Difference between assertEquals and assertSame in PHPUnit?

Question

PHPUnit contains an assertEquals() method, but it also has an assertSame() one. At first glance it looks like they do the same thing.

What is the difference between the t

Answer 1

As previously mentioned, assertEquals() is primarily about an interpreted value, be it by type juggling or an object with an __magic presentation method (__toString() for example).

A good use case for assertSame() is testing a singleton factory.

class CacheFactoryTest extends TestCase
{
    public function testThatCacheFactoryReturnsSingletons()
    {
        $this->assertSame(CacheFactory::create(), CacheFactory::create());
    }
}