Writing Test Cases with PHPUnit
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Unit Test Cases Shouvik Chatterjee Senior Product Engineer, Kayako @tweetshouvik
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Writing Test Cases with PHPUnit
Transcript of Writing Test Cases with PHPUnit
Unit Test Cases
Shouvik Chatterjee
Senior Product Engineer, Kayako
@tweetshouvik
Is It Important?
Yes! Yes!
Yes!Yes!
Yes!
Yes! Yes!
Yes!Yes!
Yes!
Yes!Yes!
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Yes!
PHPUnit
What is PHPUnit?
PHPUnit by Sebastian Bergmann is an advanced unit testing framework for PHP.
Frequently used Methods
1. assertEquals()
2. assertInstanceOf()
3. setUp() & tearDown()
4. setUpBeforeClass() & tearDownAfterClass()
5. @dataProvider
6. @expectedException & @expectedExceptionMessage
assertEquals()
assertEquals(mixed $expected, mixed $actual[, string $message = ''])
Reports an error identified by $message if the two variables $expected and $actual are not equal.
assertInstanceOf()
assertInstanceOf($expected, $actual[, $message = ''])
Reports an error identified by $message if $actual is not an instance of $expected.
setUp() & tearDown()
setUp() method is called before every test case, which means that this method can be called few times per one test class.
Similarly, tearDown() method is called after every test case.
setUpBeforeClass() & tearDownAfterClass()
setUpBeforeClass() method is executed only once per class, and even before object is constructed, and that is the reason why it is marked as static public function.
Similarly, tearDownAfterClass() method is called after all tests in class finish, and after last tearDown() method is called.
@dataProvider()
A test method can accept arbitrary arguments. These
arguments are to be provided by a data provider method.
The data provider method to be used is specified using the
@dataProvider annotation.
@expectedException & @expectedExceptionMessage
The @expectedException annotation is used to test
whether an exception is thrown inside the tested code.
The @expectedExceptionMessage annotation lets you
make an assertion on the error message of an exception.
Rules of Thumb
Don’t write test cases for
the sake of writing.
Be descriptive when writing test cases.
public function testCreateReturnsTrue() { … }
public function testCaseOne() { … }
Make use of the PHPUnit’s built-in methods.
$this->assertTrue($isValidStatus);
$this->assertEquals(true, $isValidStatus);
Try splitting up your test cases as much as possible for the sake of
readability.// Case 1 public function testCreateException() { … }
// Case 2public function testCreateSuccess() { … }
// Case3public function testCreateReturnsFalse() { … }
Try to keep your test cases
independent.
Questions?
Thank You
