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VectorTest.scala
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VectorTest.scala
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package scala.collection.immutable
import org.junit.Assert._
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
import org.junit.Test
import scala.collection.mutable.ListBuffer
import scala.reflect.{ClassTag, classTag}
@RunWith(classOf[JUnit4])
class VectorTest {
@Test
def hasCorrectDropAndTakeMethods(): Unit = {
val v = Vector(0) ++ Vector(1 to 64: _*)
assertEquals(Vector(0, 1), v take 2)
assertEquals(Vector(63, 64), v takeRight 2)
assertEquals(Vector(2 to 64: _*), v drop 2)
assertEquals(Vector(0 to 62: _*), v dropRight 2)
assertEquals(v, v take Int.MaxValue)
assertEquals(v, v takeRight Int.MaxValue)
assertEquals(Vector.empty[Int], v drop Int.MaxValue)
assertEquals(Vector.empty[Int], v dropRight Int.MaxValue)
assertEquals(Vector.empty[Int], v take Int.MinValue)
assertEquals(Vector.empty[Int], v takeRight Int.MinValue)
assertEquals(v, v drop Int.MinValue)
assertEquals(v, v dropRight Int.MinValue)
}
@Test
def hasCorrectPrependedAll(): Unit = {
val els = Vector(1 to 1000: _*)
for (i <- 0 until els.size) {
val (prefix, suffix) = els.splitAt(i)
assertEquals(els, prefix ++: suffix)
assertEquals(els, prefix.toList ++: suffix)
}
}
@Test
def factoryReuse(): Unit = {
assertSame(Vector.empty, Vector.empty)
assertSame(Vector.empty, Vector())
val m = Vector("a")
assertSame(m, Vector.from(m))
assertSame(m, Vector.apply(m: _*))
}
@Test def checkSearch: Unit = SeqTests.checkSearch(Vector(0 to 1000: _*), 15, implicitly[Ordering[Int]])
@Test
def emptyIteratorReuse(): Unit = {
assertSame(Vector.empty.iterator, Vector.empty.iterator)
assertSame(Vector.empty.iterator, Vector(1).drop(1).iterator)
}
@Test
def t11122_prependedAll_Iterator(): Unit = {
val i = Iterator.from(1).take(3)
assertEquals(Vector(1, 2, 3, 0), Vector(0).prependedAll(i))
}
@Test
def concat: Unit = {
assertEquals((1 to 100).toVector, (1 to 7).toVector concat (8 to 100).toVector)
}
@Test
def copyToArray: Unit = {
val array = Array.fill(100)(2)
Vector.fill(100)(1).copyToArray(array, 0, 100)
assertEquals(array.toSeq, Seq.fill(100)(1))
}
@Test
def vectorIteratorDrop(): Unit = {
val underlying = Vector(0 to 10010: _*)
val totalSize = underlying.size
for (start <- 1056 to 10000) {
val it = underlying.iterator.drop(start)
assertEquals(totalSize - start, it.knownSize)
assertEquals(totalSize - start, it.size)
assertTrue(it.hasNext)
assertEquals(start, it.next())
}
}
def intercept[T <: Throwable: ClassTag](fn: => Any): T = {
try {
fn
fail(s"expected a ${classTag[T].runtimeClass.getName} to be thrown")
???
} catch {
case x: T => x
}
}
@Test
def vectorIteratorDropToEnd(): Unit = {
val underlying = Vector(0)
for (start <- List(1,2,3,4,99)) {
{
var it = underlying.iterator.drop(start)
assertFalse(it.hasNext)
intercept[NoSuchElementException](it.next)
it = it.drop(0)
assertFalse(it.hasNext)
it = it.drop(1)
assertFalse(it.hasNext)
it = it.drop(99)
assertFalse(it.hasNext)
intercept[NoSuchElementException](it.next)
}
{
var it = underlying.iterator.drop(start)
intercept[NoSuchElementException](it.next)
it = it.drop(0)
it = it.drop(1)
it = it.drop(99)
intercept[NoSuchElementException](it.next)
}
}
}
@Test
def vectorIteratorRepeated(): Unit = {
val underlying = Vector(1 to 10001: _*)
for (stepSize <- List(0, 1, 2, 3, 4, 8, 10, 24, 32, 63, 64, 100)) {
var it:Iterator[Int] = underlying.iterator
for (stepCount <- 1 to 10) {
it = it.drop(stepSize)
assertTrue(it.hasNext)
val expected = (stepSize + 1) * stepCount
assertEquals(expected, it.next())
}
}
}
@Test
def vectorFill(): Unit = {
var i = 0
val test = Vector.fill(10){
i += 1
i * 10
}
assertEquals(List(10,20,30,40,50,60,70,80,90,100), test)
assertEquals(10, test.length)
assertEquals(10, test.head)
assertEquals(10, test(0))
assertEquals(20, test(1))
assertEquals(80, test(7))
assertEquals(100, test(9))
assertEquals(0, test.indexOf(10))
assertEquals(8, test.indexOf(90))
assertEquals(-1, test.indexOf(1000))
}
@Test
def tapEach(): Unit = {
val lb = ListBuffer[Int]()
val v =
Vector(1,2,3)
.tapEach(lb += _)
.tapEach(lb += _)
assertEquals(ListBuffer(1,2,3,1,2,3), lb)
assertEquals(Vector(1,2,3), v)
val f: Any => Unit = println
// test that type info is not lost
val x: Vector[Char] = Vector[Char]().tapEach(f)
}
@Test
def vectorIteratorTake(): Unit = {
val v = Vector.from(0 to 50)
for {
i <- -100 to 4000 by 40
j <- -100 to 4000 by 6
} {
val v2 = v.take(i)
assertArrayEquals(s"<${v2.length}>.take($j)", v2.toArray.take(j), v2.iterator.take(j).toArray)
}
}
@Test
def vectorIteratorDrop2(): Unit = {
val v = Vector.from(0 to 50)
for {
i <- -100 to 4000 by 40
j <- -100 to 4000 by 60
} {
val v2 = v.take(i)
assertArrayEquals(s"<${v2.length}>.drop($j)", v2.toArray.drop(j), v2.iterator.drop(j).toArray)
}
}
@Test
def vectorIteratorSlice(): Unit = {
val v = Vector.from(0 to 50)
for {
i <- -100 to 4000 by 40
j <- -100 to 4000 by 60
k <- -100 to 4000 by 60
} {
val v2 = v.take(i)
assertArrayEquals(s"<${v2.length}>.slice($j, $k)", v2.toArray.slice(j, k), v2.iterator.slice(j, k).toArray)
}
}
@Test
def i11600(): Unit = {
locally {
abstract class Base
class Derived1 extends Base
class Derived2 extends Base
val d1 = new Derived1
val d2 = new Derived2
locally {
val arraySeq = ArraySeq(d1)
val vector = Vector(arraySeq: _*)
assertEquals(arraySeq, ArraySeq(d1)) // ensure arraySeq is not mutated
assertEquals(vector.updated(0, d2), Vector(d2))
}
locally {
val list = List(d1)
val vector = Vector.from(list)
assertEquals(list, vector)
assertEquals(List(d2), vector.updated(0, d2))
}
}
locally {
// ensure boxing logic works:
val arraySeq = ArraySeq(1,2,3,4,5)
val vector = Vector(arraySeq: _*)
assertEquals(1 to 5, vector)
assertEquals(vector.updated(0, 20), Vector(20,2,3,4,5))
assertEquals(vector.updated(0, ""), Vector("",2,3,4,5))
assertEquals(1 to 5, arraySeq) // ensure arraySeq is not mutated
}
locally {
// ensure boxing logic works:
val arr = Array(1)
val vector = Vector.from(arr)
assertEquals(arr.toList, vector)
assertEquals(List(20), vector.updated(0, 20))
assertEquals(List(""), vector.updated(0, ""))
}
}
}