432 lines
16 KiB
HTML
432 lines
16 KiB
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>SimpleTest for PHP regression test documentation</title>
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<link rel="stylesheet" type="text/css" href="docs.css" title="Styles">
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</head>
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<body>
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<div class="menu_back"><div class="menu">
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<a href="index.html">SimpleTest</a>
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<a href="overview.html">Overview</a>
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<span class="chosen">Unit tester</span>
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<a href="group_test_documentation.html">Group tests</a>
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<a href="mock_objects_documentation.html">Mock objects</a>
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<a href="partial_mocks_documentation.html">Partial mocks</a>
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<a href="reporter_documentation.html">Reporting</a>
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<a href="expectation_documentation.html">Expectations</a>
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<a href="web_tester_documentation.html">Web tester</a>
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<a href="form_testing_documentation.html">Testing forms</a>
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<a href="authentication_documentation.html">Authentication</a>
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<a href="browser_documentation.html">Scriptable browser</a>
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</div></div>
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<h1>PHP Unit Test documentation</h1>
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This page...
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<ul>
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<li>
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<a href="#unit">Unit test cases</a> and basic assertions.
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</li>
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<li>
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<a href="#extending_unit">Extending test cases</a> to
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customise them for your own project.
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</li>
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<li>
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<a href="#running_unit">Running a single case</a> as
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a single script.
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</li>
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</ul>
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<div class="content">
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<p><a class="target" name="unit"><h2>Unit test cases</h2></a></p>
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<p>
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The core system is a regression testing framework built around
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test cases.
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A sample test case looks like this...
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<pre>
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<strong>class FileTestCase extends UnitTestCase {
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}</strong>
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</pre>
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Actual tests are added as methods in the test case whose names
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by default start with the string "test" and
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when the test case is invoked all such methods are run in
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the order that PHP introspection finds them.
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As many test methods can be added as needed.
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</p>
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<p>
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For example...
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<pre>
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require_once('simpletest/autorun.php');
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require_once('../classes/writer.php');
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class FileTestCase extends UnitTestCase {
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function FileTestCase() {
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$this->UnitTestCase('File test');
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}<strong>
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function setUp() {
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@unlink('../temp/test.txt');
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}
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function tearDown() {
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@unlink('../temp/test.txt');
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}
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function testCreation() {
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$writer = &new FileWriter('../temp/test.txt');
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$writer->write('Hello');
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$this->assertTrue(file_exists('../temp/test.txt'), 'File created');
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}</strong>
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}
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</pre>
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The constructor is optional and usually omitted.
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Without a name, the class name is taken as the name of the test case.
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</p>
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<p>
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Our only test method at the moment is <span class="new_code">testCreation()</span>
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where we check that a file has been created by our
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<span class="new_code">Writer</span> object.
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We could have put the <span class="new_code">unlink()</span>
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code into this method as well, but by placing it in
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<span class="new_code">setUp()</span> and
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<span class="new_code">tearDown()</span> we can use it with
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other test methods that we add.
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</p>
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<p>
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The <span class="new_code">setUp()</span> method is run
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just before each and every test method.
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<span class="new_code">tearDown()</span> is run just after
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each and every test method.
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</p>
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<p>
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You can place some test case set up into the constructor to
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be run once for all the methods in the test case, but
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you risk test inteference that way.
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This way is slightly slower, but it is safer.
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Note that if you come from a JUnit background this will not
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be the behaviour you are used to.
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JUnit surprisingly reinstantiates the test case for each test
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method to prevent such interference.
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SimpleTest requires the end user to use <span class="new_code">setUp()</span>, but
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supplies additional hooks for library writers.
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</p>
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<p>
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The means of reporting test results (see below) are by a
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visiting display class
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that is notified by various <span class="new_code">assert...()</span>
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methods.
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Here is the full list for the <span class="new_code">UnitTestCase</span>
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class, the default for SimpleTest...
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<table><tbody>
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<tr>
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<td><span class="new_code">assertTrue($x)</span></td>
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<td>Fail if $x is false</td>
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</tr>
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<tr>
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<td><span class="new_code">assertFalse($x)</span></td>
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<td>Fail if $x is true</td>
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</tr>
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<tr>
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<td><span class="new_code">assertNull($x)</span></td>
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<td>Fail if $x is set</td>
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</tr>
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<tr>
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<td><span class="new_code">assertNotNull($x)</span></td>
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<td>Fail if $x not set</td>
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</tr>
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<tr>
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<td><span class="new_code">assertIsA($x, $t)</span></td>
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<td>Fail if $x is not the class or type $t</td>
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</tr>
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<tr>
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<td><span class="new_code">assertNotA($x, $t)</span></td>
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<td>Fail if $x is of the class or type $t</td>
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</tr>
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<tr>
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<td><span class="new_code">assertEqual($x, $y)</span></td>
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<td>Fail if $x == $y is false</td>
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</tr>
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<tr>
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<td><span class="new_code">assertNotEqual($x, $y)</span></td>
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<td>Fail if $x == $y is true</td>
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</tr>
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<tr>
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<td><span class="new_code">assertWithinMargin($x, $y, $m)</span></td>
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<td>Fail if abs($x - $y) < $m is false</td>
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</tr>
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<tr>
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<td><span class="new_code">assertOutsideMargin($x, $y, $m)</span></td>
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<td>Fail if abs($x - $y) < $m is true</td>
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</tr>
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<tr>
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<td><span class="new_code">assertIdentical($x, $y)</span></td>
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<td>Fail if $x == $y is false or a type mismatch</td>
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</tr>
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<tr>
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<td><span class="new_code">assertNotIdentical($x, $y)</span></td>
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<td>Fail if $x == $y is true and types match</td>
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</tr>
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<tr>
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<td><span class="new_code">assertReference($x, $y)</span></td>
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<td>Fail unless $x and $y are the same variable</td>
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</tr>
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<tr>
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<td><span class="new_code">assertClone($x, $y)</span></td>
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<td>Fail unless $x and $y are identical copies</td>
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</tr>
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<tr>
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<td><span class="new_code">assertPattern($p, $x)</span></td>
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<td>Fail unless the regex $p matches $x</td>
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</tr>
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<tr>
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<td><span class="new_code">assertNoPattern($p, $x)</span></td>
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<td>Fail if the regex $p matches $x</td>
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</tr>
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<tr>
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<td><span class="new_code">expectError($x)</span></td>
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<td>Swallows any upcoming matching error</td>
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</tr>
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<tr>
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<td><span class="new_code">assert($e)</span></td>
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<td>Fail on failed <a href="expectation_documentation.html">expectation</a> object $e</td>
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</tr>
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</tbody></table>
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All assertion methods can take an optional description as a
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last parameter.
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This is to label the displayed result with.
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If omitted a default message is sent instead, which is usually
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sufficient.
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This default message can still be embedded in your own message
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if you include "%s" within the string.
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All the assertions return true on a pass or false on failure.
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</p>
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<p>
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Some examples...
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<pre>
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$variable = null;
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<strong>$this->assertNull($variable, 'Should be cleared');</strong>
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</pre>
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...will pass and normally show no message.
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If you have
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<a href="http://www.lastcraft.com/display_subclass_tutorial.php">set up the tester to display passes</a>
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as well then the message will be displayed as is.
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<pre>
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<strong>$this->assertIdentical(0, false, 'Zero is not false [%s]');</strong>
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</pre>
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This will fail as it performs a type
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check, as well as a comparison, between the two values.
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The "%s" part is replaced by the default
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error message that would have been shown if we had not
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supplied our own.
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<pre>
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$a = 1;
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$b = $a;
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<strong>$this->assertReference($a, $b);</strong>
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</pre>
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Will fail as the variable <span class="new_code">$a</span> is a copy of <span class="new_code">$b</span>.
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<pre>
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<strong>$this->assertPattern('/hello/i', 'Hello world');</strong>
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</pre>
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This will pass as using a case insensitive match the string
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<span class="new_code">hello</span> is contained in <span class="new_code">Hello world</span>.
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<pre>
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<strong>$this->expectError();</strong>
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trigger_error('Catastrophe');
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</pre>
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Here the check catches the "Catastrophe"
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message without checking the text and passes.
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This removes the error from the queue.
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<pre>
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<strong>$this->expectError('Catastrophe');</strong>
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trigger_error('Catastrophe');
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</pre>
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The next error check tests not only the existence of the error,
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but also the text which, here matches so another pass.
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If any unchecked errors are left at the end of a test method then
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an exception will be reported in the test.
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</p>
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<p>
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Note that SimpleTest cannot catch compile time PHP errors.
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</p>
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<p>
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The test cases also have some convenience methods for debugging
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code or extending the suite...
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<table><tbody>
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<tr>
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<td><span class="new_code">setUp()</span></td>
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<td>Runs this before each test method</td>
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</tr>
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<tr>
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<td><span class="new_code">tearDown()</span></td>
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<td>Runs this after each test method</td>
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</tr>
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<tr>
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<td><span class="new_code">pass()</span></td>
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<td>Sends a test pass</td>
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</tr>
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<tr>
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<td><span class="new_code">fail()</span></td>
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<td>Sends a test failure</td>
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</tr>
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<tr>
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<td><span class="new_code">error()</span></td>
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<td>Sends an exception event</td>
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</tr>
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<tr>
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<td><span class="new_code">signal($type, $payload)</span></td>
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<td>Sends a user defined message to the test reporter</td>
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</tr>
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<tr>
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<td><span class="new_code">dump($var)</span></td>
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<td>Does a formatted <span class="new_code">print_r()</span> for quick and dirty debugging</td>
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</tr>
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</tbody></table>
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</p>
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<p><a class="target" name="extending_unit"><h2>Extending test cases</h2></a></p>
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<p>
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Of course additional test methods can be added to create
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specific types of test case, so as to extend framework...
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<pre>
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require_once('simpletest/autorun.php');
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<strong>
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class FileTester extends UnitTestCase {
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function FileTester($name = false) {
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$this->UnitTestCase($name);
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}
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function assertFileExists($filename, $message = '%s') {
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$this->assertTrue(
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file_exists($filename),
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sprintf($message, 'File [$filename] existence check'));
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}</strong>
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}
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</pre>
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|
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Here the SimpleTest library is held in a folder called
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<em>simpletest</em> that is local.
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Substitute your own path for this.
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</p>
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<p>
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To prevent this test case being run accidently, it is
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advisable to mark it as <span class="new_code">abstract</span>.
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</p>
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<p>
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Alternatively you could add a
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<span class="new_code">SimpleTestOptions::ignore('FileTester');</span>
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directive in your code.
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</p>
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<p>
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This new case can be now be inherited just like
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a normal test case...
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<pre>
|
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class FileTestCase extends <strong>FileTester</strong> {
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function setUp() {
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@unlink('../temp/test.txt');
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}
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function tearDown() {
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@unlink('../temp/test.txt');
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}
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function testCreation() {
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$writer = &new FileWriter('../temp/test.txt');
|
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$writer->write('Hello');<strong>
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$this->assertFileExists('../temp/test.txt');</strong>
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}
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}
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</pre>
|
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</p>
|
||
|
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<p>
|
||
|
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If you want a test case that does not have all of the
|
||
|
|
<span class="new_code">UnitTestCase</span> assertions,
|
||
|
|
only your own and a few basics,
|
||
|
|
you need to extend the <span class="new_code">SimpleTestCase</span>
|
||
|
|
class instead.
|
||
|
|
It is found in <em>simple_test.php</em> rather than
|
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|
|
<em>unit_tester.php</em>.
|
||
|
|
See <a href="group_test_documentation.html">later</a> if you
|
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|
|
want to incorporate other unit tester's
|
||
|
|
test cases in your test suites.
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<p><a class="target" name="running_unit"><h2>Running a single test case</h2></a></p>
|
||
|
|
<p>
|
||
|
|
You won't often run single test cases except when bashing
|
||
|
|
away at a module that is having difficulty, and you don't
|
||
|
|
want to upset the main test suite.
|
||
|
|
With <em>autorun</em> no particular scaffolding is needed,
|
||
|
|
just launch your particular test file and you're ready to go.
|
||
|
|
</p>
|
||
|
|
<p>
|
||
|
|
You can even decide which reporter (for example,
|
||
|
|
<span class="new_code">TextReporter</span> or <span class="new_code">HtmlReporter</span>)
|
||
|
|
you prefer for a specific file when launched on its own...
|
||
|
|
<pre>
|
||
|
|
<?php
|
||
|
|
require_once('simpletest/autorun.php');<strong>
|
||
|
|
SimpleTest :: prefer(new TextReporter());</strong>
|
||
|
|
require_once('../classes/writer.php');
|
||
|
|
|
||
|
|
class FileTestCase extends UnitTestCase {
|
||
|
|
...
|
||
|
|
}
|
||
|
|
?>
|
||
|
|
</pre>
|
||
|
|
This script will run as is, but of course will output zero passes
|
||
|
|
and zero failures until test methods are added.
|
||
|
|
</p>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
References and related information...
|
||
|
|
<ul>
|
||
|
|
<li>
|
||
|
|
SimpleTest project page on <a href="http://sourceforge.net/projects/simpletest/">SourceForge</a>.
|
||
|
|
</li>
|
||
|
|
<li>
|
||
|
|
SimpleTest download page on <a href="http://www.lastcraft.com/simple_test.php">LastCraft</a>.
|
||
|
|
</li>
|
||
|
|
<li>
|
||
|
|
<a href="http://simpletest.org/api/">Full API for SimpleTest</a>
|
||
|
|
from the PHPDoc.
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
<div class="menu_back"><div class="menu">
|
||
|
|
<a href="index.html">SimpleTest</a>
|
||
|
|
|
|
||
|
|
<a href="overview.html">Overview</a>
|
||
|
|
|
|
||
|
|
<span class="chosen">Unit tester</span>
|
||
|
|
|
|
||
|
|
<a href="group_test_documentation.html">Group tests</a>
|
||
|
|
|
|
||
|
|
<a href="mock_objects_documentation.html">Mock objects</a>
|
||
|
|
|
|
||
|
|
<a href="partial_mocks_documentation.html">Partial mocks</a>
|
||
|
|
|
|
||
|
|
<a href="reporter_documentation.html">Reporting</a>
|
||
|
|
|
|
||
|
|
<a href="expectation_documentation.html">Expectations</a>
|
||
|
|
|
|
||
|
|
<a href="web_tester_documentation.html">Web tester</a>
|
||
|
|
|
|
||
|
|
<a href="form_testing_documentation.html">Testing forms</a>
|
||
|
|
|
|
||
|
|
<a href="authentication_documentation.html">Authentication</a>
|
||
|
|
|
|
||
|
|
<a href="browser_documentation.html">Scriptable browser</a>
|
||
|
|
</div></div>
|
||
|
|
<div class="copyright">
|
||
|
|
Copyright<br>Marcus Baker 2006
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|