Created
November 18, 2015 19:21
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intro to scalacheck gens
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| import org.scalacheck.Gen | |
| //Gen a long | |
| val genLong = Gen.posNum[Long] | |
| // Gen a string | |
| val genString = Gen.alphaChar | |
| //Gen random length list of longs | |
| val genList = Gen.listOf(Gen.posNum[Long]) | |
| // Gen from a list of hard coded strings | |
| val genFriendName = | |
| Gen.oneOf("chrissy", "chandler", "mike", "sasha", "alex") | |
| case class Friend(age: Long, name: String) | |
| val genFriend = | |
| for { | |
| age <- Gen.posNum[Long] | |
| name <- genFriendName | |
| } yield { Friend(age, name) } | |
| scala> genLong.sample | |
| res6: Option[Long] = Some(48) | |
| scala> genString.sample | |
| res7: Option[Char] = Some(r) | |
| scala> genList.sample | |
| res8: Option[List[Long]] = Some(List(1, 71, 99, 6, 53, 65, 18, 68, 13, 70, 5, 95, 51, 61, 51, 47, 57, 30, 81, 26, 41, 18, 15, 68, 96)) | |
| scala> genFriendName.sample | |
| res9: Option[String] = Some(chrissy) | |
| scala> genFriend.sample | |
| res10: Option[Friend] = Some(Friend(75,alex)) |
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