@pytest.hookimpl(trylast=True, )
def pytest_sessionfinish(session, exitstatus):
    """
	There seems to be no way of using a hook of pytest-html to provide this summary results, 
	therefore the report is read once created
    and a custom HTML is added with a button which triggers a JS that downloads the XML.
    """
    # Get execution results
    test_cases = {}
    for item, result in session.results.items():

        try:
            tc = re.search(r'^(.+?)_test.py', item.parent.name).group(1)
        except AttributeError:
            logger.error(f'tc not found in module {item.parent.name}')
            raise
        
        # Passed
        if result.passed:
            if tc not in test_cases:
                test_cases[tc] = 'p'
            elif test_cases[tc] == 'f':
                continue
            else:
                test_cases[tc] = 'p'
        
        # Failed
        if result.failed:
            test_cases[tc] = 'f'

    # Generate xml file
	xml = 'x'


    # Get name of the generated report
    output = os.path.join(
        'output',
        'report',
        'my_project',
        datetime.now().strftime("%Y-%m-%d"),
        f'{MY_PROJECT}-test-report.html')

    # Read report
    with open(output) as f:
        lines = f.read()
    
    button = f"""
    <button onclick="downloadBase64File('text/xml','{base64.b64encode(xml.encode('utf8')).decode()}', 'test.xml' )">
    Button to download xml
    </button>
    <span style="color: #756e15;background: #fffbd1;border: 1px solid #87803e;margin: 5px;padding: 5px;" >
        Warning: Add here.
    </span>
    <script>
            function downloadBase64File(contentType, base64Data, fileName) {{
            const linkSource = `data:${{contentType}};base64,${{base64Data}}`;
            const downloadLink = document.createElement("a");
            downloadLink.href = linkSource;
            downloadLink.download = fileName;
            downloadLink.click();
        }}
    </script>
    """
    lines = re.sub(re.escape(
        '</body></html>'),
        f'<div style="padding: 5px;">{button}</div></body></html>',
        lines)
    
    # Save again the report with the same name
    with open(output, 'w') as f:
        f.write(lines)

    @pytest.hookimpl(trylast=True)
    def pytest_sessionfinish(self, session):
        session.config.hook.pytest_html_results_summary(
            prefix=self._report.data["additionalSummary"]["prefix"],
            summary=self._report.data["additionalSummary"]["summary"],
            postfix=self._report.data["additionalSummary"]["postfix"],
        )
        self._report.data["runningState"] = "Finished"
        self._generate_report()

    @pytest.hookimpl(trylast=True)
    def pytest_sessionfinish(self, session):
        session.config.hook.pytest_html_results_summary(
            prefix=self._report.data["additionalSummary"]["prefix"],
            summary=self._report.data["additionalSummary"]["summary"],
            postfix=self._report.data["additionalSummary"]["postfix"],
            session=session,
        )
        self._report.data["runningState"] = "Finished"
        self._generate_report()