You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

96 lines
1.5 KiB
Go

3 years ago
package opt
import (
"testing"
"unicode/utf8"
)
func TestNone(t *testing.T) {
s := None[string]()
if s.ok {
t.Error("should not be ok")
}
if _, ok := s.Open(); ok {
t.Error("should not be ok")
}
s2 := NoneOf("poop")
if s2.ok {
t.Error("should not be ok")
}
if _, ok := s2.Open(); ok {
t.Error("should not be ok")
}
}
func TestSome(t *testing.T) {
s := Some("poop")
if !s.ok {
t.Error("should be ok")
}
v, ok := s.Open()
if !ok {
t.Fatal("should be ok")
}
if v != "poop" {
t.Error("should be poop")
}
}
func TestBind(t *testing.T) {
count := Bind(utf8.RuneCountInString)
t.Run("bind some", func(t *testing.T) {
m := count(Some("poop"))
n, ok := m.Open()
if !ok {
t.Fatal("should be ok")
}
if n != 4 {
t.Errorf("wanted 4 but got %d instead", n)
}
})
t.Run("bind non", func(t *testing.T) {
m := count(None[string]())
n, ok := m.Open()
if ok {
t.Fatal("should not be ok")
}
if n != 0 {
t.Errorf("wanted 0 but got %d instead", n)
}
})
}
func TestNew(t *testing.T) {
count := Bind(utf8.RuneCountInString)
getCity := func(name string) (string, bool) {
if name == "Jordan" {
return "Chicago", true
}
return "", false
}
if n, ok := count(New(getCity("Jordan"))).Open(); !ok {
t.Errorf("should be ok")
} else {
if n != 7 {
t.Errorf("what")
}
}
if n, ok := count(New(getCity("poopface jones"))).Open(); ok {
t.Errorf("should not be ok")
} else {
if n != 0 {
t.Errorf("why do we have this value %d", n)
}
}
}