UNIT TESTING with PHPUnit

about me @ferca_tw

ferran caellas puig

Core Developer at eyeOS Computer geek and Open Source enthusiast

UNIT TESTING What is

class CoreTest extends PHPUnit_framework_TestCase {

public function TestCount() { $testArray = array(‘value1’,’value2’,’value3’); $countResult = count($testArray); $this->assertEquals(3, $countResult); }

}

What you want is to write tests that fail even though you think they should work, or tests that succeed even though you think they should fail. You want to write tests that will pay you back with information.

Erich Gamma

During development Writing tests

TEST-DRIVEN DEVELOPMENT TDD

During debugging Writing tests

1. Verify that you can reproduce the bug. 2. Find the smallest-scale demonstration of the bug in the code. 3. Write an automated test that fails now but will succeed when the bug is fixed. 4. Fix the bug.

STEPS

CODE

COVE

RAGE

The beauty of testing is found not in the effort but in the effiency. Knowing what should be tested is beautiful, and knowing what is being tested is beautiful.

Murali Nandigama

@de

pend

s public function testEmpty() { $stack = array(); $this->assertEmpty($stack); return $stack; } /** * @depends testEmpty */ public function testPush(array $stack) { array_push($stack, 'foo'); $this->assertEquals('foo', $stack[count($stack)-1]); $this->assertNotEmpty($stack); return $stack; }

@da

taPr

ovide

r /** * @dataProvider provider */ public function testAdd($a, $b, $c) { $this->assertEquals($c, $a + $b); } public function provider() { return array( array(0, 0, 0), array(0, 1, 1), array(1, 0, 1), array(1, 1, 3) ); }

@ex

pect

edEx

cept

ion

/** * @expectedException InvalidArgumentException * @expectedExceptionMessage Right Message */ public function testExceptionHasRightMessage() { throw new InvalidArgumentException('Some Message', 10); } /** * @expectedException InvalidArgumentException * @expectedExceptionCode 20 */ public function testExceptionHasRightCode() { throw new InvalidArgumentException('Some Message', 10); }

expe

ctOu

tput

Strin

g public function testExpectFooActualFoo() { $this->expectOutputString('foo'); print 'foo'; }

Asse

rtion

s assertArrayHasKey()  assertClassHasA/ribute()  assertClassHasSta4cA/ribute()  assertContains()  assertContainsOnly()  assertCount()  assertEmpty()  assertEqualXMLStructure()  assertEquals()  assertFalse()  assertFileEquals()  assertFileExists()  assertGreaterThan()  assertGreaterThanOrEqual()  assertInstanceOf()  assertInternalType()  assertLessThan()  assertLessThanOrEqual()  assertNull()  

assertObjectHasA/ribute()  assertRegExp()  assertStringMatchesFormat()  assertStringMatchesFormatFile()  assertSame()  assertSelectCount()  assertSelectEquals()  assertSelectRegExp()  assertStringEndsWith()  assertStringEqualsFile()  assertStringStartsWith()  assertTag()  assertThat()  assertTrue()  assertXmlFileEqualsXmlFile()  assertXmlStringEqualsXmlFile()  assertXmlStringEqualsXmlString()  

Fixtu

res

setUp() tearDown()

setUpBeforeClass() tearDownAfterClass()

protected function setUp() { $this->stack = array(); } public function testEmpty() { $this->assertTrue(empty($this->stack)); } public function testPush() { array_push($this->stack, 'foo'); $this->assertEquals('foo', $this->stack[count($this->stack)-1]); $this->assertFalse(empty($this->stack)); }

Incom

plete

& Sk

ipped

markTestIncomplete() markTestSkipped()

$this->markTestIncomplete( 'This test has not been implemented yet.' );

phpunit  -­‐-­‐verbose  SampleTest  PHPUnit  3.6.0  by  Sebas4an  Bergmann.  I  Time:  0  seconds,  Memory:  3.75Mb    There  was  1  incomplete  test:    1)  SampleTest::testSomething  This  test  has  not  been  implemented  yet.    /home/sb/SampleTest.php:12  OK,  but  incomplete  or  skipped  tests!  Tests:  1,  Asser4ons:  1,  Incomplete:  1.  

UNIT TESTING with PHPUnit