python之unittest

一、介绍

Unittest框架是专门用来进行执行代码测试的框架。主要用于单元测试。

优势:
1.能组织多个用例去执行
2.提供丰富的断言方法
3.提供丰富的日志与测试结果

环境搭建:
vscode 运行unittest框架,参考:https://blog.youkuaiyun.com/CloserSide/article/details/109175775

unittest核心要素:
1.TestCase
2.TestSuite
3.TextTestRunner
4.Fixture

TestCase

定义单元模块测试方法,每条用例可以定义为一个方法来测试。
注意;方法名必须要以testcase开头

import unittest

def add(a,b):
    return a+b

class TestCase01(unittest.TestCase):
    def testcase_01(self):
        print("test11111111111111111111111111") 
        a=b=1
        print(f'{a}+{b}={add(a,b)}')
    
    def testcase_02(self):
        print("test222222222222222222222222") 

正常python文件执行:
1.添加判断,调用函数即可

import unittest

def add(a,b):
    return a+b

class Case01(unittest.TestCase):
    def testcase_01(self):
        print("test11111111111111111111111111") 
        a=b=1
        print(f'{a}+{b}={add(a,b)}')
    
    def testcase_02(self):
        print("test2222222222222222222222223") 

if __name__=='__main__':
    unittest.main()

TestSuite

就是将多条测试用例集合在一起,相当于一个测试套件。

有两种使用方法:1.通过定义的方法添加;2.通过定义的类添加。

import unittest
import test_unit

from test_unit import Case01

suite=unittest.TestSuite()
# #以测试用例类里的每一个方法为单位添加
# suit.addTest(Case01("testcase_01"))

#以测试用例类为单位添加
suit.addTest(unittest.makeSuite(Case01))

runner=unittest.TextTestRunner()
runner.run(suit)

defaultTestLoader

import unittest

#test_dir为要指定的目录,pattern表示查找的py文件的格式
test_dir='./'
discover=unittest.defaultTestLoader.discover(test_dir,pattern="test*.py")

runner=unittest.TextTestRunner()
runner.run(discover)

defaultTestLoader和TestSuite的区别:
1.TestSuite可以添加testcase中的所有test开通的方法和添加指定的test开头方法;
2.defaultTestLoader搜索指定目录下指定开头.py文件,并添加TestCase内所有test开头的方法,不能指定添加方法;

defaultTestLoader属于TestSuite的另一种实现方式。

二、断言

判断预期结果是否符合预期结果。
其他断言方法的使用都是一样的。

import unittest

class case01(unittest.TestCase):
    def testcase_01(self):
        print('1111111')
        try:
            self.assertEqual(2,1)
        except AssertionError as e:
            print(e)

if __name__=='__main__':
    unittest.main()

result:
1111111
2 != 1

三、测试报告

通过HTMLTestRunner生成测试报告:

from pydoc import describe
import unittest
import HTMLTestRunner
from test_unit import Case01

suit=unittest.TestSuite()
suit.addTest(unittest.makeSuite(Case01))

with open('./report.html',"wb") as f:
    h=HTMLTestRunner.HTMLTestRunner(stream=f,title="测试报告")
    h.run(suit)

结果:
在这里插入图片描述

四、登录自动化案例

自动化项目大致结构:
在这里插入图片描述

test_login.py

import unittest
import HTMLTestRunner
from verify_login import verify_login_test


suit=unittest.TestSuite()
suit.addTest(unittest.makeSuite(verify_login_test))

with open('./report.html',"wb") as f:
    h=HTMLTestRunner.HTMLTestRunner(stream=f,title="测试报告")
    h.run(suit)
verify_login.py

from time import strftime
import time
from selenium import webdriver
import unittest

class verify_login_test(unittest.TestCase):
    def setUp(self):
        self.driver=webdriver.Chrome()
        self.driver.implicitly_wait(30)
        self.driver.get("http://120.55.190.222:9090/loginController.do?login2")
        self.driver.maximize_window()

    def tearDown(self):
        self.driver.quit()

    def testcase_login(self):
        account=self.driver.find_element_by_id('userName').send_keys('SQOA001')
        pwd=self.driver.find_element_by_id('password').send_keys('sqtest')

        self.driver.find_element_by_id('but_login').click()
        try:
            login_info=self.driver.find_element_by_xpath('/html/body/div[4]/div[1]/div[1]/nav/ul/li[4]/a').text
            self.assertIn("退出",login_info)
        except AssertionError as e:
            print("登录失败")
            img_name1=time.strftime('%Y%m%d%_%H%M%S')
            self.driver.get_screenshot_as_file('./%s.png' % img_name1)
            raise
        

    def testcase_loginError(self):
        account=self.driver.find_element_by_id('userName').send_keys('SQOA00111')
        pwd=self.driver.find_element_by_id('password').send_keys('sqtest')

        self.driver.find_element_by_id('but_login').click()
        try:
            login_info=self.driver.find_element_by_xpath('/html/body/div[4]/div[1]/div[1]/nav/ul/li[4]/a').text

            self.assertIn("退出",login_info)
        except AssertionError as e:
            print("登录失败")
            img_name=time.strftime('%Y%m%d%_%H%M%S')
            print(img_name)
            self.driver.get_screenshot_as_file('./%s.png' % img_name)
            raise

HTMLTestRunner正文

注意HTMLTestRunner网站的脚本只适用于python2,python3会报错,提供以下正常的内容。

"""
A TestRunner for use with the Python unit testing framework. It
generates a HTML report to show the result at a glance.

The simplest way to use this is to invoke its main method. E.g.

    import unittest
    import HTMLTestRunner

    ... define your tests ...

    if __name__ == '__main__':
        HTMLTestRunner.main()


For more customization options, instantiates a HTMLTestRunner object.
HTMLTestRunner is a counterpart to unittest's TextTestRunner. E.g.

    # output to a file
    fp = file('my_report.html', 'wb')
    runner = HTMLTestRunner.HTMLTestRunner(
                stream=fp,
                title='My unit test',
                description='This demonstrates the report output by HTMLTestRunner.'
                )

    # Use an external stylesheet.
    # See the Template_mixin class for more customizable options
    runner.STYLESHEET_TMPL = '<link rel="stylesheet" href="my_stylesheet.css" type="text/css">'

    # run the test
    runner.run(my_test_suite)


------------------------------------------------------------------------
Copyright (c) 2004-2007, Wai Yip Tung
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.
* Neither the name Wai Yip Tung nor the names of its contributors may be
  used to endorse or promote products derived from this software without
  specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""

# URL: http://tungwaiyip.info/software/HTMLTestRunner.html

__author__ = "Wai Yip Tung"
__version__ = "0.8.2"


"""
Change History

Version 0.8.2
* Show output inline instead of popup window (Viorel Lupu).

Version in 0.8.1
* Validated XHTML (Wolfgang Borgert).
* Added description of test classes and test cases.

Version in 0.8.0
* Define Template_mixin class for customization.
* Workaround a IE 6 bug that it does not treat <script> block as CDATA.

Version in 0.7.1
* Back port to Python 2.3 (Frank Horowitz).
* Fix missing scroll bars in detail log (Podi).
"""

# TODO: color stderr
# TODO: simplify javascript using ,ore than 1 class in the class attribute?

import datetime
import io
import sys
import time
import unittest
from xml.sax import saxutils


# ------------------------------------------------------------------------
# The redirectors below are used to capture output during testing. Output
# sent to sys.stdout and sys.stderr are automatically captured. However
# in some cases sys.stdout is already cached before HTMLTestRunner is
# invoked (e.g. calling logging.basicConfig). In order to capture those
# output, use the redirectors for the cached stream.
#
# e.g.
#   >>> logging.basicConfig(stream=HTMLTestRunner.stdout_redirector)
#   >>>

class OutputRedirector(object):
    """ Wrapper to redirect stdout or stderr """
    def __init__(self, fp):
        self.fp = fp

    def write(self, s):
        self.fp.write(s)

    def writelines(self, lines):
        self.fp.writelines(lines)

    def flush(self):
        self.fp.flush()

stdout_redirector = OutputRedirector(sys.stdout)
stderr_redirector = OutputRedirector(sys.stderr)



# ----------------------------------------------------------------------
# Template

class Template_mixin(object):
    """
    Define a HTML template for report customerization and generation.

    Overall structure of an HTML report

    HTML
    +------------------------+
    |<html>                  |
    |  <head>                |
    |                        |
    |   STYLESHEET           |
    |   +----------------+   |
    |   |                |   |
    |   +----------------+   |
    |                        |
    |  </head>               |
    |                        |
    |  <body>                |
    |                        |
    |   HEADING              |
    |   +----------------+   |
    |   |                |   |
    |   +----------------+   |
    |                        |
    |   REPORT               |
    |   +----------------+   |
    |   |                |   |
    |   +----------------+   |
    |                        |
    |   ENDING               |
    |   +----------------+   |
    |   |                |   |
    |   +----------------+   |
    |                        |
    |  </body>               |
    |</html>                 |
    +------------------------+
    """

    STATUS = {
    0: 'pass',
    1: 'fail',
    2: 'error',
    }

    DEFAULT_TITLE = 'Unit Test Report'
    DEFAULT_DESCRIPTION = ''

    # ------------------------------------------------------------------------
    # HTML Template

    HTML_TMPL = r"""<?xml version="1.0" encoding="UTF8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>%(title)s</title>
    <meta name="generator" content="%(generator)s"/>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF8"/>
    %(stylesheet)s
</head>
<body>
<script language="javascript" type="text/javascript"><!--
output_list = Array();

/* level - 0:Summary; 1:Failed; 2:All */
function showCase(level) {
    trs = document.getElementsByTagName("tr");
    for (var i = 0; i < trs.length; i++) {
        tr = trs[i];
        id = tr.id;
        if (id.substr(0,2) == 'ft') {
            if (level < 1) {
                tr.className = 'hiddenRow';
            }
            else {
                tr.className = '';
            }
        }
        if (id.substr(0,2) == 'pt') {
            if (level > 1) {
                tr.className = '';
            }
            else {
                tr.className = 'hiddenRow';
            }
        }
    }
}


function showClassDetail(cid, count) {
    var id_list = Array(count);
    var toHide = 1;
    for (var i = 0; i < count; i++) {
        tid0 = 't' + cid.substr(1) + '.' + (i+1);
        tid = 'f' + tid0;
        tr = document.getElementById(tid);
        if (!tr) {
            tid = 'p' + tid0;
            tr = document.getElementById(tid);
        }
        id_list[i] = tid;
        if (tr.className) {
            toHide = 0;
        }
    }
    for (var i = 0; i < count; i++) {
        tid = id_list[i];
        if (toHide) {
            document.getElementById('div_'+tid).style.display = 'none'
            document.getElementById(tid).className = 'hiddenRow';
        }
        else {
            document.getElementById(tid).className = '';
        }
    }
}


function showTestDetail(div_id){
    var details_div = document.getElementById(div_id)
    var displayState = details_div.style.display
    // alert(displayState)
    if (displayState != 'block' ) {
        displayState = 'block'
        details_div.style.display = 'block'
    }
    else {
        details_div.style.display = 'none'
    }
}


function html_escape(s) {
    s = s.replace(/&/g,'&amp;');
    s = s.replace(/</g,'&lt;');
    s = s.replace(/>/g,'&gt;');
    return s;
}

/* obsoleted by detail in <div>
function showOutput(id, name) {
    var w = window.open("", //url
                    name,
                    "resizable,scrollbars,status,width=800,height=450");
    d = w.document;
    d.write("<pre>");
    d.write(html_escape(output_list[id]));
    d.write("\n");
    d.write("<a href='javascript:window.close()'>close</a>\n");
    d.write("</pre>\n");
    d.close();
}
*/
--></script>

%(heading)s
%(report)s
%(ending)s

</body>
</html>
"""
    # variables: (title, generator, stylesheet, heading, report, ending)


    # ------------------------------------------------------------------------
    # Stylesheet
    #
    # alternatively use a <link> for external style sheet, e.g.
    #   <link rel="stylesheet" href="$url" type="text/css">

    STYLESHEET_TMPL = """
<style type="text/css" media="screen">
body        { font-family: verdana, arial, helvetica, sans-serif; font-size: 80%; }
table       { font-size: 100%; }
pre         { }

/* -- heading ---------------------------------------------------------------------- */
h1 {
	font-size: 16pt;
	color: gray;
}
.heading {
    margin-top: 0ex;
    margin-bottom: 1ex;
}

.heading .attribute {
    margin-top: 1ex;
    margin-bottom: 0;
}

.heading .description {
    margin-top: 4ex;
    margin-bottom: 6ex;
}

/* -- css div popup ------------------------------------------------------------------------ */
a.popup_link {
}

a.popup_link:hover {
    color: red;
}

.popup_window {
    display: none;
    position: relative;
    left: 0px;
    top: 0px;
    /*border: solid #627173 1px; */
    padding: 10px;
    background-color: #E6E6D6;
    font-family: "Lucida Console", "Courier New", Courier, monospace;
    text-align: left;
    font-size: 8pt;
    width: 500px;
}

}
/* -- report ------------------------------------------------------------------------ */
#show_detail_line {
    margin-top: 3ex;
    margin-bottom: 1ex;
}
#result_table {
    width: 80%;
    border-collapse: collapse;
    border: 1px solid #777;
}
#header_row {
    font-weight: bold;
    color: white;
    background-color: #777;
}
#result_table td {
    border: 1px solid #777;
    padding: 2px;
}
#total_row  { font-weight: bold; }
.passClass  { background-color: #6c6; }
.failClass  { background-color: #c60; }
.errorClass { background-color: #c00; }
.passCase   { color: #6c6; }
.failCase   { color: #c60; font-weight: bold; }
.errorCase  { color: #c00; font-weight: bold; }
.hiddenRow  { display: none; }
.testcase   { margin-left: 2em; }


/* -- ending ---------------------------------------------------------------------- */
#ending {
}

</style>
"""



    # ------------------------------------------------------------------------
    # Heading
    #

    HEADING_TMPL = """<div class='heading'>
<h1>%(title)s</h1>
%(parameters)s
<p class='description'>%(description)s</p>
</div>

""" # variables: (title, parameters, description)

    HEADING_ATTRIBUTE_TMPL = """<p class='attribute'><strong>%(name)s:</strong> %(value)s</p>
""" # variables: (name, value)



    # ------------------------------------------------------------------------
    # Report
    #

    REPORT_TMPL = """
<p id='show_detail_line'>Show
<a href='javascript:showCase(0)'>Summary</a>
<a href='javascript:showCase(1)'>Failed</a>
<a href='javascript:showCase(2)'>All</a>
</p>
<table id='result_table'>
<colgroup>
<col align='left' />
<col align='right' />
<col align='right' />
<col align='right' />
<col align='right' />
<col align='right' />
</colgroup>
<tr id='header_row'>
    <td>Test Group/Test case</td>
    <td>Count</td>
    <td>Pass</td>
    <td>Fail</td>
    <td>Error</td>
    <td>View</td>
</tr>
%(test_list)s
<tr id='total_row'>
    <td>Total</td>
    <td>%(count)s</td>
    <td>%(Pass)s</td>
    <td>%(fail)s</td>
    <td>%(error)s</td>
    <td>&nbsp;</td>
</tr>
</table>
""" # variables: (test_list, count, Pass, fail, error)

    REPORT_CLASS_TMPL = r"""
<tr class='%(style)s'>
    <td>%(desc)s</td>
    <td>%(count)s</td>
    <td>%(Pass)s</td>
    <td>%(fail)s</td>
    <td>%(error)s</td>
    <td><a href="javascript:showClassDetail('%(cid)s',%(count)s)">Detail</a></td>
</tr>
""" # variables: (style, desc, count, Pass, fail, error, cid)


    REPORT_TEST_WITH_OUTPUT_TMPL = r"""
<tr id='%(tid)s' class='%(Class)s'>
    <td class='%(style)s'><div class='testcase'>%(desc)s</div></td>
    <td colspan='5' align='center'>

    <!--css div popup start-->
    <a class="popup_link" οnfοcus='this.blur();' href="javascript:showTestDetail('div_%(tid)s')" >
        %(status)s</a>

    <div id='div_%(tid)s' class="popup_window">
        <div style='text-align: right; color:red;cursor:pointer'>
        <a οnfοcus='this.blur();' οnclick="document.getElementById('div_%(tid)s').style.display = 'none' " >
           [x]</a>
        </div>
        <pre>
        %(script)s
        </pre>
    </div>
    <!--css div popup end-->

    </td>
</tr>
""" # variables: (tid, Class, style, desc, status)


    REPORT_TEST_NO_OUTPUT_TMPL = r"""
<tr id='%(tid)s' class='%(Class)s'>
    <td class='%(style)s'><div class='testcase'>%(desc)s</div></td>
    <td colspan='5' align='center'>%(status)s</td>
</tr>
""" # variables: (tid, Class, style, desc, status)


    REPORT_TEST_OUTPUT_TMPL = r"""
%(id)s: %(output)s
""" # variables: (id, output)



    # ------------------------------------------------------------------------
    # ENDING
    #

    ENDING_TMPL = """<div id='ending'>&nbsp;</div>"""

# -------------------- The end of the Template class -------------------


TestResult = unittest.TestResult

class _TestResult(TestResult):
    # note: _TestResult is a pure representation of results.
    # It lacks the output and reporting ability compares to unittest._TextTestResult.

    def __init__(self, verbosity=1):
        TestResult.__init__(self)
        self.stdout0 = None
        self.stderr0 = None
        self.success_count = 0
        self.failure_count = 0
        self.error_count = 0
        self.verbosity = verbosity

        # result is a list of result in 4 tuple
        # (
        #   result code (0: success; 1: fail; 2: error),
        #   TestCase object,
        #   Test output (byte string),
        #   stack trace,
        # )
        self.result = []


    def startTest(self, test):
        TestResult.startTest(self, test)
        # just one buffer for both stdout and stderr
        self.outputBuffer = io.StringIO()
        stdout_redirector.fp = self.outputBuffer
        stderr_redirector.fp = self.outputBuffer
        self.stdout0 = sys.stdout
        self.stderr0 = sys.stderr
        sys.stdout = stdout_redirector
        sys.stderr = stderr_redirector


    def complete_output(self):
        """
        Disconnect output redirection and return buffer.
        Safe to call multiple times.
        """
        if self.stdout0:
            sys.stdout = self.stdout0
            sys.stderr = self.stderr0
            self.stdout0 = None
            self.stderr0 = None
        return self.outputBuffer.getvalue()


    def stopTest(self, test):
        # Usually one of addSuccess, addError or addFailure would have been called.
        # But there are some path in unittest that would bypass this.
        # We must disconnect stdout in stopTest(), which is guaranteed to be called.
        self.complete_output()


    def addSuccess(self, test):
        self.success_count += 1
        TestResult.addSuccess(self, test)
        output = self.complete_output()
        self.result.append((0, test, output, ''))
        if self.verbosity > 1:
            sys.stderr.write('ok ')
            sys.stderr.write(str(test))
            sys.stderr.write('\n')
        else:
            sys.stderr.write('.')

    def addError(self, test, err):
        self.error_count += 1
        TestResult.addError(self, test, err)
        _, _exc_str = self.errors[-1]
        output = self.complete_output()
        self.result.append((2, test, output, _exc_str))
        if self.verbosity > 1:
            sys.stderr.write('E  ')
            sys.stderr.write(str(test))
            sys.stderr.write('\n')
        else:
            sys.stderr.write('E')

    def addFailure(self, test, err):
        self.failure_count += 1
        TestResult.addFailure(self, test, err)
        _, _exc_str = self.failures[-1]
        output = self.complete_output()
        self.result.append((1, test, output, _exc_str))
        if self.verbosity > 1:
            sys.stderr.write('F  ')
            sys.stderr.write(str(test))
            sys.stderr.write('\n')
        else:
            sys.stderr.write('F')


class HTMLTestRunner(Template_mixin):
    """
    """
    def __init__(self, stream=sys.stdout, verbosity=1, title=None, description=None):
        self.stream = stream
        self.verbosity = verbosity
        if title is None:
            self.title = self.DEFAULT_TITLE
        else:
            self.title = title
        if description is None:
            self.description = self.DEFAULT_DESCRIPTION
        else:
            self.description = description

        self.startTime = datetime.datetime.now()


    def run(self, test):
        "Run the given test case or test suite."
        result = _TestResult(self.verbosity)
        test(result)
        self.stopTime = datetime.datetime.now()
        self.generateReport(test, result)
        print (sys.stderr, '\nTime Elapsed: %s' % (self.stopTime-self.startTime))
        return result


    def sortResult(self, result_list):
        # unittest does not seems to run in any particular order.
        # Here at least we want to group them together by class.
        rmap = {}
        classes = []
        for n,t,o,e in result_list:
            cls = t.__class__
            if not cls in rmap:
                rmap[cls] = []
                classes.append(cls)
            rmap[cls].append((n,t,o,e))
        r = [(cls, rmap[cls]) for cls in classes]
        return r


    def getReportAttributes(self, result):
        """
        Return report attributes as a list of (name, value).
        Override this to add custom attributes.
        """
        startTime = str(self.startTime)[:19]
        duration = str(self.stopTime - self.startTime)
        status = []
        if result.success_count: status.append('Pass %s'    % result.success_count)
        if result.failure_count: status.append('Failure %s' % result.failure_count)
        if result.error_count:   status.append('Error %s'   % result.error_count  )
        if status:
            status = ' '.join(status)
        else:
            status = 'none'
        return [
            ('Start Time', startTime),
            ('Duration', duration),
            ('Status', status),
        ]


    def generateReport(self, test, result):
        report_attrs = self.getReportAttributes(result)
        generator = 'HTMLTestRunner %s' % __version__
        stylesheet = self._generate_stylesheet()
        heading = self._generate_heading(report_attrs)
        report = self._generate_report(result)
        ending = self._generate_ending()
        output = self.HTML_TMPL % dict(
            title = saxutils.escape(self.title),
            generator = generator,
            stylesheet = stylesheet,
            heading = heading,
            report = report,
            ending = ending,
        )
        self.stream.write(output.encode('utf8'))


    def _generate_stylesheet(self):
        return self.STYLESHEET_TMPL


    def _generate_heading(self, report_attrs):
        a_lines = []
        for name, value in report_attrs:
            line = self.HEADING_ATTRIBUTE_TMPL % dict(
                    name = saxutils.escape(name),
                    value = saxutils.escape(value),
                )
            a_lines.append(line)
        heading = self.HEADING_TMPL % dict(
            title = saxutils.escape(self.title),
            parameters = ''.join(a_lines),
            description = saxutils.escape(self.description),
        )
        return heading


    def _generate_report(self, result):
        rows = []
        sortedResult = self.sortResult(result.result)
        for cid, (cls, cls_results) in enumerate(sortedResult):
            # subtotal for a class
            np = nf = ne = 0
            for n,t,o,e in cls_results:
                if n == 0: np += 1
                elif n == 1: nf += 1
                else: ne += 1

            # format class description
            if cls.__module__ == "__main__":
                name = cls.__name__
            else:
                name = "%s.%s" % (cls.__module__, cls.__name__)
            doc = cls.__doc__ and cls.__doc__.split("\n")[0] or ""
            desc = doc and '%s: %s' % (name, doc) or name

            row = self.REPORT_CLASS_TMPL % dict(
                style = ne > 0 and 'errorClass' or nf > 0 and 'failClass' or 'passClass',
                desc = desc,
                count = np+nf+ne,
                Pass = np,
                fail = nf,
                error = ne,
                cid = 'c%s' % (cid+1),
            )
            rows.append(row)

            for tid, (n,t,o,e) in enumerate(cls_results):
                self._generate_report_test(rows, cid, tid, n, t, o, e)

        report = self.REPORT_TMPL % dict(
            test_list = ''.join(rows),
            count = str(result.success_count+result.failure_count+result.error_count),
            Pass = str(result.success_count),
            fail = str(result.failure_count),
            error = str(result.error_count),
        )
        return report


    def _generate_report_test(self, rows, cid, tid, n, t, o, e):
        # e.g. 'pt1.1', 'ft1.1', etc
        has_output = bool(o or e)
        tid = (n == 0 and 'p' or 'f') + 't%s.%s' % (cid+1,tid+1)
        name = t.id().split('.')[-1]
        doc = t.shortDescription() or ""
        desc = doc and ('%s: %s' % (name, doc)) or name
        tmpl = has_output and self.REPORT_TEST_WITH_OUTPUT_TMPL or self.REPORT_TEST_NO_OUTPUT_TMPL

        # o and e should be byte string because they are collected from stdout and stderr?
        if isinstance(o,str):
            # TODO: some problem with 'string_escape': it escape \n and mess up formating
            # uo = unicode(o.encode('string_escape'))
            uo = e
        else:
            uo = o
        if isinstance(e,str):
            # TODO: some problem with 'string_escape': it escape \n and mess up formating
            # ue = unicode(e.encode('string_escape'))
            ue = e
        else:
            ue = e

        script = self.REPORT_TEST_OUTPUT_TMPL % dict(
            id = tid,
            output = saxutils.escape(uo+ue),
        )

        row = tmpl % dict(
            tid = tid,
            Class = (n == 0 and 'hiddenRow' or 'none'),
            style = n == 2 and 'errorCase' or (n == 1 and 'failCase' or 'none'),
            desc = desc,
            script = script,
            status = self.STATUS[n],
        )
        rows.append(row)
        if not has_output:
            return

    def _generate_ending(self):
        return self.ENDING_TMPL


##############################################################################
# Facilities for running tests from the command line
##############################################################################

# Note: Reuse unittest.TestProgram to launch test. In the future we may
# build our own launcher to support more specific command line
# parameters like test title, CSS, etc.
class TestProgram(unittest.TestProgram):
    """
    A variation of the unittest.TestProgram. Please refer to the base
    class for command line parameters.
    """
    def runTests(self):
        # Pick HTMLTestRunner as the default test runner.
        # base class's testRunner parameter is not useful because it means
        # we have to instantiate HTMLTestRunner before we know self.verbosity.
        if self.testRunner is None:
            self.testRunner = HTMLTestRunner(verbosity=self.verbosity)
        unittest.TestProgram.runTests(self)

main = TestProgram

##############################################################################
# Executing this module from the command line
##############################################################################

if __name__ == "__main__":
    main(module=None)
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