Added new <code>assert:assertFileContains</code> tag that verifies if a file contains a specific string.

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@156960 13f79535-47bb-0310-9956-ffa450edef68

plugin/plugin.jelly

@@ -27,7 +27,8 @@
   xmlns:maven="jelly:maven"
   xmlns:plugin="plugin"
   xmlns:u="jelly:util"
-  xmlns:x="jelly:xml">
+  xmlns:x="jelly:xml"
+  xmlns:assert="assert">
   
   <j:if test="${bootstrapping == null}">
     <!-- Poor mans version check - plugin dependencies still suck for multiple versions -->
@@ -379,6 +380,16 @@
         <ant:fail>${file} does not exist.${msg}</ant:fail>
       </j:if>      
     </define:tag>
+    <define:tag name="assertFileContains">
+      <!-- @file : Full file path -->
+      <!-- @match: the matching value expected  -->
+      <!-- @msg  : optional message to be displayed -->
+      <assert:assertFileExists file="${file}" msg="${msg}"/>
+      <u:loadText var="fileContent" file="${file}"/>
+      <j:if test="${fileContent.indexOf(match) lt 0}">
+        <ant:fail>${file} does not contain string [${match}].${msg}</ant:fail>
+      </j:if>
+    </define:tag>
     <define:tag name="assertFileNotFound">
       <!-- @file : Full file path -->
       <!-- @msg  : optional message to be displayed -->