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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(new File(...) with target" in {
val f = File.createTempFile("eval", "target")
f.delete()
f.mkdir()
val e = new Eval(Some(f))
val sourceFile = TempFile.fromResourcePath("/OnePlusOne.scala")
val res: Int = e(sourceFile)
res mustEqual 2
// make sure it created a class file with the expected name
val targetFileName = f.getAbsolutePath() + File.separator + "Evaluator__" + sourceFile.getName + ".class"
val targetFile = new File(targetFileName)
targetFile.exists must be_==(true)
val targetMod = targetFile.lastModified
// eval again, make sure it works
val res2: Int = e(sourceFile)
// and make sure it didn't create a new file
f.listFiles.length mustEqual 1
// and make sure it didn't update the file
val targetFile2 = new File(targetFileName)
targetFile2.lastModified mustEqual targetMod
// touch source, ensure recompile
sourceFile.setLastModified(System.currentTimeMillis())
val res3: Int = e(sourceFile)
res3 mustEqual 2
// and make sure it didn't create a different file
f.listFiles.length mustEqual 1
// and make sure it updated the file
val targetFile3 = new File(targetFileName)
targetFile3.lastModified must be_>=(targetMod)
}
"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"
}
"recursive #include" in {
val derived = Eval[() => String](
TempFile.fromResourcePath("/Base.scala"),
TempFile.fromResourcePath("/IncludeInclude.scala"))
derived() mustEqual "hello"
derived.toString mustEqual "hello, joe; hello, joe"
}
"toSource returns post-processed code" in {
val derived = Eval.toSource(TempFile.fromResourcePath("/DerivedWithInclude.scala"))
derived must include("hello, joe")
derived must include("new Base")
}
"throws a compilation error when Ruby is #included" in {
Eval[() => String](
TempFile.fromResourcePath("RubyInclude.scala")) must throwA[Throwable]
}
}
}
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