What is the difference between Gnome Compiz Flashback and Gnome Metacity Flashback?

Question

Using JUnit 4.12 and AndroidStudio I am trying to test below method Where results seems to be matching I don't know why as a reesult I am getting java.lang.AssertionError

Method under test:

public String dateNow() {
    SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy_hh-mm-ss");
    String date = sdf.format(new Date());
    return date;
}

My test class :

private Addons mAddons;

@Before
public void setUp() throws Exception{
    mAddons = new Addons();
}

@Test
public void testDateNow() throws Exception {

    final String reality = mAddons.dateNow().substring(0,10);
    final String expected = "09-08-2017";
    assertSame("testDateNow() :", expected, reality);
}

console output:

java.lang.AssertionError: testDateNow() : expected same:<09-08-2017> was not:<09-08-2017>

Expected :09-08-2017
Actual   :09-08-2017

I don't know why it is failing. Anyone would bee so king to point me into right direction please?

Solution 1

The backend is different: Compiz uses a 3D compositor to display the windows. Whereas Metacity displays the windows in 2D. So if you have a low end graphics card and/or want to save energy on a mobile device I would suggest that you use metacity.

There also used to be problems with 3D applications in combination with compiz.

Solution 2

In my experience falling back to gnome after installing Trusty, these answers are not fully adequate. I found the Metacity option preferable to the compiz for two reasons right out of the box. Metacity comes set up with four workspaces, while this has to be configured in compiz and I found the configuration not straightforward as apparently there are two competing window managers. Further Metacity will consistently put the menus on the panel where I expect them whereas the compiz version did not always do this.

Comments

[Egl]

off-topic: The fixed String should be the expected, and the resultant String should be the real.

[Msmkt]

@Egl - that is very true. Thanks for pointing it out. Thats my first test class ever.

[Ajay Barot]

i attach image.graphics problem occurs on mouse curser when i type something. and please can i get more info of about these.

[Ajay Barot]

these two option only appears in user login. so how enable or open default ubuntu.

[rupesh-mdr]

Probably a bug. I would suggest that you use the metacity compositor.

[Ajay Barot]

Yes I know what UI differences exist between compiz and metacity. Still thanks for sharing your experience :)

[Msmkt]

thank you for your explanation, I realised it when @Egl posted his answer.