refs #membrane#277 Parse the version attribute and generate diff..

Includes tests for parsing attribute version and diff.

core/src/test/groovy/com/predic8/schema/SchemaVersionTest.groovy

@@ -0,0 +1,18 @@
+package com.predic8.schema;
+
+import com.predic8.xml.util.ClasspathResolver;
+
+public class SchemaVersionTest extends GroovyTestCase {
+    def schema
+
+    void setUp() {
+        def parser = new SchemaParser(resourceResolver: new ClasspathResolver())
+        schema = parser.parse("/schema/version/schema-version.xsd")
+    }
+
+    void testSchemaVersion() {
+        def expected = "1.0"
+        def version = schema.version
+        assertEquals( expected, version )
+    }
+}

core/src/test/resources/schema/version/schema-version.xsd

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
+  targetNamespace="http://predic8.com/human-resources/" xmlns:tns="http://predic8.com/human-resources/"
+  elementFormDefault="unqualified" xmlns:ct="http://predic8.com/common-types/"
+  version="1.0"
+>
+
+  <xsd:group name="PersonGroup">
+    <xsd:all>
+      <xsd:element name="firstName" type="xsd:string" />
+      <xsd:element name="lastName" type="xsd:string" />
+      <xsd:element name="isHuman" />
+    </xsd:all>
+  </xsd:group>
+
+  <xsd:complexType name="EmployeeType">
+    <xsd:all minOccurs="1">
+      <xsd:element name="person">
+        <xsd:complexType>
+          <xsd:group ref="tns:PersonGroup" />
+        </xsd:complexType>
+      </xsd:element>
+      <xsd:element name="city" type="xsd:string" />
+    </xsd:all>
+  </xsd:complexType>
+
+  <xsd:element name="employee" type="tns:EmployeeType" />
+
+</xsd:schema>