Add test jar generation logic for ant builds.

build/android/ant/create-test-jar.js

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * Combines classes from javac.custom.classpath property and ${out.dir}/classes
+ * into a single jar file ${ant.project.name}-debug.jar and places the file in
+ * ${lib.java.dir}.
+ */
+
+importClass(java.io.File);
+importClass(org.apache.tools.ant.types.Reference);
+importClass(org.apache.tools.ant.types.FileSet);
+importClass(org.apache.tools.ant.types.ZipFileSet);
+importClass(org.apache.tools.ant.taskdefs.Zip);
+
+var echo = project.createTask("echo");
+var jarTask = project.createTask("jar");
+
+// Do not allow duplicates in the jar, the default behavior of Jar task
+// is "add" which means duplicates are allowed.
+// This can cause a class file to be included multiple times, setting the
+// duplicate to "preserve" ensures that only the first definition is included.
+
+var duplicate = Zip.Duplicate();
+duplicate.setValue("preserve");
+jarTask.setDuplicate(duplicate);
+
+var destFile = project.getProperty("ant.project.name") + "-debug.jar";
+var destPath = File(project.getProperty("test.lib.java.dir") + "/" + destFile);
+jarTask.setDestFile(destPath);
+
+// Include all the jars in the classpath.
+var javacCustomClasspath =
+    project.getReference("javac.custom.classpath").list();
+
+for (var i in javacCustomClasspath) {
+  var zipFileSet = ZipFileSet();
+  zipFileSet.setIncludes("**/*.class");
+  zipFileSet.setSrc(File(javacCustomClasspath[i]));
+  jarTask.addFileset(zipFileSet);
+}
+
+// Add the compiled classes in ${out.dir}/classes.
+var projectClasses = FileSet();
+projectClasses.setIncludes("**/*.class");
+projectClasses.setDir(File(project.getProperty("out.dir") + "/classes"));
+jarTask.addFileset(projectClasses);
+
+// Exclude manifest and resource classes.
+var appPackagePath =
+    (project.getProperty("project.app.package")).replace('.','/');
+var excludedClasses = ["R.class", "R$*.class", "Manifest.class",
+    "Manifest$*.class", "BuildConfig.class"]
+
+var exclusionString = "";
+for (var i in excludedClasses) {
+  exclusionString += appPackagePath+ "/" + excludedClasses[i] + " ";
+}
+
+jarTask.setExcludes(exclusionString);
+echo.setMessage("Creating test jar: " +
+                jarTask.getDestFile().getAbsolutePath());
+jarTask.perform();