31 lines
875 B
Nim
31 lines
875 B
Nim
import std/unittest
|
|
import codex/utils/optionalcast
|
|
|
|
suite "optional casts":
|
|
|
|
test "casting value to same type works":
|
|
check 42 as int == some 42
|
|
|
|
test "casting value to unrelated type evaluates to None":
|
|
check 42 as string == string.none
|
|
|
|
test "casting value to subtype works":
|
|
type
|
|
BaseType = ref object of RootObj
|
|
SubType = ref object of BaseType
|
|
let x: BaseType = SubType()
|
|
check x as SubType == SubType(x).some
|
|
|
|
test "casting to unrelated subtype evaluates to None":
|
|
type
|
|
BaseType = ref object of RootObj
|
|
SubType = ref object of BaseType
|
|
OtherType = ref object of BaseType
|
|
let x: BaseType = SubType()
|
|
check x as OtherType == OtherType.none
|
|
|
|
test "casting works on optional types":
|
|
check 42.some as int == some 42
|
|
check 42.some as string == string.none
|
|
check int.none as int == int.none
|