io.circe.numbers.testing.IntegralString.scala Maven / Gradle / Ivy
/*
* Copyright 2024 circe
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.circe.numbers.testing
import org.scalacheck.Arbitrary
import org.scalacheck.Gen
/**
* An integral string with an optional leading minus sign and between 1 and 25
* digits (inclusive).
*/
final case class IntegralString(value: String)
object IntegralString {
implicit val arbitraryIntegralString: Arbitrary[IntegralString] = Arbitrary(
for {
sign <- Gen.oneOf("", "-")
nonZero <- Gen.choose(1, 9).map(_.toString)
/**
* We want between 1 and 25 digits, with extra weight on the numbers of
* digits around the size of `Long.MaxValue`.
*/
count <- Gen.chooseNum(0, 24, 17, 18, 19)
rest <- Gen.buildableOfN[String, Char](count, Gen.numChar)
} yield IntegralString(s"$sign$nonZero$rest")
)
}