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evolution_test.go
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evolution_test.go
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package evolve
import (
"fmt"
"math/rand"
"reflect"
"testing"
)
func dev(g *Genome) *Individual {
return &Individual{
Genotype: g,
}
}
func TestNew(t *testing.T) {
g := Genome([]int{1, 2, 3})
e := New(&g, dev)
if e.Latest == nil {
fmt.Println("latest wasn't set")
t.FailNow()
}
if !reflect.DeepEqual(*e.Latest.Genotype, g) {
fmt.Println("latest was set incorrectly")
t.FailNow()
}
if len(e.Ancestry) != 0 {
fmt.Println("ancestry isn't empty")
t.FailNow()
}
if e.Development == nil {
fmt.Println("didn't save Development")
t.FailNow()
}
if e.Rand == nil {
fmt.Println("didn't initialize Rand")
t.FailNow()
}
}
func TestNewRand(t *testing.T) {
g := Genome([]int{1, 2, 3})
r := rand.New(rand.NewSource(12345))
e := NewRand(&g, dev, r)
if e.Rand != r {
fmt.Println("didn't save Rand")
t.FailNow()
}
}
func TestEvolve(t *testing.T) {
rand.Seed(1980)
g := Genome([]int{0, 0, 0, 0})
e := New(&g, dev)
ng := e.Evolve(3)
if ng == nil {
fmt.Println("next generation was nil")
t.FailNow()
}
if len(ng) != 3 {
fmt.Printf("wrong generation size: %v\n", len(ng))
t.FailNow()
}
for i, ind := range ng {
if reflect.DeepEqual(g, ind.Genotype) {
fmt.Printf("child %v didn't mutate\n", i)
t.FailNow()
}
}
}
func TestSelect(t *testing.T) {
rand.Seed(1980)
g := Genome([]int{0, 0, 0, 0})
e := New(&g, dev)
ng := e.Evolve(1)[0]
e.Select(&ng)
if ng != *e.Latest {
fmt.Printf("latest wasn't updated: %v vs %v\n", ng, *e.Latest)
t.FailNow()
}
if len(e.Ancestry) != 1 {
fmt.Printf("ancestry wasn't appended to\n")
t.FailNow()
}
if !reflect.DeepEqual(e.Ancestry[0], g) {
fmt.Printf("ancestry had the wrong thing added\n")
t.FailNow()
}
}