package geo import ( "testing" "github.com/stretchr/testify/assert" ) func TestDist(t *testing.T) { t.Run("BerlinShanghai", func(t *testing.T) { berlin := Position{52.5243700, 13.4105300} shanghai := Position{31.2222200, 121.4580600} result := Dist(berlin, shanghai) assert.Equal(t, 8396, int(result)) }) }