Fixes issue #395 - checks for aapt during build

CHANGES

@@ -6,6 +6,7 @@ v1.5.2 (TBA)
 -Moved build.gradle files to each sub-project, more organization :)
 -Fixed (issue #394) - Prevented duplicated files in final jar which saved around 1.2mb.
 -Added Proguard to drop final jar size from 6.2mb to 2.6mb.
+-Fixed (issue #395) - Added check for "aapt" in unit-tests.
 
 v1.5.1 PR3 (Released December 23 - 2012) Codename: Pre Release 3
 -Reverted "Prevents removal of <uses-sdk> on decompile, but then throws warning on rebuild (issue #366)"

brut.apktool/apktool-lib/src/test/java/brut/androlib/BuildAndDecodeTest.java

@@ -115,6 +115,11 @@ public class BuildAndDecodeTest {
     public void xmlReferencesTest() throws BrutException {
         compareXmlFiles("res/xml/references.xml");
     }
+    
+    @Test
+    public void aaptPresent() throws BrutException {
+    	checkIfAaptPresent();
+    }
 
     @Test
     public void qualifiersTest() throws BrutException {
@@ -122,6 +127,19 @@ public class BuildAndDecodeTest {
                 "-xlarge-long-land-desk-night-xhdpi-finger-keyssoft-12key" +
                 "-navhidden-dpad/strings.xml");
     }
+    
+    private void checkIfAaptPresent() throws BrutException {
+    	try
+    	{            
+    		Process proc = Runtime.getRuntime().exec("aapt");
+    		BufferedReader br = new BufferedReader(new InputStreamReader(proc.getErrorStream()));
+    		String line = null;
+    		while ( (line = br.readLine()) != null){}
+    	} catch (Exception ex){
+    		System.out.println("Please install 'aapt' to your path. See project website for more information.");
+    		throw new BrutException(ex);
+    	}
+    }
 
     private void compareValuesFiles(String path) throws BrutException {
         compareXmlFiles("res/" + path,