Scalatest Generator-driven 属性 检查 Eclipse 中的编译错误。好的，在 SBT 中。
Scalatest Generator-driven property checks compilation error in Eclipse. Ok in SBT.
我正在尝试使用 ScalaTest 进行基于 属性 的测试。我已经使用 2 个自定义生成器编写了一些测试用例，它们运行良好。然而，当我用一个自定义生成器定义一个 forAll 时，如下所示：
it should "generate a given number of weights whose total is less than the given total when the given number is > 0, with default upperBound, lowerBound and total" in {
// TODO: Find out why single parameter does not work. maxSize here is a workaround
forAll(reasonableSizes) { (size: Int) =>
whenever(size > 0) {
val range = random.nextLong.abs
val values = DataGenerator.generatePartialWeights(size)
values should have length size
every(values) should (be >= BigDecimal(0) and be <= BigDecimal(1))
values.sum should be < BigDecimal(1)
}
}
}
我在Eclipse中编译报错如下：
type mismatch; found : (org.scalacheck.Gen[A],
DataGeneratorTest.this.PropertyCheckConfigParam*) required: ?0C[?0E]
Note that implicit conversions are not applicable because they are
ambiguous: both method ArrowAssoc in object Predef of type [A](self:
A)ArrowAssoc[A] and method Ensuring in object Predef of type
[A](self: A)Ensuring[A] are possible conversion functions from
(org.scalacheck.Gen[A],
DataGeneratorTest.this.PropertyCheckConfigParam*) to ?0C[?0E]
我尝试了 ScalaTest 文档中的示例：http://www.scalatest.org/user_guide/generator_driven_property_checks
通过
it should "testing" in {
val evenInts = for (n <- Gen.choose(-1000, 1000)) yield 2 * n
forAll(evenInts) { (n) => n % 2 should equal(0) }
}
得到同样的错误。
但是我用SBT编译的时候没有报错。
sbt compile
Java HotSpot(TM) 64-Bit Server
[info] Loading project definition from C:\xxx [info] Set current project to cree (in build file:/C:/xxx)
[info] Compiling 20 Scala sources to
C:\xxx\target\scala-2.11\classes...
[success] Total time: 37 s, completed 26-Mar-2015 20:04:15
我不确定哪里出了问题。有人可以帮忙吗？谢谢。
环境：
- OS: Windows 7 企业版 SP1 64 位
- Scala IDE: 4.0.0
- Scala 版本：2.11.6
- ScalaTest 版本：2.2.4
- ScalaCheck 版本：1.12.2
你能不能post完整测试class？
我 运行 遇到了完全相同的问题，发现与使用 Inspectors 特性以及 PropertyChecks 特性存在冲突。从我的测试 class 中删除 Inspectors 特性后，一切正常。
abstract class UnitSpec extends FunSpec
with Matchers
with OptionValues
with Inside
// with Inspectors <= this conflicts with PropertyChecks trait
with PropertyChecks
with ValidationMatchers
with MockFactory
我正在尝试使用 ScalaTest 进行基于 属性 的测试。我已经使用 2 个自定义生成器编写了一些测试用例，它们运行良好。然而，当我用一个自定义生成器定义一个 forAll 时，如下所示：
it should "generate a given number of weights whose total is less than the given total when the given number is > 0, with default upperBound, lowerBound and total" in {
// TODO: Find out why single parameter does not work. maxSize here is a workaround
forAll(reasonableSizes) { (size: Int) =>
whenever(size > 0) {
val range = random.nextLong.abs
val values = DataGenerator.generatePartialWeights(size)
values should have length size
every(values) should (be >= BigDecimal(0) and be <= BigDecimal(1))
values.sum should be < BigDecimal(1)
}
}
}
我在Eclipse中编译报错如下：
type mismatch; found : (org.scalacheck.Gen[A], DataGeneratorTest.this.PropertyCheckConfigParam*) required: ?0C[?0E] Note that implicit conversions are not applicable because they are ambiguous: both method ArrowAssoc in object Predef of type [A](self: A)ArrowAssoc[A] and method Ensuring in object Predef of type [A](self: A)Ensuring[A] are possible conversion functions from (org.scalacheck.Gen[A], DataGeneratorTest.this.PropertyCheckConfigParam*) to ?0C[?0E]
我尝试了 ScalaTest 文档中的示例：http://www.scalatest.org/user_guide/generator_driven_property_checks
通过
it should "testing" in {
val evenInts = for (n <- Gen.choose(-1000, 1000)) yield 2 * n
forAll(evenInts) { (n) => n % 2 should equal(0) }
}
得到同样的错误。
但是我用SBT编译的时候没有报错。
sbt compile Java HotSpot(TM) 64-Bit Server [info] Loading project definition from C:\xxx [info] Set current project to cree (in build file:/C:/xxx) [info] Compiling 20 Scala sources to C:\xxx\target\scala-2.11\classes...
[success] Total time: 37 s, completed 26-Mar-2015 20:04:15
我不确定哪里出了问题。有人可以帮忙吗？谢谢。
环境：
- OS: Windows 7 企业版 SP1 64 位
- Scala IDE: 4.0.0
- Scala 版本：2.11.6
- ScalaTest 版本：2.2.4
- ScalaCheck 版本：1.12.2
你能不能post完整测试class？
我 运行 遇到了完全相同的问题，发现与使用 Inspectors 特性以及 PropertyChecks 特性存在冲突。从我的测试 class 中删除 Inspectors 特性后，一切正常。
abstract class UnitSpec extends FunSpec
with Matchers
with OptionValues
with Inside
// with Inspectors <= this conflicts with PropertyChecks trait
with PropertyChecks
with ValidationMatchers
with MockFactory