Displaying timezone information in HTML report (#960)

* Displaying timezone information in HTML report

* A helpber to format datetime with local timezone

* No backward compatibility with older python versions

Author: xyb

coverage/backward.py

@@ -9,6 +9,8 @@
 import os
 import sys
 
+from datetime import datetime
+
 from coverage import env
 
 
@@ -217,6 +219,17 @@ def __eq__(self, other):
             return self.__dict__ == other.__dict__
 
 
+def format_local_datetime(dt):
+    """Return a string with local timezone representing the date.
+    If python version is lower than 3.6, the time zone is not included.
+    """
+    try:
+        return dt.astimezone().strftime('%Y-%m-%d %H:%M %z')
+    except (TypeError, ValueError):
+        # Datetime.astimezone in Python 3.5 can not handle naive datetime
+        return dt.strftime('%Y-%m-%d %H:%M')
+
+
 def invalidate_import_caches():
     """Invalidate any import caches that may or may not exist."""
     if importlib and hasattr(importlib, "invalidate_caches"):

coverage/html.py

@@ -11,7 +11,7 @@
 
 import coverage
 from coverage import env
-from coverage.backward import iitems, SimpleNamespace
+from coverage.backward import iitems, SimpleNamespace, format_local_datetime
 from coverage.data import add_data_to_hash
 from coverage.files import flat_rootname
 from coverage.misc import CoverageException, ensure_dir, file_be_gone, Hasher, isolate_module
@@ -200,7 +200,7 @@ def __init__(self, cov):
             '__url__': coverage.__url__,
             '__version__': coverage.__version__,
             'title': title,
-            'time_stamp': datetime.datetime.now().strftime('%Y-%m-%d %H:%M'),
+            'time_stamp': format_local_datetime(datetime.datetime.now()),
             'extra_css': self.extra_css,
             'has_arcs': self.has_arcs,
             'show_contexts': self.config.show_contexts,

tests/gold/html/a/a_py.html

@@ -61,7 +61,7 @@ <h2 class="stats">
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>

tests/gold/html/a/index.html

@@ -76,7 +76,7 @@ <h1>Coverage report:
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>

tests/gold/html/b_branch/b_py.html

@@ -84,7 +84,7 @@ <h2 class="stats">
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>

tests/gold/html/b_branch/index.html

@@ -84,7 +84,7 @@ <h1>Coverage report:
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>

tests/gold/html/bom/2/bom_py.html

@@ -67,7 +67,7 @@ <h2 class="stats">
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:32
+            created at 2019-10-14 09:32 +0000
         </p>
     </div>
 </div>

tests/gold/html/bom/2/index.html

@@ -76,7 +76,7 @@ <h1>Coverage report:
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-13 11:41
+            created at 2019-10-13 11:41 +0000
         </p>
     </div>
 </div>

tests/gold/html/bom/bom_py.html

@@ -67,7 +67,7 @@ <h2 class="stats">
     <div class="content">
         <p>
             <a class="nav" href="index.html">&#xab; index</a> &nbsp; &nbsp; <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>

tests/gold/html/bom/index.html

@@ -76,7 +76,7 @@ <h1>Coverage report:
     <div class="content">
         <p>
             <a class="nav" href="https://coverage.readthedocs.io/en/coverage-5.0a9">coverage.py v5.0a9</a>,
-            created at 2019-10-14 09:27
+            created at 2019-10-14 09:27 +0000
         </p>
     </div>
 </div>