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package com.twitter.util
import org.specs.Specification
import java.io.{File, FileOutputStream}
import com.twitter.io.TempFile
object EvalSpec extends Specification {
"Evaluator" should {
"apply('expression')" in {
(new Eval).apply[Int]("1 + 1") mustEqual 2
}
"apply(new File(...))" in {
(new Eval).apply[Int](TempFile.fromResourcePath("/OnePlusOne.scala")) mustEqual 2
}
"apply(new File(...), new File(...))" in {
val derived = (new Eval).apply[() => String](
TempFile.fromResourcePath("/Base.scala"),
TempFile.fromResourcePath("/Derived.scala"))
derived() mustEqual "hello"
}
"apply(InputStream)" in {
(new Eval).apply[Int](getClass.getResourceAsStream("/OnePlusOne.scala")) mustEqual 2
}
"inPlace('expression')" in {
// Old object API works
Eval.compile("object Doubler { def apply(n: Int) = n * 2 }")
Eval.inPlace[Int]("Doubler(2)") mustEqual 4
Eval.inPlace[Int]("Doubler(14)") mustEqual 28
// New class API fails
// val eval = new Eval
// eval.compile("object Doubler { def apply(n: Int) = n * 2 }")
// eval.inPlace[Int]("Doubler(2)") mustEqual 4
// eval.inPlace[Int]("Doubler(14)") mustEqual 28
}
"check" in {
(new Eval).check("23") mustEqual ()
(new Eval).check("invalid") must throwA[Eval.CompilerException]
}
"#include" in {
val derived = Eval[() => String](
TempFile.fromResourcePath("/Base.scala"),
TempFile.fromResourcePath("/DerivedWithInclude.scala"))
derived() mustEqual "hello"
derived.toString mustEqual "hello, joe"
}
"throws a compilation error when Ruby is #included" in {
Eval[() => String](
TempFile.fromResourcePath("RubyInclude.scala")) must throwA[Throwable]
}
}
}
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