Issue 7490: make IGNORE_EXCEPTION_DETAIL also ignore details of the module containing the exception under test (original patch by Lennart Regebro)
diff --git a/Doc/library/doctest.rst b/Doc/library/doctest.rst
index de9340c..6ffd2ab 100644
--- a/Doc/library/doctest.rst
+++ b/Doc/library/doctest.rst
@@ -338,7 +338,7 @@
blank line, put ``<BLANKLINE>`` in your doctest example each place a blank line
is expected.
- .. versionchanged:: 2.4
+ .. versionadded:: 2.4
``<BLANKLINE>`` was added; there was no way to use expected output containing
empty lines in previous versions.
@@ -438,6 +438,9 @@
The last three lines (starting with :exc:`ValueError`) are compared against the
exception's type and detail, and the rest are ignored.
+.. versionchanged:: 2.4
+ Previous versions were unable to handle multi-line exception details.
+
Best practice is to omit the traceback stack, unless it adds significant
documentation value to the example. So the last example is probably better as::
@@ -469,8 +472,9 @@
with an alphanumeric is taken to be the start of the exception detail. Of
course this does the right thing for genuine tracebacks.
-* When the :const:`IGNORE_EXCEPTION_DETAIL` doctest option is is specified,
- everything following the leftmost colon is ignored.
+* When the :const:`IGNORE_EXCEPTION_DETAIL` doctest option is specified,
+ everything following the leftmost colon and any module information in the
+ exception name is ignored.
* The interactive shell omits the traceback header line for some
:exc:`SyntaxError`\ s. But doctest uses the traceback header line to
@@ -498,10 +502,6 @@
^
SyntaxError: invalid syntax
-.. versionchanged:: 2.4
- The ability to handle a multi-line exception detail, and the
- :const:`IGNORE_EXCEPTION_DETAIL` doctest option, were added.
-
.. _doctest-options:
@@ -564,20 +564,38 @@
exception raised is ``ValueError: 3*14``, but will fail, e.g., if
:exc:`TypeError` is raised.
- Note that a similar effect can be obtained using :const:`ELLIPSIS`, and
- :const:`IGNORE_EXCEPTION_DETAIL` may go away when Python releases prior to 2.4
- become uninteresting. Until then, :const:`IGNORE_EXCEPTION_DETAIL` is the only
- clear way to write a doctest that doesn't care about the exception detail yet
- continues to pass under Python releases prior to 2.4 (doctest directives appear
- to be comments to them). For example, ::
+ It will also ignore the module name used in Python 3 doctest reports. Hence
+ both these variations will work regardless of whether the test is run under
+ Python 2.7 or Python 3.2 (or later versions):
+
+ >>> raise ValueError('message') #doctest: +IGNORE_EXCEPTION_DETAIL
+ Traceback (most recent call last):
+ ValueError: message
+
+ >>> raise ValueError('message') #doctest: +IGNORE_EXCEPTION_DETAIL
+ Traceback (most recent call last):
+ builtin.ValueError: message
+
+ Note that :const:`ELLIPSIS` can also be used to ignore the
+ details of the exception message, but such a test may still fail based
+ on whether or not the module details are printed as part of the
+ exception name. Using :const:`IGNORE_EXCEPTION_DETAIL` and the details
+ from Python 2.3 is also the only clear way to write a doctest that doesn't
+ care about the exception detail yet continues to pass under Python 2.3 or
+ earlier (those releases do not support doctest directives and ignore them
+ as irrelevant comments). For example, ::
>>> (1, 2)[3] = 'moo' #doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: object doesn't support item assignment
- passes under Python 2.4 and Python 2.3. The detail changed in 2.4, to say "does
- not" instead of "doesn't".
+ passes under Python 2.3 and later Python versions, even though the detail
+ changed in Python 2.4 to say "does not" instead of "doesn't".
+
+ .. versionchanged:: 2.7
+ :const:`IGNORE_EXCEPTION_DETAIL` now also ignores any information
+ relating to the module containing the exception under test
.. data:: SKIP
@@ -590,6 +608,8 @@
The SKIP flag can also be used for temporarily "commenting out" examples.
+.. versionadded:: 2.5
+
.. data:: COMPARISON_FLAGS
@@ -692,17 +712,13 @@
functions that run doctests, establishing different defaults. In such cases,
disabling an option via ``-`` in a directive can be useful.
-.. versionchanged:: 2.4
- Constants :const:`DONT_ACCEPT_BLANKLINE`, :const:`NORMALIZE_WHITESPACE`,
+.. versionadded:: 2.4
+ Doctest directives and the associated constants
+ :const:`DONT_ACCEPT_BLANKLINE`, :const:`NORMALIZE_WHITESPACE`,
:const:`ELLIPSIS`, :const:`IGNORE_EXCEPTION_DETAIL`, :const:`REPORT_UDIFF`,
:const:`REPORT_CDIFF`, :const:`REPORT_NDIFF`,
:const:`REPORT_ONLY_FIRST_FAILURE`, :const:`COMPARISON_FLAGS` and
- :const:`REPORTING_FLAGS` were added; by default ``<BLANKLINE>`` in expected
- output matches an empty line in actual output; and doctest directives were
- added.
-
-.. versionchanged:: 2.5
- Constant :const:`SKIP` was added.
+ :const:`REPORTING_FLAGS` were added.
There's also a way to register new option flag names, although this isn't useful
unless you intend to extend :mod:`doctest` internals via subclassing: