PHP Unit - Example Unit Test

1. The tests for a class Class go into a class ClassTest.
   
2. ClassTest inherits (most of the time) from PHPUnit_Framework_TestCase.
   
3. The tests are public methods that are named test*.
   Alternatively, you can use the @test annotation in a method's docblock to mark it as a test method.
   
4. Inside the test methods, assertion methods such as assertEquals() (see the section called “Assertions”) are used to assert that an actual value matches an expected value.
   

class StackTest extends PHPUnit_Framework_TestCase
{
    public function testPushAndPop()
    {
        $stack = array();
        $this->assertEquals(0, count($stack));
 
        array_push($stack, 'foo');
        $this->assertEquals('foo', $stack[count($stack)-1]);
        $this->assertEquals(1, count($stack));
 
        $this->assertEquals('foo', array_pop($stack));
        $this->assertEquals(0, count($stack));
    }
}

Here's a List of the ASSERTIONS
Assertions
assertArrayHasKey()
assertClassHasAttribute()
assertClassHasStaticAttribute()
assertContains()
assertContainsOnly()
assertCount()
assertEmpty()
assertEqualXMLStructure()
assertEquals()
assertFalse()
assertFileEquals()
assertFileExists()
assertGreaterThan()
assertGreaterThanOrEqual()
assertInstanceOf()
assertInternalType()
assertLessThan()
assertLessThanOrEqual()
assertNull()
assertObjectHasAttribute()
assertRegExp()
assertStringMatchesFormat()
assertStringMatchesFormatFile()
assertSame()
assertSelectCount()
assertSelectEquals()
assertSelectRegExp()
assertStringEndsWith()
assertStringEqualsFile()
assertStringStartsWith()
assertTag()
assertThat()
assertTrue()
assertXmlFileEqualsXmlFile()
assertXmlStringEqualsXmlFile()
assertXmlStringEqualsXmlString()