Fix XMLEventReader does not handle ' properly

Fixes #72

Author: fehmicansaglam

jvm/src/test/scala/scala/xml/pull/XMLEventReaderTest.scala

@@ -168,4 +168,40 @@ class XMLEventReaderTest {
     while(er.hasNext) er.next()
     er.stop()
   }
+
+  @Test
+  def entityRefTest: Unit = {
+    val source = Source.fromString("<text>&quot;&apos;&lt;&gt;&amp;</text>")
+    val er = new XMLEventReader(source)
+
+    assertTrue(er.next match {
+      case EvElemStart(_, "text", _, _) => true
+      case _ => false
+    })
+    assertTrue(er.next match {
+      case EvEntityRef("quot") => true
+      case e => false
+    })
+    assertTrue(er.next match {
+      case EvEntityRef("apos") => true
+      case _ => false
+    })
+    assertTrue(er.next match {
+      case EvEntityRef("lt") => true
+      case _ => false
+    })
+    assertTrue(er.next match {
+      case EvEntityRef("gt") => true
+      case _ => false
+    })
+    assertTrue(er.next match {
+      case EvEntityRef("amp") => true
+      case _ => false
+    })
+    assertTrue(er.next match {
+      case EvElemEnd(_, "text") => true
+      case _ => false
+    })
+    assert(er.isEmpty)
+  }
 }

shared/src/main/scala/scala/xml/Utility.scala

@@ -93,7 +93,7 @@ object Utility extends AnyRef with parsing.TokenTests {
      * For reasons unclear escape and unescape are a long ways from
      * being logical inverses.
      */
-    val pairs = Map(
+    private val pairs = Map(
       "lt" -> '<',
       "gt" -> '>',
       "amp" -> '&',

shared/src/main/scala/scala/xml/parsing/MarkupParser.scala

@@ -12,7 +12,7 @@ package parsing
 
 import scala.io.Source
 import scala.xml.dtd._
-import Utility.Escapes.{ pairs => unescape }
+import Utility.Escapes.unescMap
 
 /**
  * An XML parser.
@@ -470,11 +470,12 @@ trait MarkupParser extends MarkupParserCommon with TokenTests {
             case _ => // EntityRef
               val n = xName
               xToken(';')
-
-              if (unescape contains n) {
-                handle.entityRef(tmppos, n)
-                ts &+ unescape(n)
-              } else push(n)
+              unescMap.get(n) match {
+                case None => push(n)
+                case Some(theChar) =>
+                  handle.entityRef(tmppos, n)
+                  ts &+ theChar
+              }
           }
         case _ => // text content
           appendText(tmppos, ts, xText)