[JENKINS-48463] Added additional unit tests for verifying xml v1.1 compatibility

  - verify can still read xml 1.0
  - verify can read xml 1.1
  - verify can read xml 1.1 with 'special' characters
  - verify that jenkins can start with a config.xml having
    <?xml version='1.1'> and special characters

core/src/test/java/hudson/XmlFileTest.java

+package hudson;
+
+import hudson.model.Node;
+import hudson.util.XStream2;
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+
+import jenkins.model.Jenkins;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+public class XmlFileTest {
+
+    @Test
+    public void canReadXml1_0Test() throws IOException {
+        URL configUrl = getClass().getResource("/hudson/config_1_0.xml");
+        File configFile = new File(configUrl.getFile());
+        XStream2  xs = new XStream2();
+        xs.alias("hudson", Jenkins.class);
+
+        XmlFile xmlFile =  new XmlFile(xs, configFile);
+        if (xmlFile.exists()) {
+            Node n = (Node) xmlFile.read();
+            assertThat(n.getNumExecutors(), is(2));
+            assertThat(n.getMode().toString(), is("NORMAL"));
+        }
+    }
+
+    @Test
+    public void canReadXml1_1Test() throws IOException {
+        URL configUrl = getClass().getResource("/hudson/config_1_1.xml");
+        File configFile = new File(configUrl.getFile());
+        XStream2  xs = new XStream2();
+        xs.alias("hudson", Jenkins.class);
+
+        XmlFile xmlFile =  new XmlFile(xs, configFile);
+        if (xmlFile.exists()) {
+            Node n = (Node) xmlFile.read();
+            assertThat(n.getNumExecutors(), is(2));
+            assertThat(n.getMode().toString(), is("NORMAL"));
+        }
+    }
+
+    @Test
+    @Ignore
+    //TODO: find a way to complete this test
+    public void xml1_0ConfigMigrateTo1_1Test() throws IOException {
+        URL configUrl = getClass().getResource("/hudson/config_1_0.xml");
+        File configFile = new File(configUrl.getFile());
+        XStream2  xs = new XStream2();
+        xs.alias("hudson", Jenkins.class);
+
+        XmlFile xmlFile =  new XmlFile(xs, configFile);
+        if (xmlFile.exists()) {
+            Node n = (Node) xmlFile.read();
+            assertThat(n.getNumExecutors(), is(2));
+            assertThat(n.getMode().toString(), is("NORMAL"));
+            // this fails, because configFile.getParent() returns null....how do i fix?
+            n.save();
+            // Now verify that the node is showing <?xml version='1.1'> tag
+        }
+
+    }
+
+    @Test
+    public void canReadXmlWithControlCharsTest() throws IOException {
+        URL configUrl = getClass().getResource("/hudson/confg_1_1_with_special_chars.xml");
+        File configFile = new File(configUrl.getFile());
+        XStream2  xs = new XStream2();
+        xs.alias("hudson", Jenkins.class);
+
+        XmlFile xmlFile =  new XmlFile(xs, configFile);
+        if (xmlFile.exists()) {
+            Node n = (Node) xmlFile.read();
+            assertThat(n.getNumExecutors(), is(2));
+            assertThat(n.getMode().toString(), is("NORMAL"));
+            assertThat(n.getLabelString(), is("LESS_TERMCAP_mb=\u001B[01;31m"));
+        }
+    }
+}

core/src/test/resources/hudson/confg_1_1_with_special_chars.xml

+<?xml version='1.1' encoding='UTF-8'?>
+<hudson>
+    <disabledAdministrativeMonitors/>
+    <version>1.480.1</version>
+    <numExecutors>2</numExecutors>
+    <mode>NORMAL</mode>
+    <label>LESS_TERMCAP_mb=&#x1b;[01;31m</label>
+    <!-- Yeah, we deleted a lot of this ... fine for testing. -->
+</hudson>
\ No newline at end of file

core/src/test/resources/hudson/config_1_0.xml

+<?xml version='1.0' encoding='UTF-8'?>
+<hudson>
+    <disabledAdministrativeMonitors/>
+    <version>1.480.1</version>
+    <numExecutors>2</numExecutors>
+    <mode>NORMAL</mode>
+    <!-- Yeah, we deleted a lot of this ... fine for testing. -->
+</hudson>
\ No newline at end of file

core/src/test/resources/hudson/config_1_1.xml

+<?xml version='1.1' encoding='UTF-8'?>
+<hudson>
+    <disabledAdministrativeMonitors/>
+    <version>1.480.1</version>
+    <numExecutors>2</numExecutors>
+    <mode>NORMAL</mode>
+    <!-- Yeah, we deleted a lot of this ... fine for testing. -->
+</hudson>
\ No newline at end of file

pom.xml

@@ -129,7 +129,7 @@ THE SOFTWARE.
       <dependency>
         <groupId>org.apache.ant</groupId>
         <artifactId>ant</artifactId>
-        <version>1.8.4</version>
+        <version>1.9.2</version>
       </dependency>
 
       <dependency>

test/src/test/java/hudson/XMLFileTest.java

+package hudson;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.jvnet.hudson.test.JenkinsRule;
+import org.jvnet.hudson.test.recipes.LocalData;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+public class XMLFileTest {
+
+    @Rule
+    public JenkinsRule j = new JenkinsRule();
+
+    @Test
+    @LocalData
+    public void canStartWithXml_1_1_ConfigsTest() {
+
+        assertThat(j.jenkins.getLabelString(),is("LESS_TERMCAP_mb=\u001B[01;31m"));
+
+    }
+}

test/src/test/resources/hudson/XMLFileTest/canStartWithXml_1_1_ConfigsTest/config.xml

+<?xml version='1.1' encoding='UTF-8'?>
+<hudson>
+    <disabledAdministrativeMonitors/>
+    <version>1.480.1</version>
+    <numExecutors>2</numExecutors>
+    <mode>NORMAL</mode>
+    <label>LESS_TERMCAP_mb=&#x1b;[01;31m</label>
+    <!-- Yeah, we deleted a lot of this ... fine for testing. -->
+</hudson>
\ No newline at end of file