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/* __ *\
** ________ ___ / / ___ __ ____ Scala.js Test Suite **
** / __/ __// _ | / / / _ | __ / // __/ (c) 2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ |/_// /_\ \ http://scala-js.org/ **
** /____/\___/_/ |_/____/_/ | |__/ /____/ **
** |/____/ **
\* */
package scala.scalajs.testsuite.jsinterop
import scala.scalajs.js
import org.scalajs.jasminetest.JasmineTest
import js.annotation.JSExport
object UndefOrTest extends JasmineTest {
def some[A](v: A): js.UndefOr[A] = v
def none[A]: js.UndefOr[A] = js.undefined
describe("scala.scalajs.js.UndefOr[A]") {
it("convert A to js.UndefOr[A]") {
val x: js.UndefOr[Int] = 42
expect(x.isEmpty).toBeFalsy
expect(x.isDefined).toBeTruthy
expect(x.nonEmpty).toBeTruthy
expect(x.get).toEqual(42)
}
it("convert undefined to js.UndefOr[A]") {
val x: js.UndefOr[Int] = js.undefined
expect(x.isEmpty).toBeTruthy
expect(x.isDefined).toBeFalsy
expect(x.nonEmpty).toBeFalsy
expect(() => x.get).toThrow
}
it("convert to js.Any when A <% js.Any") {
val x: js.UndefOr[Int] = 42
expect(x).toEqual(42)
val y: js.UndefOr[String] = js.undefined
expect(y).toBeUndefined
}
it("getOrElse") {
expect(some("hello").getOrElse("ko")).toEqual("hello")
expect(none[String].getOrElse("ok")).toEqual("ok")
var defaultComputed = false
expect(some("test") getOrElse {
defaultComputed = true
"ko"
}).toEqual("test")
expect(defaultComputed).toBeFalsy
}
it("orNull") {
expect(some("hello").orNull).toEqual("hello")
expect(none[String].orNull).toBeNull
}
it("map") {
expect(some(62).map(_ / 3)).toEqual(62 / 3)
expect(none[Int].map(_ / 3)).toBeUndefined
}
it("fold") {
expect(some(3).fold(10)(_ * 2)).toEqual(6)
expect(none[Int].fold(10)(_ * 2)).toEqual(10)
}
it("flatMap") {
def f(x: Int): js.UndefOr[Int] = if (x > 0) x+3 else js.undefined
expect(some(6).flatMap(f)).toEqual(9)
expect(some(-6).flatMap(f)).toBeUndefined
expect(none[Int].flatMap(f)).toBeUndefined
}
it("flatten") {
expect(some(some(7)).flatten.isDefined).toBeTruthy
expect(some(some(7)).flatten.get).toEqual(7)
expect(some(none[Int]).flatten.isDefined).toBeFalsy
expect(none[js.UndefOr[Int]].flatten.isDefined).toBeFalsy
}
it("filter") {
expect(some(7).filter(_ > 0).isDefined).toBeTruthy
expect(some(7).filter(_ > 0).get).toEqual(7)
expect(some(7).filter(_ < 0).isDefined).toBeFalsy
expect(none[Int].filter(_ < 0).isDefined).toBeFalsy
}
it("filterNot") {
expect(some(7).filterNot(_ < 0).isDefined).toBeTruthy
expect(some(7).filterNot(_ < 0).get).toEqual(7)
expect(some(7).filterNot(_ > 0).isDefined).toBeFalsy
expect(none[Int].filterNot(_ > 0).isDefined).toBeFalsy
}
it("exists") {
expect(some(7).exists(_ > 0)).toBeTruthy
expect(some(7).exists(_ < 0)).toBeFalsy
expect(none[Int].exists(_ > 0)).toBeFalsy
}
it("forall") {
expect(some(7).forall(_ > 0)).toBeTruthy
expect(some(7).forall(_ < 0)).toBeFalsy
expect(none[Int].forall(_ > 0)).toBeTruthy
}
it("foreach") {
var witness1 = 3
some(42).foreach(witness1 = _)
expect(witness1).toEqual(42)
var witness2 = 3
none[Int].foreach(witness2 = _)
expect(witness2).toEqual(3)
}
it("collect") {
expect(some("hello") collect {
case "hello" => "ok"
}).toEqual("ok")
expect(some("hello") collect {
case "notthis" => "ko"
}).toBeUndefined
expect(none[String] collect {
case "hello" => "ko"
}).toBeUndefined
}
it("collect should call guard at most once") {
var witness = 0
def guard(x: String) = {
witness += 1
true
}
expect(some("hello") collect {
case x @ "hello" if guard(x) => "ok"
}).toEqual("ok")
expect(witness).toEqual(1)
}
it("orElse") {
expect(some(true) orElse some(false)).toBeTruthy
expect(some("ok") orElse none).toEqual("ok")
expect(none orElse some("yes")).toEqual("yes")
expect(none orElse none).toBeUndefined
}
it("toList") {
import scala.scalajs.js.JSConverters._
expect(some("hello").toList.toJSArray).toEqual(js.Array("hello"))
expect(none[String].toList.toJSArray).toEqual(js.Array())
}
it("toLeft and toRight") {
expect(some("left").toLeft("right").isInstanceOf[Left[_, _]]).toBeTruthy
expect(none[String].toLeft("right").isInstanceOf[Right[_, _]]).toBeTruthy
expect(some("right").toRight("left").isInstanceOf[Right[_, _]]).toBeTruthy
expect(none[String].toRight("left").isInstanceOf[Left[_, _]]).toBeTruthy
}
it("toOption") {
expect(some("foo").toOption == Some("foo")).toBeTruthy
expect(none.toOption == None).toBeTruthy
}
}
describe("scala.scalajs.js.JSConverters.JSRichOption") {
import js.JSConverters._
it("should provide orUndefined") {
expect(Some("asdf").orUndefined).toEqual("asdf")
expect((None: Option[String]).orUndefined).toBeUndefined
// This doesn't work on 2.10, since it doesn't infer
// Nothing <:< js.Any to implicitly convert UndefOr[Nothing] to
// js.Any
// expect(None.orUndefined).toBeUndefined
}
}
}
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