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object Test {
import scala.collection.mutable.{ArrayBuffer, Buffer, BufferProxy, ListBuffer}
def main(args: Array[String]): Unit = {
test(collection.mutable.ArrayBuffer[String]())
test(collection.mutable.ListBuffer[String]())
class BBuf(z:ListBuffer[String]) extends BufferProxy[String] {
def self = z
}
test(new BBuf(collection.mutable.ListBuffer[String]()))
}
def test(x: Buffer[String]): Unit = {
// testing method +=
x += "one"
assert(x(0) == "one", "retrieving 'one'")
assert(x.length == 1, "length A")
x += "two"
assert(x(1) == "two", "retrieving 'two'")
assert(x.length == 2, "length B")
// testing method -= (removing last element)
x -= "two"
assert(x.length == 1, "length C")
try { x(1); sys.error("no exception for removed element") }
catch { case i:IndexOutOfBoundsException => }
try { x.remove(1); sys.error("no exception for removed element") }
catch { case i:IndexOutOfBoundsException => }
x += "two2"
assert(x.length == 2, "length D")
// removing first element
x.remove(0)
assert(x.length == 1, "length E")
// toList
assert(x.toList == List("two2"), "toList")
// clear
x.clear()
assert(x.length == 0, "length 0")
assert(x.isEmpty, "isEmpty")
// copyToBuffer
x += "a"
x += "b"
val dest = new ArrayBuffer[String]
x.copyToBuffer(dest)
assert(List("a", "b") == dest.toList, "dest")
assert(List("a", "b") == x.toList, "source")
}
}
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