Add httpsession-xml

Fixes #103

samples/httpsession-xml/src/integration-test/groovy/sample/AttributeTests.groovy

@@ -0,0 +1,30 @@
+package sample
+
+import geb.spock.*
+import sample.pages.HomePage;
+import spock.lang.Stepwise
+import pages.*
+
+/**
+ * Tests the CAS sample application using service tickets.
+ *
+ * @author Rob Winch
+ */
+@Stepwise
+class AttributeTests extends GebReportingSpec {
+    def 'first visit no attributes'() {
+        when:
+        to HomePage
+        then:
+        attributes.empty
+    }
+
+    def 'create attribute'() {
+        when:
+        createAttribute('a','b')
+        then:
+        attributes.size() == 1
+        attributes[0].name == 'a'
+        attributes[0].value == 'b'
+    }
+}