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2  <html>  <html>
3  <head>  <head>
4  <title>JSCoverage user manual</title>  <title>JSCoverage user manual</title>
5  <link type="text/css" href="doc.css" rel="stylesheet">  <link rel="stylesheet" type="text/css" href="sh_nedit.min.css">
6    <script src="sh_main.min.js"></script>
7    <script src="sh_html.min.js"></script>
8    <script src="sh_javascript.min.js"></script>
9    <link rel="stylesheet" type="text/css" href="doc.css">
10  </head>  </head>
11  <body>  <body onload="sh_highlightDocument();">
12    
13  <h1>JSCoverage user manual</h1>  <h1>JSCoverage user manual</h1>
14    
15  <p>  <p>
16  JSCoverage is a tool used to measure code coverage in JavaScript programs.  JSCoverage is a tool that measures code coverage in JavaScript programs.
17  </p>  </p>
18    
19  <p>  <p>
# Line 74  Line 78 
78  <h2>Using the <code>jscoverage</code> program</h2>  <h2>Using the <code>jscoverage</code> program</h2>
79    
80  <p>  <p>
81  Using the <code>jscoverage</code> program requires the following steps:  Using the <code>jscoverage</code> program involves the following steps:
82  </p>  </p>
83    
84  <h3>1. Instrumenting code</h3>  <h3>1. Instrumenting code</h3>
# Line 268  Line 272 
272  you launch JSCoverage. To do this you need to add some code to your test page:  you launch JSCoverage. To do this you need to add some code to your test page:
273  </p>  </p>
274    
275  <pre>  <pre class="sh_javascript">
276  window.open("path/to/jscoverage.html");  window.open('path/to/jscoverage.html');
277  </pre>  </pre>
278    
279  <p>  <p>
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288  attach it to a button:  attach it to a button:
289  </p>  </p>
290    
291  <pre>  <pre class="sh_html">
292  &lt;button onclick='window.open("path/to/jscoverage.html");'&gt;Coverage report&lt;/button&gt;  &lt;button onclick="window.open('path/to/jscoverage.html');"&gt;Coverage report&lt;/button&gt;
293  </pre>  </pre>
294    
295  <p>  <p>
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375  <h2>Using the <code>jscoverage-server</code> program</h2>  <h2>Using the <code>jscoverage-server</code> program</h2>
376    
377  <p>  <p>
378  The <code>jscoverage-server</code> program is a simple web server which will  The <code>jscoverage-server</code> program is a simple web server. You can use
379  serve files from the current directory. You can use  <code>jscoverage-server</code> to serve files from the <code>doc/example/</code>
380  <code>jscoverage-server</code> to serve <code>doc/example</code>:  directory:
381  </p>  </p>
382    
383  <pre>  <pre>
# Line 382  Line 386 
386  </pre>  </pre>
387    
388  <p>  <p>
389  By default, the server runs on port 8080.  URLs are mapped to files in the  Once the server is running, you can access the JSCoverage web interface by
390  <code>doc/example</code> directory: e.g., the URL  visiting the URL <code>http://127.0.0.1:8080/jscoverage.html</code>, and you can
391  <code>http://127.0.0.1:8080/index.html</code> can be used to request  load the <code>doc/example/index.html</code> file by entering
392  <code>doc/example/index.html</code>.  In addition, the special URL  <code>index.html</code> in the "URL" input field.  (Or you can do this all in
393  <code>http://127.0.0.1:8080/jscoverage.html</code> provides the JSCoverage web  one step by loading the URL
394  interface.  Note that it is not necessary that a file named  <code>http://127.0.0.1:8080/jscoverage.html?index.html</code> in your web
395  <code>jscoverage.html</code> exist; the JSCoverage web  browser.)  The
396  interface is built into the server, and it will automatically be served when the special  <code>jscoverage-server</code> program automatically instruments any served
 <code>/jscoverage.html</code> URL is requested.  
 </p>  
   
 <p>  
 You can use the <code>/jscoverage.html</code> URL in the same way as the  
 <code>jscoverage.html</code> file generated by the <code>jscoverage</code>  
 program. For example, you can visit the URL  
 <code>http://127.0.0.1:8080/jscoverage.html?index.html</code> to execute the  
 JavaScript associated with the <code>index.html</code> page.  The  
 <code>jscoverage-server</code> program automatically instruments all served  
397  JavaScript code, so that code coverage data will be gathered as the code is  JavaScript code, so that code coverage data will be gathered as the code is
398  executed in your browser.  executed in your browser.
399  </p>  </p>
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409  <p>  <p>
410  When you click the "Store" button, the coverage data will be saved to a directory named <code>jscoverage-report/</code>.  When you click the "Store" button, the coverage data will be saved to a directory named <code>jscoverage-report/</code>.
411  You can view this stored report at any time by opening the file <code>jscoverage-report/jscoverage.html</code> in  You can view this stored report at any time by opening the file <code>jscoverage-report/jscoverage.html</code> in
412  your web browser - you don't need the <code>jscoverage-server</code> running to see it.  your web browser - you don't need the <code>jscoverage-server</code> running to access it.
413  </p>  </p>
414    
415  <p>  <p>
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420  </p>  </p>
421    
422  <p>  <p>
 You can also store data programmatically from your tests by adding the following to your  
 JavaScript code:  
 </p>  
   
 <pre>  
 if (top.jscoverage_report) {  
   top.jscoverage_report();  
 }  
 </pre>  
   
 <p>  
423  You can stop the server by running another instance of <code>jscoverage-server</code> with the  You can stop the server by running another instance of <code>jscoverage-server</code> with the
424  <code>--shutdown</code> option:  <code>--shutdown</code> option:
425  </p>  </p>
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485    
486  <h2>Advanced topics</h2>  <h2>Advanced topics</h2>
487    
488    <h3>Storing coverage reports programmatically</h3>
489    
490    <p>
491    If you are executing a test suite using <code>jscoverage-server</code>, you can
492    store a coverage report programmatically by having your test suite call the
493    <code>jscoverage_report</code> function (automatically generated by
494    <code>jscoverage-server</code>) after all your tests have finished running:
495    </p>
496    
497    <pre class="sh_javascript">
498    if (top.jscoverage_report) {
499      top.jscoverage_report();
500    }
501    </pre>
502    
503    <p>
504    You can specify the name of the directory in which to store the report by
505    passing the name as a parameter to the <code>jscoverage_report</code> function:
506    </p>
507    
508    <pre class="sh_javascript">
509    if (top.jscoverage_report) {
510      // determine the directory name based on the browser
511      var directory;
512      if (/MSIE/.test(navigator.userAgent)) {
513        directory = 'IE';
514      }
515      else {
516        directory = 'other';
517      }
518      top.jscoverage_report(directory);
519    }
520    </pre>
521    
522    <p>
523    This directory will be a subdirectory under the <code>jscoverage-report/</code>
524    directory (or whatever is specified with the <code>--report-dir</code> option).
525    Using the above example, the report would be stored to either
526    <code>jscoverage-report/IE/</code> or <code>jscoverage-report/other/</code>.
527    </p>
528    
529  <h3>Conditional directives</h3>  <h3>Conditional directives</h3>
530    
531  <p>  <p>
532  Sometimes you may wish to exclude certain lines of code from coverage  Sometimes you may wish to exclude certain lines of code from coverage
533  statistics. Some lines of code may be executed only in certain browsers; other  statistics. Some lines of code may be executed only in certain browsers; other
534  lines should never be executed at all (they may only be present to detect  lines should never be executed at all (they may be present only to detect
535  programming errors).  You can use specially formatted comments in your code,  programming errors).  You can use specially formatted comments in your code,
536  called <dfn>conditional directives</dfn>, to tell JSCoverage when to exclude  called <dfn>conditional directives</dfn>, to tell JSCoverage when to exclude
537  those lines from coverage statistics.  These lines will be ignored in the  those lines from coverage statistics.  These lines will be ignored in the
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620  statements, you may get strange results.  statements, you may get strange results.
621  <li>JSCoverage uses frames.  Some web pages that use frames may not function properly when run under JSCoverage, especially  <li>JSCoverage uses frames.  Some web pages that use frames may not function properly when run under JSCoverage, especially
622  those which try to access the top-level frame (<code>window.top</code>, <code>target="_top"</code>, etc.).  those which try to access the top-level frame (<code>window.top</code>, <code>target="_top"</code>, etc.).
623  <li>JSCoverage is alpha software.  Use at your own risk.  <li>JSCoverage is distributed without any warranty.  See the <a href="license.html">license</a> for more details.
624  </ul>  </ul>
625    
626  <address>  <address>

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