JAL-1888 documentation for testing target

diff --git a/build.xml b/build.xml
index da389fe..29e151b 100755 (executable)
--- a/build.xml
+++ b/build.xml
@@ -19,7 +19,7 @@
 -->
 <project name="jalviewX" default="usage" basedir=".">
   <target name="help" depends="usage" />
-  <target name="usage">
+  <target name="usage" depends="init">
     <echo message="~~~Jalview Ant build.xml Usage~~~~" />
     <echo message="Targets include:" />
     <echo message="usage - default target, displays this message" />
@@ -30,6 +30,8 @@
     <echo message="              this needs a keystore and key. See docs/building.html for more information." />
     <echo message="compileApplet - compiles all necessary files for Applet" />
     <echo message="makeApplet - compiles, then packages and obfuscates the Applet" />
+    <echo message="testng - run jalview's tests via testNG. Default group is '${testng-groups}'" />
+    <echo message="      you can specify particular test groups as a list via -Dtestng-groups=" />
     <echo message="See docs/building.html and the comments in build file for other targets." />
     <echo message="note: compile and makeApplet require the property java118.home to be set to point to a java 1.1.8 jdk." />
     <echo message="Useful -D flags: -Ddonotobfuscate will prevent applet obfuscation" />