Python+Selenium学习--自动生成HTML测试报告

前言

在脚本运行完成之后，除了在log.txt 文件看到运行日志外，我们更希望能生一张漂亮的测试报告来展示用例执行的结果。
        HTMLTestRunner 是Python 标准库的unittest 模块的一个扩展。它生成易于使用的HTML 测试报告。HTMLTestRunner 是在BSD 许可证下发布。
        首先要下HTMLTestRunner.py 文件（百度自行搜索）。

代码

#!/usr/bin/env python
# -*- codinfg:utf-8 -*-
'''
@author: Jeff LEE
@file: test_baidu.py
@time: 2018-07-06 14:07
'''
import time,os
import unittest

from  selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains

from test_case import HTMLTestRunner

class TestBaiDu(unittest.TestCase):

    def setUp(self):
        self.driver = webdriver.Firefox()
        # 添加智能等待
        self.driver.implicitly_wait(30)
        self.base_url = 'https://www.baidu.com/'

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

    def test_baidu_search(self):
        u'''百度搜索'''
        driver=self.driver
        driver.get(self.base_url)
        driver.find_element_by_id('kw').send_keys('uniquefu')

        driver.find_element_by_id('su').click()
        time.sleep(3)
        # driver.close()

    def test_baidu_set(self):
        u'''百度设置'''
        driver = self.driver
        driver.get(self.base_url)

        # 进入搜索设置页面
        elment = driver.find_element_by_link_text('设置')
        ActionChains(driver).move_to_element(elment).perform()
        driver.find_element_by_link_text('搜索设置').click()
        time.sleep(5)

        # 修改设置
        driver.find_element_by_id('s1_2').click()
        time.sleep(5)

        # 保存设置
        driver.find_element_by_link_text('保存设置').click()

        # 获取网页上的警告信息并接收警告信息
        alert = driver.switch_to_alert().accept()
        time.sleep(3)

        # driver.close()

if __name__ == '__main__':
    PATH = lambda p: os.path.abspath(
        os.path.join(os.path.dirname(__file__), p)
    )

    # 定义个报告存放路径，支持相对路径
    report = PATH('Report.html')

    with open(report, 'wb') as f:
        testunit = unittest.TestSuite()
        testunit.addTest(unittest.makeSuite(TestBaiDu))
        runner = HTMLTestRunner.HTMLTestRunner(f, verbosity=2, title='百度自动化测试报告--uniquefu', description='百度自动化测试报告')
        runner.run(testunit)

运行结果(自动生成Report.html):

HTMLTestRunner.py

# -*- coding: utf-8 -*-
"""
A TestRunner for use with the Python unit testing framework. It
generates a HTML report to show the results 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__ = "0.9.1"

"""
Change History
Version 0.9.1
* 用Echarts添加执行情况统计图 (灰蓝)

Version 0.9.0
* 改成Python 3.x (灰蓝)

Version 0.8.3
* 使用 Bootstrap稍加美化 (灰蓝)
* 改为中文 (灰蓝)

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 sys
import io
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: u'通过',
        1: u'失败',
        2: u'错误',
    }

    DEFAULT_TITLE = 'Unit Test Report'
    DEFAULT_DESCRIPTION = ''

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

    HTML_TMPL = r"""<?xml version="1.0" encoding="UTF-8"?>
<!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=UTF-8"/>

    <link href="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.bootcss.com/echarts/3.8.5/echarts.common.min.js"></script>
    <!-- <script type="text/javascript" src="js/echarts.common.min.js"></script> -->

    %(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,'&');
        s = s.replace(/</g,'<');
        s = s.replace(/>/g,'>');
        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>

    <div id="div_base">
        %(heading)s
        %(report)s
        %(ending)s
        %(chart_script)s
    </div>
</body>
</html>
"""  # variables: (title, generator, stylesheet, heading, report, ending, chart_script)

    ECHARTS_SCRIPT = """
    <script type="text/javascript">
        // 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('chart'));

        // 指定图表的配置项和数据
        var option = {
            title : {
                text: '测试执行情况',
                x:'center'
            },
            tooltip : {
                trigger: 'item',
                formatter: "{a} <br/>{b} : {c} ({d}%%)"
            },
            color: ['#95b75d', 'grey', '#b64645'],
            legend: {
                orient: 'vertical',
                left: 'left',
                data: ['通过','失败','错误']
            },
            series : [
                {
                    name: '测试执行情况',
                    type: 'pie',
                    radius : '60%%',
                    center: ['50%%', '60%%'],
                    data:[
                        {value:%(Pass)s, name:'通过'},
                        {value:%(fail)s, name:'失败'},
                        {value:%(error)s, name:'错误'}
                    ],
                    itemStyle: {
                        emphasis: {
                            shadowBlur: 10,
                            shadowOffsetX: 0,
                            shadowColor: 'rgba(0, 0, 0, 0.5)'
                        }
                    }
                }
            ]
        };

        // 使用刚指定的配置项和数据显示图表。
        myChart.setOption(option);
    </script>
    """  # variables: (Pass, fail, error)

    # ------------------------------------------------------------------------
    # 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: Microsoft YaHei,Consolas,arial,sans-serif; font-size: 80%; }
    table       { font-size: 100%; }
    pre         { white-space: pre-wrap;word-wrap: break-word; }

    /* -- 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: 2ex;
        margin-bottom: 3ex;
    }

    /* -- 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: 99%;
    }
    #header_row {
        font-weight: bold;
        color: #303641;
        background-color: #ebebeb;
    }
    #total_row  { font-weight: bold; }
    .passClass  { background-color: #bdedbc; }
    .failClass  { background-color: #ffefa4; }
    .errorClass { background-color: #ffc9c9; }
    .passCase   { color: #6c6; }
    .failCase   { color: #FF6600; font-weight: bold; }
    .errorCase  { color: #c00; font-weight: bold; }
    .hiddenRow  { display: none; }
    .testcase   { margin-left: 2em; }

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

    #div_base {
                position:absolute;
                top:0%;
                left:5%;
                right:5%;
                width: auto;
                height: auto;
                margin: -15px 0 0 0;
    }
</style>
"""

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

    HEADING_TMPL = """
    <div class='page-header'>
        <h1>%(title)s</h1>
    %(parameters)s
    </div>
    <div style="float: left;width:50%%;"><p class='description'>%(description)s</p></div>
    <div id="chart" style="width:50%%;height:400px;float:left;"></div>
"""  # variables: (title, parameters, description)

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

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

    REPORT_TMPL = u"""
    <div class="btn-group btn-group-sm">
        <button class="btn btn-default" onclick='javascript:showCase(0)'>总结</button>
        <button class="btn btn-default" onclick='javascript:showCase(1)'>失败</button>
        <button class="btn btn-default" onclick='javascript:showCase(2)'>全部</button>
    </div>
    <p></p>
    <table id='result_table' class="table table-bordered">
        <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>测试套件/测试用例</td>
            <td>总数</td>
            <td>通过</td>
            <td>失败</td>
            <td>错误</td>
            <td>查看</td>
        </tr>
        %(test_list)s
        <tr id='total_row'>
            <td>总计</td>
            <td>%(count)s</td>
            <td>%(Pass)s</td>
            <td>%(fail)s</td>
            <td>%(error)s</td>
            <td> </td>
        </tr>
    </table>
"""  # variables: (test_list, count, Pass, fail, error)

    REPORT_CLASS_TMPL = u"""
    <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)">详情</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" onfocus='this.blur();' href="javascript:showTestDetail('div_%(tid)s')" >
        %(status)s</a>

    <div id='div_%(tid)s' class="popup_window">
        <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'> </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

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

    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):
        if test not in self.subtestlist:
            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')

    def addSubTest(self, test, subtest, err):
        if err is not None:
            if getattr(self, 'failfast', False):
                self.stop()
            if issubclass(err[0], test.failureException):
                self.failure_count += 1
                errors = self.failures
                errors.append((subtest, self._exc_info_to_string(err, subtest)))
                output = self.complete_output()
                self.result.append((1, test, output + '\nSubTestCase Failed:\n' + str(subtest),
                                    self._exc_info_to_string(err, subtest)))
                if self.verbosity > 1:
                    sys.stderr.write('F  ')
                    sys.stderr.write(str(subtest))
                    sys.stderr.write('\n')
                else:
                    sys.stderr.write('F')
            else:
                self.error_count += 1
                errors = self.errors
                errors.append((subtest, self._exc_info_to_string(err, subtest)))
                output = self.complete_output()
                self.result.append(
                    (2, test, output + '\nSubTestCase Error:\n' + str(subtest), self._exc_info_to_string(err, subtest)))
                if self.verbosity > 1:
                    sys.stderr.write('E  ')
                    sys.stderr.write(str(subtest))
                    sys.stderr.write('\n')
                else:
                    sys.stderr.write('E')
            self._mirrorOutput = True
        else:
            self.subtestlist.append(subtest)
            self.subtestlist.append(test)
            self.success_count += 1
            output = self.complete_output()
            self.result.append((0, test, output + '\nSubTestCase Pass:\n' + str(subtest), ''))
            if self.verbosity > 1:
                sys.stderr.write('ok ')
                sys.stderr.write(str(subtest))
                sys.stderr.write('\n')
            else:
                sys.stderr.write('.')

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('\nTime Elapsed: %s' % (self.stopTime-self.startTime), file=sys.stderr)
        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 cls not 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(u'通过 %s' % result.success_count)
        if result.failure_count: status.append(u'失败 %s' % result.failure_count)
        if result.error_count:   status.append(u'错误 %s' % result.error_count  )
        if status:
            status = ' '.join(status)
        else:
            status = 'none'
        return [
            (u'开始时间', startTime),
            (u'运行时长', duration),
            (u'状态', 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()
        chart = self._generate_chart(result)
        output = self.HTML_TMPL % dict(
            title = saxutils.escape(self.title),
            generator = generator,
            stylesheet = stylesheet,
            heading = heading,
            report = report,
            ending = ending,
            chart_script = chart
        )
        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_chart(self, result):
        chart = self.ECHARTS_SCRIPT % dict(
            Pass=str(result.success_count),
            fail=str(result.failure_count),
            error=str(result.error_count),
        )
        return chart

    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

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

        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)