Add extra fixture

README.rst

@@ -192,6 +192,17 @@ created hyper link:
 
     extra.append(pytest_html.extras.text('some string', name='Different title'))
 
+It is also possible to use the fixture :code:`extra` to add content directly
+in a test function without implementing hooks. These will generally end up
+before any extras added by plugins.
+
+.. code-block:: python
+
+   from pytest_html import extras
+
+   def test_extra(extra):
+      extra.append(extras.text('some string'))
+
 
 Modifying the results table
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~

pytest_html/plugin.py

@@ -15,6 +15,7 @@ import warnings
 import re
 
 from html import escape
+import pytest
 
 try:
     from ansi2html import Ansi2HTMLConverter, style
@@ -89,6 +90,29 @@ def pytest_unconfigure(config):
         config.pluginmanager.unregister(html)
 
 
+@pytest.hookimpl(tryfirst=True, hookwrapper=True)
+def pytest_runtest_makereport(item, call):
+    outcome = yield
+    report = outcome.get_result()
+    if report.when == "call":
+        fixture_extras = item.funcargs.get("extra", [])
+        plugin_extras = getattr(report, "extra", [])
+        report.extra = fixture_extras + plugin_extras
+
+
+@pytest.fixture
+def extra():
+    """Add details to the HTML reports.
+
+    .. code-block:: python
+
+        import pytest_html
+        def test_foo(extra):
+            extra.append(pytest_html.extras.url('http://www.example.com/'))
+    """
+    return []
+
+
 def data_uri(content, mime_type="text/plain", charset="utf-8"):
     data = b64encode(content.encode(charset)).decode("ascii")
     return f"data:{mime_type};charset={charset};base64,{data}"

testing/test_pytest_html.py

@@ -583,6 +583,20 @@ class TestHTML:
         assert link in html
         assert os.path.exists(src)
 
+    def test_extra_fixture(self, testdir):
+        content = b64encode(b"foo").decode("ascii")
+        testdir.makepyfile(
+            f"""
+            def test_pass(extra):
+                from pytest_html import extras
+                extra.append(extras.png('{content}'))
+        """
+        )
+        result, html = run(testdir, "report.html", "--self-contained-html")
+        assert result.ret == 0
+        src = f"data:image/png;base64,{content}"
+        assert f'<img src="{src}"/>' in html
+
     def test_no_invalid_characters_in_filename(self, testdir):
         testdir.makeconftest(
             """