For more information read: http://android-developers.blogspot.com/2009/06/introducing-android-15-ndk-release-1.html

Gerrit documentation

Clone master branch:
git clone ssh://user@review-server:29418/myProject

Send new patch:
git push ssh://user@review-server:29418/myProject HEAD:refs/for/master

update a patch:
1: Grab a change:
   git pull ssh://user@review-server:29418/myProject refs/changes/<nbr>
2: Make you changes.
   # commit A
3: Rebase
   git rebase -i HEAD~2
   change pick to squash
4: Push

If you see any problem or has any comments send my a note.

http://gregmeiste.com/2009/02/mirror-android-repositories-on-a-local-server/

It seems to work very good and has a clean and simple UI.
It supports categories and adding images.
But its missing feature for adding tags but its looks like that will be included in next release.

You can find it on http://nickthecook.wordpress.com/

One tool for doing this is JUnit. JUnit is for Java but it exist similar tools for other languages.

We will start with a simple example, we will write a unit test for Java LinkedList.

import java.util.LinkedList;

import junit.framework.Assert;
import junit.framework.TestCase;

import org.junit.After;
import org.junit.Before;

public class testLinkedList extends TestCase {

    private LinkedList<String> list = null;

    @Before
    public void setUp() throws Exception {
        list = new LinkedList<String>();
    }

    @After
    public void tearDown() throws Exception {
        list = null;
    }

    public void testNewLinkedList() {
        Assert.assertNotNull(list);
    }

    public void testSizeZero() {
        Assert.assertEquals(0, list.size());
    }

    public void testSizeOneString() {
        String testString = "Hello world, this is our test string.";
        list.add(testString);
        Assert.assertEquals(1, list.size());
    }

    public void testIsEmpty() {
        Assert.assertTrue(list.isEmpty());
    }

    public void testIsEmptyOneString() {
        String testString = "Hello world, this is our test string.";
        list.add(testString);
        Assert.assertFalse(list.isEmpty());
    }
}

This test will work on Java implementation of LinkedList.
With this test we should try to make our own implementation of a list.

Lets create a new class called MyList with our 3 methods that we are testing.

public class MyList {

	public void add(String testString) {
	}

	public boolean isEmpty() {
		return false;
	}

	public int size() {
		return 0;
	}

}

If we change all references LinkedList to MyList in our testcase and try to run it again we will get a new result with 3 tests passed and 2 tests failed.

	private MyList list = null;

	@Before
	public void setUp() throws Exception {
		list = new MyList();
	}

As you can see the tests that’s failing is testSizeOneString and testIsEmpty.

So lets try fix some of the problem.
If we implement MyList with a array of Strings like this all tests will pass.

public class MyList {

	String[] array = null;
	int pos = -1;

	public MyList() {
		array = new String[20];
		pos = 0;
	}

	public void add(String testString) {
		array[pos++] = testString;
	}

	public boolean isEmpty() {
		return (pos == 0);
	}

	public int size() {
		return pos;
	}

}

The problem with this implementation is that it will not be possible to add more then 20 items to the list. So by adding next test we need to find a new way to implement the list.

	public void testSize30Strings() {
		String testString = "Hello world, this is our test string.";
		for (int i = 0; i < 30; i++) {
			list.add(testString);
		}
		Assert.assertEquals(30, list.size());
	}

This was my quick tour of java junit. If you liked it or hated it please leave a comment and I will try to change it.

Have fun and don’t forget to test your code…