Updated build.xml to fail descriptively if LiveConnect of JUnit is no…

…t found, updated BUILD to say JUnit 3, not "4 or greater", since we curently use JUnit 3 API

git-svn-id: https://svn.apache.org/repos/asf/incubator/pivot/trunk@764922 13f79535-47bb-0310-9956-ffa450edef68

BUILD

@@ -4,7 +4,7 @@ System Requirements
 
 * JDK 1.6 or greater (http://java.sun.com/)
 * Ant 1.7 or greater (http://ant.apache.org/)
-* JUnit 4 or greater (http://www.junit.org/)
+* JUnit 3 (http://www.junit.org/)
 
 
 Building Pivot

build.xml

@@ -213,6 +213,14 @@ limitations under the License.
 
     <!-- Core Test -->
     <target name="core-test" depends="core">
+        <fail message="JUnit not found. Please see the BUILD file for more information.">
+            <condition>
+                <not>
+                    <available classname="junit.framework.TestCase"/>
+                </not>
+            </condition>
+        </fail>
+
         <mkdir dir="core/${folder.bin}"/>
         <javac srcdir="core/test"
             destDir="core/${folder.bin}"
@@ -354,6 +362,14 @@ limitations under the License.
 
     <!-- WTK -->
     <target name="wtk" depends="core">
+        <fail message="LiveConnect not found. Please see the BUILD file for more information.">
+            <condition>
+                <not>
+                    <available classname="netscape.javascript.JSObject"/>
+                </not>
+            </condition>
+        </fail>
+
         <mkdir dir="wtk/${folder.bin}"/>
         <javac srcdir="wtk/src"
             destDir="wtk/${folder.bin}"