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package collection
import (
"reflect"
"testing"
)
func TestPushPop(t *testing.T) {
collection := []int{}
collection = Push(collection, 1)
collection = Push(collection, 2)
collection = Push(collection, 3)
want := []int{1, 2, 3}
if !reflect.DeepEqual(collection, want) {
t.Errorf("Want %+v, but got %+v", want, collection)
}
collection, e := Pop(collection)
if e != 3 {
t.Errorf("Want 3, but got %d", e)
}
collection, e = Pop(collection)
if e != 2 {
t.Errorf("Want 2, but got %d", e)
}
collection, e = Pop(collection)
if e != 1 {
t.Errorf("Want 1, but got %d", e)
}
collection, e = Pop(collection)
if e != 0 {
t.Errorf("Want 0, but got %d", e)
}
if len(collection) != 0 {
t.Errorf("Collection must be empty, but got %+v (len = %d)", collection, len(collection))
}
}
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