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package iter
import (
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/anacrolix/missinggo/slices"
)
func TestGroupByKey(t *testing.T) {
var ks []byte
gb := GroupBy(StringIterator("AAAABBBCCDAABBB"), nil)
for gb.Next() {
ks = append(ks, gb.Value().(Group).Key().(byte))
}
t.Log(ks)
require.EqualValues(t, "ABCDAB", ks)
}
func TestGroupByList(t *testing.T) {
var gs []string
gb := GroupBy(StringIterator("AAAABBBCCD"), nil)
for gb.Next() {
i := gb.Value().(Iterator)
var g string
for i.Next() {
g += string(i.Value().(byte))
}
gs = append(gs, g)
}
t.Log(gs)
}
func TestGroupByNiladicKey(t *testing.T) {
const s = "AAAABBBCCD"
gb := GroupBy(StringIterator(s), func(interface{}) interface{} { return nil })
gb.Next()
var ss []byte
g := ToSlice(ToFunc(gb.Value().(Iterator)))
slices.MakeInto(&ss, g)
assert.Equal(t, s, string(ss))
}
func TestNilEqualsNil(t *testing.T) {
assert.False(t, nil == uniqueKey)
}
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