Allow for report duration formatting (#380)

* first attempt at a working solution

* final solution, no tests

* Update README.rst

Add documentation on how to provide a custom display value for duration formatters

* temp

* finalize the change

* undo test report changes

* fixup tests

* Clarify default duration column data formatting

* fix failing tests

Co-authored-by: Sorin Sbarnea <ssbarnea@redhat.com>

Author: gnikonorov

CHANGES.rst

@@ -1,6 +1,12 @@
 Release Notes
 -------------
 
+**3.1.0 (unreleased)**
+
+* Allow for report duration formatting (`#376 <https://github.com/pytest-dev/pytest-html/issues/376>`_)
+
+  * Thanks to `@brettnolan <https://github.com/brettnolan>`_ for reporting and `@gnikonorov <https://github.com/gnikonorov>`_ for the fix
+
 **3.0.0 (2020-10-28)**
 
 * Respect ``--capture=no``, ``--show-capture=no``, and ``-s`` pytest flags (`#171 <https://github.com/pytest-dev/pytest-html/issues/171>`_)

README.rst

@@ -284,6 +284,26 @@ or by setting the :code:`render_collapsed` in a configuration file (pytest.ini,
 
 **NOTE:** Setting :code:`render_collapsed` will, unlike the query parameter, affect all statuses.
 
+The formatting of the timestamp used in the :code:`Durations` column can be modified by setting :code:`duration_formatter`
+on the :code:`report` attribute. All `time.strftime`_ formatting directives are supported. In addition, it is possible
+to supply :code:`%f` to get duration milliseconds. If this value is not set, the values in the :code:`Durations` column are
+displayed in :code:`%S.%f` format where :code:`%S` is the total number of seconds a test ran for.
+
+Below is an example of a :code:`conftest.py` file setting :code:`duration_formatter`:
+
+.. code-block:: python
+
+   import pytest
+
+
+   @pytest.hookimpl(hookwrapper=True)
+   def pytest_runtest_makereport(item, call):
+       outcome = yield
+       report = outcome.get_result()
+       setattr(report, "duration_formatter", "%H:%M:%S.%f")
+
+**NOTE**: Milliseconds are always displayed with a precision of 2
+
 Screenshots
 -----------
 
@@ -305,4 +325,6 @@ Resources
 - `Issue Tracker <http://github.com/pytest-dev/pytest-html/issues>`_
 - `Code <http://github.com/pytest-dev/pytest-html/>`_
 
+
 .. _JSON: http://json.org/
+.. _time.strftime: https://docs.python.org/3/library/time.html#time.strftime

pytest_html/plugin.py

@@ -157,6 +157,7 @@ def __init__(self, outcome, report, logfile, config):
             if getattr(report, "when", "call") != "call":
                 self.test_id = "::".join([report.nodeid, report.when])
             self.time = getattr(report, "duration", 0.0)
+            self.formatted_time = getattr(report, "formatted_duration", 0.0)
             self.outcome = outcome
             self.additional_html = []
             self.links_html = []
@@ -183,7 +184,7 @@ def __init__(self, outcome, report, logfile, config):
             cells = [
                 html.td(self.outcome, class_="col-result"),
                 html.td(self.test_id, class_="col-name"),
-                html.td(f"{self.time:.2f}", class_="col-duration"),
+                html.td(self.formatted_time, class_="col-duration"),
                 html.td(self.links_html, class_="col-links"),
             ]
 
@@ -537,7 +538,7 @@ def generate_summary_item(self):
         cells = [
             html.th("Result", class_="sortable result initial-sort", col="result"),
             html.th("Test", class_="sortable", col="name"),
-            html.th("Duration", class_="sortable numeric", col="duration"),
+            html.th("Duration", class_="sortable", col="duration"),
             html.th("Links", class_="sortable links", col="links"),
         ]
         session.config.hook.pytest_html_results_table_header(cells=cells)
@@ -603,6 +604,32 @@ def generate_summary_item(self):
         unicode_doc = unicode_doc.encode("utf-8", errors="xmlcharrefreplace")
         return unicode_doc.decode("utf-8")
 
+    def _format_duration(self, report):
+        # parse the report duration into its display version and return it to the caller
+        duration_formatter = getattr(report, "duration_formatter", None)
+        string_duration = str(report.duration)
+        if duration_formatter is None:
+            if "." in string_duration:
+                split_duration = string_duration.split(".")
+                split_duration[1] = split_duration[1][0:2]
+
+                string_duration = ".".join(split_duration)
+
+            return string_duration
+        else:
+            # support %f, since time.strftime doesn't support it out of the box
+            # keep a precision of 2 for legacy reasons
+            formatted_milliseconds = "00"
+            if "." in string_duration:
+                milliseconds = string_duration.split(".")[1]
+                formatted_milliseconds = milliseconds[0:2]
+
+            duration_formatter = duration_formatter.replace(
+                "%f", formatted_milliseconds
+            )
+            duration_as_gmtime = time.gmtime(report.duration)
+            return time.strftime(duration_formatter, duration_as_gmtime)
+
     def _generate_environment(self, config):
         if not hasattr(config, "_metadata") or config._metadata is None:
             return []
@@ -688,6 +715,7 @@ def _post_process_reports(self):
             test_report.longrepr = full_text
             test_report.extra = extras
             test_report.duration = duration
+            test_report.formatted_duration = self._format_duration(test_report)
 
             if wasxfail:
                 test_report.wasxfail = True

pytest_html/resources/main.js

@@ -28,9 +28,7 @@ function sort_column(elem) {
     toggle_sort_states(elem);
     const colIndex = toArray(elem.parentNode.childNodes).indexOf(elem);
     let key;
-    if (elem.classList.contains('numeric')) {
-        key = key_num;
-    } else if (elem.classList.contains('result')) {
+    if (elem.classList.contains('result')) {
         key = key_result;
     } else if (elem.classList.contains('links')) {
         key = key_link;
@@ -173,12 +171,6 @@ function key_alpha(col_index) {
     };
 }
 
-function key_num(col_index) {
-    return function(elem) {
-        return parseFloat(elem.childNodes[1].childNodes[col_index].firstChild.data);
-    };
-}
-
 function key_link(col_index) {
     return function(elem) {
         const dataCell = elem.childNodes[1].childNodes[col_index].firstChild;

testing/js_test_report.html

@@ -19,7 +19,7 @@
         <tr>
           <th class="sortable result initial-sort" col="result">Result</th>
           <th class="sortable" col="name">Test</th>
-          <th class="sortable numeric" col="duration">Duration</th>
+          <th class="sortable" col="duration">Duration</th>
           <th class="sortable links" col="links">Links</th></tr>
         <tr hidden="true" id="not-found-message">
           <th colspan="5">No results found. Try to check the filters</th>

testing/test.js

@@ -43,7 +43,7 @@
    sort_column_test('[col=name]',
                     'passed results-table-row', 'rerun results-table-row');
 
-   //numeric
+   //duration
    sort_column_test('[col=duration]',
                     'rerun results-table-row', 'passed results-table-row');
    sort_column_test('[col=duration]',

testing/test_pytest_html.py

@@ -115,6 +115,50 @@ def test_sleep():
         m = p.search(html)
         assert float(m.group(1)) >= sleep
 
+    @pytest.mark.parametrize(
+        "duration_formatter,expected_report_content",
+        [
+            ("%f", r'<td class="col-duration">\d{2}</td>'),
+            ("%S.%f", r'<td class="col-duration">\d{2}\.\d{2}</td>'),
+            (
+                "ABC%H  %M %S123",
+                r'<td class="col-duration">ABC\d{2}  \d{2} \d{2}123</td>',
+            ),
+        ],
+    )
+    def test_can_format_duration_column(
+        self, testdir, duration_formatter, expected_report_content
+    ):
+
+        testdir.makeconftest(
+            f"""
+            import pytest
+
+            @pytest.hookimpl(hookwrapper=True)
+            def pytest_runtest_makereport(item, call):
+                outcome = yield
+                report = outcome.get_result()
+                setattr(report, "duration_formatter", "{duration_formatter}")
+        """
+        )
+
+        sleep = float(0.2)
+        testdir.makepyfile(
+            """
+            import time
+            def test_sleep():
+                time.sleep({:f})
+        """.format(
+                sleep
+            )
+        )
+        result, html = run(testdir)
+        assert result.ret == 0
+        assert_results(html, duration=sleep)
+
+        compiled_regex = re.compile(expected_report_content)
+        assert compiled_regex.search(html)
+
     def test_pass(self, testdir):
         testdir.makepyfile("def test_pass(): pass")
         result, html = run(testdir)