io.circe.numbers.testing.JsonNumberString.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 arbitrary JSON number, represented as a string.
*/
final case class JsonNumberString(value: String)
object JsonNumberString {
private val genSign: Gen[String] = Gen.oneOf("", "-")
private val genIntegral: Gen[String] = Gen.oneOf(
Gen.const("0"),
for {
nonZero <- Gen.choose(1, 9).map(_.toString)
rest <- Gen.numStr
} yield s"$nonZero$rest"
)
private val genFractional: Gen[String] =
Gen.nonEmptyListOf(Gen.numChar).map(_.mkString).map("." + _)
private val genExponent: Gen[String] =
for {
e <- Gen.oneOf("e", "E")
s <- Gen.oneOf("", "+", "-")
n <- Gen.nonEmptyListOf(Gen.numChar).map(_.mkString)
} yield s"$e$s$n"
implicit val arbitraryJsonNumberString: Arbitrary[JsonNumberString] = Arbitrary(
Gen.frequency(
1 -> (for {
sign <- genSign
exponent <- genExponent
} yield JsonNumberString(s"${sign}0$exponent")),
10 -> (for {
sign <- genSign
integral <- genIntegral
fractional <- Gen.oneOf(Gen.const(""), genFractional)
exponent <- Gen.oneOf(Gen.const(""), genExponent)
} yield JsonNumberString(s"$sign$integral$fractional$exponent"))
)
)
}