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-<html>
-<head>
-<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
-<title>Simple Test for PHP web script testing documentation</title>
-<link rel="stylesheet" type="text/css" href="docs.css" title="Styles">
-</head>
-<body>
-<div class="menu_back">
-<div class="menu">
-<h2>
-<a href="index.html">SimpleTest</a>
-</h2>
-<ul>
-<li>
-<a href="overview.html">Overview</a>
-</li>
-<li>
-<a href="unit_test_documentation.html">Unit tester</a>
-</li>
-<li>
-<a href="group_test_documentation.html">Group tests</a>
-</li>
-<li>
-<a href="server_stubs_documentation.html">Server stubs</a>
-</li>
-<li>
-<a href="mock_objects_documentation.html">Mock objects</a>
-</li>
-<li>
-<a href="partial_mocks_documentation.html">Partial mocks</a>
-</li>
-<li>
-<a href="reporter_documentation.html">Reporting</a>
-</li>
-<li>
-<a href="expectation_documentation.html">Expectations</a>
-</li>
-<li>
-<span class="chosen">Web tester</span>
-</li>
-<li>
-<a href="form_testing_documentation.html">Testing forms</a>
-</li>
-<li>
-<a href="authentication_documentation.html">Authentication</a>
-</li>
-<li>
-<a href="browser_documentation.html">Scriptable browser</a>
-</li>
-</ul>
-</div>
-</div>
-<h1>Web tester documentation</h1>
-<div class="content">
- <p>
-<a class="target" name="fetch">
-<h2>Fetching a page</h2>
-</a>
-</p>
- <p>
- Testing classes is all very well, but PHP is predominately
- a language for creating functionality within web pages.
- How do we test the front end presentation role of our PHP
- applications?
- Well the web pages are just text, so we should be able to
- examine them just like any other test data.
- </p>
- <p>
- This leads to a tricky issue.
- If we test at too low a level, testing for matching tags
- in the page with pattern matching for example, our tests will
- be brittle.
- The slightest change in layout could break a large number of
- tests.
- If we test at too high a level, say using mock versions of a
- template engine, then we lose the ability to automate some classes
- of test.
- For example, the interaction of forms and navigation will
- have to be tested manually.
- These types of test are extremely repetitive and error prone.
- </p>
- <p>
- SimpleTest includes a special form of test case for the testing
- of web page actions.
- The <span class="new_code">WebTestCase</span> includes facilities
- for navigation, content and cookie checks and form handling.
- Usage of these test cases is similar to the
- <a href="unit_tester_documentation.html">UnitTestCase</a>...
-<pre>
-<strong>class TestOfLastcraft extends WebTestCase {
-}</strong>
-</pre>
- Here we are about to test the
- <a href="http://www/lastcraft.com/">Last Craft</a> site itself.
- If this test case is in a file called <em>lastcraft_test.php</em>
- then it can be loaded in a runner script just like unit tests...
-<pre>
-&lt;?php<strong>
- require_once('simpletest/web_tester.php');</strong>
- require_once('simpletest/reporter.php');
-
- $test = &amp;new GroupTest('Web site tests');<strong>
- $test-&gt;addTestFile('lastcraft_test.php');</strong>
- exit ($test-&gt;run(new TextReporter()) ? 0 : 1);
-?&gt;
-</pre>
- I am using the text reporter here to more clearly
- distinguish the web content from the test output.
- </p>
- <p>
- Nothing is being tested yet.
- We can fetch the home page by using the
- <span class="new_code">get()</span> method...
-<pre>
-class TestOfLastcraft extends WebTestCase {
- <strong>
- function testHomepage() {
- $this-&gt;assertTrue($this-&gt;get('http://www.lastcraft.com/'));
- }</strong>
-}
-</pre>
- The <span class="new_code">get()</span> method will
- return true only if page content was successfully
- loaded.
- It is a simple, but crude way to check that a web page
- was actually delivered by the web server.
- However that content may be a 404 response and yet
- our <span class="new_code">get()</span> method will still return true.
- </p>
- <p>
- Assuming that the web server for the Last Craft site is up
- (sadly not always the case), we should see...
-<pre class="shell">
-Web site tests
-OK
-Test cases run: 1/1, Failures: 0, Exceptions: 0
-</pre>
- All we have really checked is that any kind of page was
- returned.
- We don't yet know if it was the right one.
- </p>
-
- <p>
-<a class="target" name="content">
-<h2>Testing page content</h2>
-</a>
-</p>
- <p>
- To confirm that the page we think we are on is actually the
- page we are on, we need to verify the page content.
-<pre>
-class TestOfLastcraft extends WebTestCase {
-
- function testHomepage() {<strong>
- $this-&gt;get('http://www.lastcraft.com/');
- $this-&gt;assertWantedPattern('/why the last craft/i');</strong>
- }
-}
-</pre>
- The page from the last fetch is held in a buffer in
- the test case, so there is no need to refer to it directly.
- The pattern match is always made against the buffer.
- </p>
- <p>
- Here is the list of possible content assertions...
- <table>
-<tbody>
- <tr>
-<td><span class="new_code">assertTitle($title)</span></td><td>Pass if title is an exact match</td>
-</tr>
- <tr>
-<td><span class="new_code">assertWantedPattern($pattern)</span></td><td>A Perl pattern match against the page content</td>
-</tr>
- <tr>
-<td><span class="new_code">assertNoUnwantedPattern($pattern)</span></td><td>A Perl pattern match to not find content</td>
-</tr>
- <tr>
-<td><span class="new_code">assertWantedText($text)</span></td><td>Pass if matches visible and "alt" text</td>
-</tr>
- <tr>
-<td><span class="new_code">assertNoUnwantedText($text)</span></td><td>Pass if doesn't match visible and "alt" text</td>
-</tr>
- <tr>
-<td><span class="new_code">assertLink($label)</span></td><td>Pass if a link with this text is present</td>
-</tr>
- <tr>
-<td><span class="new_code">assertNoLink($label)</span></td><td>Pass if no link with this text is present</td>
-</tr>
- <tr>
-<td><span class="new_code">assertLinkById($id)</span></td><td>Pass if a link with this id attribute is present</td>
-</tr>
- <tr>
-<td><span class="new_code">assertNoLinkById($id)</span></td><td>Pass if no link with this id attribute is present</td>
-</tr>
- <tr>
-<td><span class="new_code">assertField($name, $value)</span></td><td>Pass if an input tag with this name has this value</td>
-</tr>
- <tr>
-<td><span class="new_code">assertFieldById($id, $value)</span></td><td>Pass if an input tag with this id has this value</td>
-</tr>
- <tr>
-<td><span class="new_code">assertResponse($codes)</span></td><td>Pass if HTTP response matches this list</td>
-</tr>
- <tr>
-<td><span class="new_code">assertMime($types)</span></td><td>Pass if MIME type is in this list</td>
-</tr>
- <tr>
-<td><span class="new_code">assertAuthentication($protocol)</span></td><td>Pass if the current challenge is this protocol</td>
-</tr>
- <tr>
-<td><span class="new_code">assertNoAuthentication()</span></td><td>Pass if there is no current challenge</td>
-</tr>
- <tr>
-<td><span class="new_code">assertRealm($name)</span></td><td>Pass if the current challenge realm matches</td>
-</tr>
- <tr>
-<td><span class="new_code">assertHeader($header, $content)</span></td><td>Pass if a header was fetched matching this value</td>
-</tr>
- <tr>
-<td><span class="new_code">assertNoUnwantedHeader($header)</span></td><td>Pass if a header was not fetched</td>
-</tr>
- <tr>
-<td><span class="new_code">assertHeaderPattern($header, $pattern)</span></td><td>Pass if a header was fetched matching this Perl regex</td>
-</tr>
- <tr>
-<td><span class="new_code">assertCookie($name, $value)</span></td><td>Pass if there is currently a matching cookie</td>
-</tr>
- <tr>
-<td><span class="new_code">assertNoCookie($name)</span></td><td>Pass if there is currently no cookie of this name</td>
-</tr>
- </tbody>
-</table>
- As usual with the SimpleTest assertions, they all return
- false on failure and true on pass.
- They also allow an optional test message and you can embed
- the original test message inside using "%s" inside
- your custom message.
- </p>
- <p>
- So now we could instead test against the title tag with...
-<pre>
-<strong>$this-&gt;assertTitle('The Last Craft? Web developer tutorials on PHP, Extreme programming and Object Oriented development');</strong>
-</pre>
- As well as the simple HTML content checks we can check
- that the MIME type is in a list of allowed types with...
-<pre>
-<strong>$this-&gt;assertMime(array('text/plain', 'text/html'));</strong>
-</pre>
- More interesting is checking the HTTP response code.
- Like the MIME type, we can assert that the response code
- is in a list of allowed values...
-<pre>
-class TestOfLastcraft extends WebTestCase {
-
- function testRedirects() {
- $this-&gt;get('http://www.lastcraft.com/test/redirect.php');
- $this-&gt;assertResponse(200);&lt;/strong&gt;
- }
-}
-</pre>
- Here we are checking that the fetch is successful by
- allowing only a 200 HTTP response.
- This test will pass, but it is not actually correct to do so.
- There is no page, instead the server issues a redirect.
- The <span class="new_code">WebTestCase</span> will
- automatically follow up to three such redirects.
- The tests are more robust this way and we are usually
- interested in the interaction with the pages rather
- than their delivery.
- If the redirects are of interest then this ability must
- be disabled...
-<pre>
-class TestOfLastcraft extends WebTestCase {
-
- function testHomepage() {<strong>
- $this-&gt;setMaximumRedirects(0);</strong>
- $this-&gt;get('http://www.lastcraft.com/test/redirect.php');
- $this-&gt;assertResponse(200);
- }
-}
-</pre>
- The assertion now fails as expected...
-<pre class="shell">
-Web site tests
-1) Expecting response in [200] got [302]
- in testhomepage
- in testoflastcraft
- in lastcraft_test.php
-FAILURES!!!
-Test cases run: 1/1, Failures: 1, Exceptions: 0
-</pre>
- We can modify the test to correctly assert redirects with...
-<pre>
-class TestOfLastcraft extends WebTestCase {
-
- function testHomepage() {
- $this-&gt;setMaximumRedirects(0);
- $this-&gt;get('http://www.lastcraft.com/test/redirect.php');
- $this-&gt;assertResponse(<strong>array(301, 302, 303, 307)</strong>);
- }
-}
-</pre>
- This now passes.
- </p>
-
- <p>
-<a class="target" name="navigation">
-<h2>Navigating a web site</h2>
-</a>
-</p>
- <p>
- Users don't often navigate sites by typing in URLs, but by
- clicking links and buttons.
- Here we confirm that the contact details can be reached
- from the home page...
-<pre>
-class TestOfLastcraft extends WebTestCase {
- ...
- function testContact() {
- $this-&gt;get('http://www.lastcraft.com/');<strong>
- $this-&gt;clickLink('About');
- $this-&gt;assertTitle('About Last Craft');</strong>
- }
-}
-</pre>
- The parameter is the text of the link.
- </p>
- <p>
- If the target is a button rather than an anchor tag, then
- <span class="new_code">clickSubmit()</span> should be used
- with the button title...
-<pre>
-<strong>$this-&gt;clickSubmit('Go!');</strong>
-</pre>
- </p>
- <p>
- The list of navigation methods is...
- <table>
-<tbody>
- <tr>
-<td><span class="new_code">getUrl()</span></td><td>The current location</td>
-</tr>
- <tr>
-<td><span class="new_code">get($url, $parameters)</span></td><td>Send a GET request with these parameters</td>
-</tr>
- <tr>
-<td><span class="new_code">post($url, $parameters)</span></td><td>Send a POST request with these parameters</td>
-</tr>
- <tr>
-<td><span class="new_code">head($url, $parameters)</span></td><td>Send a HEAD request without replacing the page content</td>
-</tr>
- <tr>
-<td><span class="new_code">retry()</span></td><td>Reload the last request</td>
-</tr>
- <tr>
-<td><span class="new_code">back()</span></td><td>Like the browser back button</td>
-</tr>
- <tr>
-<td><span class="new_code">forward()</span></td><td>Like the browser forward button</td>
-</tr>
- <tr>
-<td><span class="new_code">authenticate($name, $password)</span></td><td>Retry after a challenge</td>
-</tr>
- <tr>
-<td><span class="new_code">restart()</span></td><td>Restarts the browser as if a new session</td>
-</tr>
- <tr>
-<td><span class="new_code">getCookie($name)</span></td><td>Gets the cookie value for the current context</td>
-</tr>
- <tr>
-<td><span class="new_code">ageCookies($interval)</span></td><td>Ages current cookies prior to a restart</td>
-</tr>
- <tr>
-<td><span class="new_code">clearFrameFocus()</span></td><td>Go back to treating all frames as one page</td>
-</tr>
- <tr>
-<td><span class="new_code">clickSubmit($label)</span></td><td>Click the first button with this label</td>
-</tr>
- <tr>
-<td><span class="new_code">clickSubmitByName($name)</span></td><td>Click the button with this name attribute</td>
-</tr>
- <tr>
-<td><span class="new_code">clickSubmitById($id)</span></td><td>Click the button with this ID attribute</td>
-</tr>
- <tr>
-<td><span class="new_code">clickImage($label, $x, $y)</span></td><td>Click an input tag of type image by title or alt text</td>
-</tr>
- <tr>
-<td><span class="new_code">clickImageByName($name, $x, $y)</span></td><td>Click an input tag of type image by name</td>
-</tr>
- <tr>
-<td><span class="new_code">clickImageById($id, $x, $y)</span></td><td>Click an input tag of type image by ID attribute</td>
-</tr>
- <tr>
-<td><span class="new_code">submitFormById($id)</span></td><td>Submit a form without the submit value</td>
-</tr>
- <tr>
-<td><span class="new_code">clickLink($label, $index)</span></td><td>Click an anchor by the visible label text</td>
-</tr>
- <tr>
-<td><span class="new_code">clickLinkById($id)</span></td><td>Click an anchor by the ID attribute</td>
-</tr>
- <tr>
-<td><span class="new_code">getFrameFocus()</span></td><td>The name of the currently selected frame</td>
-</tr>
- <tr>
-<td><span class="new_code">setFrameFocusByIndex($choice)</span></td><td>Focus on a frame counting from 1</td>
-</tr>
- <tr>
-<td><span class="new_code">setFrameFocus($name)</span></td><td>Focus on a frame by name</td>
-</tr>
- </tbody>
-</table>
- </p>
- <p>
- The parameters in the <span class="new_code">get()</span>, <span class="new_code">post()</span> or
- <span class="new_code">head()</span> methods are optional.
- The HTTP HEAD fetch does not change the browser context, only loads
- cookies.
- This can be useful for when an image or stylesheet sets a cookie
- for crafty robot blocking.
- </p>
- <p>
- The <span class="new_code">retry()</span>, <span class="new_code">back()</span> and
- <span class="new_code">forward()</span> commands work as they would on
- your web browser.
- They use the history to retry pages.
- This can be handy for checking the effect of hitting the
- back button on your forms.
- </p>
- <p>
- The frame methods need a little explanation.
- By default a framed page is treated just like any other.
- Content will be searced for throughout the entire frameset,
- so clicking a link will work no matter which frame
- the anchor tag is in.
- You can override this behaviour by focusing on a single
- frame.
- If you do that, all searches and actions will apply to that
- frame alone, such as authentication and retries.
- If a link or button is not in a focused frame then it cannot
- be clicked.
- </p>
- <p>
- Testing navigation on fixed pages only tells you when you
- have broken an entire script.
- For highly dynamic pages, such as for bulletin boards, this can
- be crucial for verifying the correctness of the application.
- For most applications though, the really tricky logic is usually in
- the handling of forms and sessions.
- Fortunately SimpleTest includes
- <a href="form_testing_documentation.html">tools for testing web forms</a>
- as well.
- </p>
-
- <p>
-<a class="target" name="request">
-<h2>Modifying the request</h2>
-</a>
-</p>
- <p>
- Although SimpleTest does not have the goal of testing networking
- problems, it does include some methods to modify and debug
- the requests it makes.
- Here is another method list...
- <table>
-<tbody>
- <tr>
-<td><span class="new_code">getTransportError()</span></td><td>The last socket error</td>
-</tr>
- <tr>
-<td><span class="new_code">showRequest()</span></td><td>Dump the outgoing request</td>
-</tr>
- <tr>
-<td><span class="new_code">showHeaders()</span></td><td>Dump the incoming headers</td>
-</tr>
- <tr>
-<td><span class="new_code">showSource()</span></td><td>Dump the raw HTML page content</td>
-</tr>
- <tr>
-<td><span class="new_code">ignoreFrames()</span></td><td>Do not load framesets</td>
-</tr>
- <tr>
-<td><span class="new_code">setCookie($name, $value)</span></td><td>Set a cookie from now on</td>
-</tr>
- <tr>
-<td><span class="new_code">addHeader($header)</span></td><td>Always add this header to the request</td>
-</tr>
- <tr>
-<td><span class="new_code">setMaximumRedirects($max)</span></td><td>Stop after this many redirects</td>
-</tr>
- <tr>
-<td><span class="new_code">setConnectionTimeout($timeout)</span></td><td>Kill the connection after this time between bytes</td>
-</tr>
- <tr>
-<td><span class="new_code">useProxy($proxy, $name, $password)</span></td><td>Make requests via this proxy URL</td>
-</tr>
- </tbody>
-</table>
- These methods are principally for debugging.
- </p>
-
- </div>
-<div class="copyright">
- Copyright<br>Marcus Baker, Jason Sweat, Perrick Penet 2004
- </div>
-</body>
-</html>