Port SLDTest to Scalatest, start extracting test support code

Author: dwins

geocss/src/test/scala/RegressionTest.scala

@@ -1,5 +1,7 @@
 package org.geoscript.geocss
 
+import org.geoscript.geocss.testing._
+
 import collection.JavaConversions._
 
 import org.geotools.{ styling => gt }
@@ -27,9 +29,6 @@ class Regressions extends FunSuite with ShouldMatchers {
           "<none>")
     }
 
-  def containAll[A](x: A, xs: A*): Matcher[Traversable[A]] = 
-    (xs foldLeft (contain(x))) { (x, y) => x and contain(y) }
-
   test("Overlapping scales should produce a single FeatureTypeStyle") {
     val stylesheet = CssParser.parse(in("/scales.css"))
     stylesheet should be ('successful)