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delete, select & insert upgraded More utility function (node to array, arrayToNode) XMLDB special move command PHP Unit Test
387 lines
15 KiB
HTML
387 lines
15 KiB
HTML
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>SimpleTest for PHP test suites</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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<a href="index.html">SimpleTest</a>
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<a href="overview.html">Overview</a>
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<a href="unit_test_documentation.html">Unit tester</a>
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<span class="chosen">Group tests</span>
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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>Test suite documentation</h1>
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This page...
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<ul>
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<li>
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Different ways to <a href="#group">group tests</a> together.
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</li>
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<li>
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Combining group tests into <a href="#higher">larger groups</a>.
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</li>
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<li>
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Integrating <a href="#legacy">legacy test cases</a> from other
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types of PHPUnit.
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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="group"><h2>Grouping tests into suites</h2></a></p>
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<p>
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To run test cases as part of a group, the test cases should really
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be placed in files without the runner code...
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<pre>
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<strong><?php
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require_once('../classes/io.php');
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class FileTester extends UnitTestCase {
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...
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}
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class SocketTester extends UnitTestCase {
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...
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}
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?></strong>
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</pre>
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As many cases as needed can appear in a single file.
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They should include any code they need, such as the library
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being tested, but none of the simple test libraries.
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</p>
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<p>
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If you have extended any test cases, you can include them
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as well. In PHP 4...
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<pre>
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<?php
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require_once('../classes/io.php');
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<strong>
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class MyFileTestCase extends UnitTestCase {
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...
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}
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SimpleTest::ignore('MyFileTestCase');</strong>
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class FileTester extends MyFileTestCase { ... }
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class SocketTester extends UnitTestCase { ... }
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?>
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</pre>
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The <span class="new_code">FileTester</span> class does
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not contain any actual tests, but is a base class for other
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test cases.
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For this reason we use the
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<span class="new_code">SimpleTestOptions::ignore()</span> directive
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to tell the upcoming group test to ignore it.
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This directive can appear anywhere in the file and works
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when a whole file of test cases is loaded (see below).
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</p>
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<p>
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If you are using PHP 5, you do not need this special directive at all.
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Simply mark any test cases that should not be run as abstract...
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<pre>
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<strong>abstract</strong> class MyFileTestCase extends UnitTestCase {
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...
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}
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class FileTester extends MyFileTestCase { ... }
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class SocketTester extends UnitTestCase { ... }
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</pre>
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</p>
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<p>
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We will call this sample <em>file_test.php</em>.
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Next we create a group test file, called say <em>my_group_test.php</em>.
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You will think of a better name I am sure.
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</p>
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<p>
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We will add the test file using a safe method...
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<pre>
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<?php
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require_once('simpletest/unit_tester.php');
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require_once('simpletest/reporter.php');<strong>
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require_once('file_test.php');
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$test = &new TestSuite('All file tests');
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$test->addTestCase(new FileTestCase());
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$test->run(new HtmlReporter());</strong>
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?>
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</pre>
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This instantiates the test case before the test suite is
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run.
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This could get a little expensive with a large number of test
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cases, and can be surprising behaviour.
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</p>
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<p>
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The main problem is that for every test case
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that we add we will have
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to <span class="new_code">require_once()</span> the test code
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file and manually instantiate each and every test case.
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</p>
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<p>
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We can save a lot of typing with...
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<pre>
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<?php
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require_once('simpletest/unit_tester.php');
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require_once('simpletest/reporter.php');
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$test = &new TestSuite('All file tests');<strong>
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$test->addTestFile('file_test.php');</strong>
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$test->run(new HtmlReporter());
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?&gt;
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</pre>
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What happens here is that the <span class="new_code">TestSuite</span>
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class has done the <span class="new_code">require_once()</span>
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for us.
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It then checks to see if any new test case classes
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have been created by the new file and automatically adds
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them to the group test.
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Now all we have to do is add each new file.
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</p>
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<p>
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No only that, but you can guarantee that the constructor is run
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just before the first test method and, in PHP 5, the destructor
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is run just after the last test method.
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</p>
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<p>
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There are two things that could go wrong and which require care...
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<ol>
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<li>
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The file could already have been parsed by PHP, and so no
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new classes will have been added. You should make
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sure that the test cases are only included in this file
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and no others (Note : with the new <cite>autorun</cite>
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functionnality, this problem has now been solved).
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</li>
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<li>
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New test case extension classes that get included will be
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placed in the group test and run also.
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You will need to add a <span class="new_code">SimpleTestOptions::ignore()</span>
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directive for these classes, or make sure that they are included
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before the <span class="new_code">TestSuite::addTestFile()</span>
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line, or make sure that they are abstract classes.
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</li>
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</ol>
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</p>
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<p><a class="target" name="higher"><h2>Composite suites</h2></a></p>
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<p>
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The above method places all of the test cases into one large group.
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For larger projects though this may not be flexible enough; you
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may want to group the tests in all sorts of ways.
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</p>
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<p>
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To get a more flexible group test we can subclass
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<span class="new_code">TestSuite</span> and then instantiate it as needed...
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<pre>
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<?php
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require_once('simpletest/unit_tester.php');
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require_once('simpletest/reporter.php');
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<strong>
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class FileTestSuite extends TestSuite {
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function FileTestSuite() {
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$this->TestSuite('All file tests');
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$this->addTestFile('file_test.php');
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}
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}</strong>
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?>
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</pre>
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This effectively names the test in the constructor and then
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adds our test cases and a single group below.
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Of course we can add more than one group at this point.
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We can now invoke the tests from a separate runner file...
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<pre>
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<?php
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require_once('file_test_suite.php');
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<strong>
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$test = &new FileTestSuite();
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$test->run(new HtmlReporter());</strong>
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?>
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</pre>
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...or we can group them into even larger group tests.
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We can even mix groups and test cases freely as long as
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we are careful about double includes...
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<pre>
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<?php
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<strong>
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$test = &new BigTestSuite('Big group');
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$test->addTestFile('file_test_suite.php');
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$test->addTestFile('some_test_case.php');</strong>
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$test->run(new HtmlReporter());
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?>
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</pre>
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In the event of a double include, ony the first instance
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of the test case will be run.
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</p>
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<p>
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If we still wish to run the original group test, and we
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don't want all of these little runner files, we can
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put the test runner code around guard bars when we create
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each group.
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<pre>
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<?php
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class FileTestSuite extends TestSuite {
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function FileTestSuite() {
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$this->TestSuite('All file tests');
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$test->addTestFile('file_test.php');
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}
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}
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<strong>
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if (! defined('RUNNER')) {
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define('RUNNER', true);</strong>
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$test = &new FileTestSuite();
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$test->run(new HtmlReporter());
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}
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?>
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</pre>
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This approach requires the guard to be set when including
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the group test file, but this is still less hassle than
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lots of separate runner files.
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You include the same guard on the top level tests to make sure
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that <span class="new_code">run()</span> will run once only
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from the top level script that has been invoked.
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<pre>
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<?php<strong>
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define('RUNNER', true);</strong>
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require_once('file_test_suite.php');
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$test = &new BigTestSuite('Big group');
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$test->addTestCase(new FileTestSuite());
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$test->addTestCase(...);
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$test->run(new HtmlReporter());
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?>
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</pre>
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As with the normal test cases, a <span class="new_code">TestSuite</span> can
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be loaded with the <span class="new_code">TestSuite::addTestFile()</span> method.
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<pre>
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<?php
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define('RUNNER', true);
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$test = &new BigTestSuite('Big group');<strong>
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$test->addTestFile('file_test_suite.php');
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$test->addTestFile(...);</strong>
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$test->run(new HtmlReporter());
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?>
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</pre>
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</p>
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<p><a class="target" name="legacy"><h2>Integrating legacy test cases</h2></a></p>
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<p>
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If you already have unit tests for your code or are extending external
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classes that have tests, it is unlikely that all of the test cases
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are in SimpleTest format.
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Fortunately it is possible to incorporate test cases from other
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unit testers directly into SimpleTest group tests.
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</p>
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<p>
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Say we have the following
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<a href="http://sourceforge.net/projects/phpunit">PhpUnit</a>
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test case in the file <em>config_test.php</em>...
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<pre>
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<strong>class ConfigFileTest extends TestCase {
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function ConfigFileTest() {
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$this->TestCase('Config file test');
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}
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function testContents() {
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$config = new ConfigFile('test.conf');
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$this->assertRegexp('/me/', $config->getValue('username'));
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}
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}</strong>
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</pre>
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The group test can recognise this as long as we include
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the appropriate adapter class before we add the test
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file...
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<pre>
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<?php
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require_once('simpletest/unit_tester.php');
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require_once('simpletest/reporter.php');<strong>
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require_once('simpletest/adapters/phpunit_test_case.php');</strong>
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$test = &new TestSuite('All file tests');<strong>
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$test->addTestFile('config_test.php');</strong>
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$test->run(new HtmlReporter());
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?>
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</pre>
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There are only two adapters, the other is for the
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<a href="http://pear.php.net/manual/en/package.php.phpunit.php">PEAR</a>
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1.0 unit tester...
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<pre>
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<?php
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require_once('simpletest/unit_tester.php');
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require_once('simpletest/reporter.php');<strong>
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require_once('simpletest/adapters/pear_test_case.php');</strong>
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$test = &new TestSuite('All file tests');<strong>
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$test->addTestFile('some_pear_test_cases.php');</strong>
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$test->run(new HtmlReporter());
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?>
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</pre>
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The PEAR test cases can be freely mixed with SimpleTest
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ones even in the same test file,
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but you cannot use SimpleTest assertions in the legacy
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test case versions.
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This is done as a check that you are not accidently making
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your test cases completely dependent on SimpleTest.
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You may want to do a PEAR release of your library for example,
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which would mean shipping it with valid PEAR::PhpUnit test
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cases.
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</p>
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</div>
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References and related information...
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<ul>
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<li>
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SimpleTest project page on <a href="http://sourceforge.net/projects/simpletest/">SourceForge</a>.
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</li>
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<li>
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SimpleTest download page on <a href="http://www.lastcraft.com/simple_test.php">LastCraft</a>.
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</li>
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</ul>
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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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<a href="unit_test_documentation.html">Unit tester</a>
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|
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<span class="chosen">Group tests</span>
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<a href="mock_objects_documentation.html">Mock objects</a>
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|
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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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<div class="copyright">
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Copyright<br>Marcus Baker 2006
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</div>
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</body>
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</html>
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