.Has(Layer09), ShouldBeTrue)
			})
		})

		Convey("#Clear", func() {
			Convey("should clear bit flag of the specified layer mask", func() {
				l := Layer03 | Layer07
				l.Clear(Layer03)
				So(l.Has(Layer03), ShouldBeFalse)
			})
		})
	})
}