Control render using configuration

README.rst

@@ -240,8 +240,15 @@ Display options
 
 By default, all rows in the **Results** table will be expanded except those that have :code:`Passed`.
 
-This behavior can be customized with a query parameter: :code:`?collapsed=Passed,XFailed,Skipped`.
+This behavior can be customized either with a query parameter: :code:`?collapsed=Passed,XFailed,Skipped`
+or by setting the :code:`render_collapsed` in a configuration file (pytest.ini, setup.cfg, etc).
 
+.. code-block:: ini
+
+  [pytest]
+  render_collapsed = True
+
+**NOTE:** Setting :code:`render_collapsed` will, unlike the query parameter, affect all statuses.
 
 Screenshots
 -----------

pytest_html/plugin.py

@@ -62,6 +62,12 @@ def pytest_addoption(parser):
         default=[],
         help="append given css file content to report style file.",
     )
+    parser.addini(
+        "render_collapsed",
+        type="bool",
+        default=False,
+        help="Open the report with all rows collapsed. Useful for very large reports",
+    )
 
 
 def pytest_configure(config):
@@ -137,9 +143,12 @@ def __init__(self, outcome, report, logfile, config):
             )
 
             if len(cells) > 0:
+                td_class = "extra"
+                if self.config.getini("render_collapsed"):
+                    td_class += " collapsed"
                 self.row_table = html.tr(cells)
                 self.row_extra = html.tr(
-                    html.td(self.additional_html, class_="extra", colspan=len(cells))
+                    html.td(self.additional_html, class_=td_class, colspan=len(cells))
                 )
 
         def __lt__(self, other):

testing/test_pytest_html.py

@@ -418,9 +418,7 @@ def test_extra_image_windows(self, mocker, testdir):
         self.test_extra_image(testdir, "image/png", "png")
         assert mock_isfile.call_count == 1
 
-    @pytest.mark.parametrize(
-        "mime_type, extension", [("video/mp4", "mp4")],
-    )
+    @pytest.mark.parametrize("mime_type, extension", [("video/mp4", "mp4")])
     def test_extra_video(self, testdir, mime_type, extension):
         content = str(random.random())
         testdir.makeconftest(
@@ -882,3 +880,21 @@ def test_pass(utf8):
         result, html = run(testdir)
         assert result.ret == 0
         assert r"\u6d4b\u8bd5\u7528\u4f8b\u540d\u79f0" not in html
+
+    @pytest.mark.parametrize("collapsed", [True, False])
+    def test_collapsed_ini(self, testdir, collapsed):
+        td_class = "extra"
+        if collapsed:
+            td_class += " collapsed"
+        expected_html = f'<td class="{td_class}" colspan="4">'
+        testdir.makeini(
+            f"""
+            [pytest]
+            render_collapsed = {collapsed}
+        """
+        )
+        testdir.makepyfile("def test_fail(): assert False")
+        result, html = run(testdir)
+        assert result.ret == 1
+        assert expected_html in html
+        assert_results(html, tests=1, passed=0, failed=1)