List.get using rounding half up (#2002)

* List.get using rounding half up

* Upgrading to last changes in wollok-language

org.uqbar.project.wollok.lib/src/wollok/lang/WList.xtend

@@ -13,6 +13,7 @@ import org.uqbar.project.wollok.interpreter.nativeobj.JavaWrapper
 import static extension org.uqbar.project.wollok.interpreter.nativeobj.WollokJavaConversions.*
 import static extension org.uqbar.project.wollok.lib.WollokSDKExtensions.*
 import static extension org.uqbar.project.wollok.utils.WollokObjectUtils.*
+import java.math.RoundingMode
 
 /**
  * Native part of the wollok.lang.List class
@@ -27,8 +28,9 @@ class WList extends WCollection<List<WollokObject>> implements JavaWrapper<List<
 
 	def get(BigDecimal index) {
 		index.checkNotNull("get")
-		val convertedIndex = index.coerceToPositiveInteger
-		wrapped.get(convertedIndex)
+		index.coerceToPositiveInteger
+		val convertedIndex = index.setScale(0, RoundingMode.HALF_UP)
+		wrapped.get(convertedIndex.intValue)
 	}
 
 	def sortBy(WollokObject predicate) {

org.uqbar.project.wollok.tests/src/org/uqbar/project/wollok/tests/interpreter/NumbersConfigurationTruncateStrategyTestCase.xtend

@@ -58,7 +58,7 @@ class NumbersConfigurationTruncateStrategyTestCase extends AbstractWollokInterpr
 	@Test
 	def void listGet() {
 		'''
-		assert.equals("hola", ["saludo", "hola", "jua"].get(1.99999))
+		assert.equals("jua", ["saludo", "hola", "jua"].get(1.99999))
 		'''.test
 	}
 

org.uqbar.project.wollok/src/wollok/lang/Exception.xtend

@@ -32,6 +32,8 @@ class Exception {
 			.reverse
 	}
 
+	def initialize() {}
+
 	def getStackTrace() {
 		stackTrace.map[ 
 			exceptionObject.call("createStackTraceElement", contextDescription.javaToWollok, location.toString.javaToWollok)