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package scala.runtime
import scala.language.postfixOps
import org.junit.Assert._
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
/** Tests Tuple?Zipped */
@RunWith(classOf[JUnit4])
class ZippedTest {
@Test
def crossZipped() {
val xs1 = List.range(1, 100)
val xs2 = xs1.view
val xs3 = xs1 take 10
val ss1 = Stream from 1
val ss2 = ss1.view
val ss3 = ss1 take 10
val as1 = 1 to 100 toArray
val as2 = as1.view
val as3 = as1 take 10
def xss1 = List[Seq[Int]](xs1, xs2, xs3, ss1, ss2, ss3, as1, as2, as3)
def xss2 = List[Seq[Int]](xs1, xs2, xs3, ss3, as1, as2, as3) // no infinities
def xss3 = List[Seq[Int]](xs2, xs3, ss3, as1) // representative sampling
for (cc1 <- xss1 ; cc2 <- xss2) {
val sum1 = (cc1, cc2).zipped map { case (x, y) => x + y } sum
val sum2 = (cc1, cc2).zipped map (_ + _) sum
assert(sum1 == sum2)
}
for (cc1 <- xss1 ; cc2 <- xss2 ; cc3 <- xss3) {
val sum1 = (cc1, cc2, cc3).zipped map { case (x, y, z) => x + y + z } sum
val sum2 = (cc1, cc2, cc3).zipped map (_ + _ + _) sum
assert(sum1 == sum2)
}
assert((ss1, ss1).zipped exists ((x, y) => true))
assert((ss1, ss1, ss1).zipped exists ((x, y, z) => true))
assert(!(ss1, ss2, 1 to 3).zipped.exists(_ + _ + _ > 100000))
assert((1 to 3, ss1, ss2).zipped.forall(_ + _ + _ > 0))
assert((ss1, 1 to 3, ss2).zipped.map(_ + _ + _).size == 3)
}
@Test
def test_si9379() {
class Boom {
private var i = -1
def inc = {
i += 1
if (i > 1000) throw new NoSuchElementException("Boom! Too many elements!")
i
}
}
val b = new Boom
val s = Stream.continually(b.inc)
// zipped.toString must allow s to short-circuit evaluation
assertTrue((s, s).zipped.toString contains s.toString)
}
}
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