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authorTim Peters <tim.peters@gmail.com>2004-09-25 03:02:23 (GMT)
committerTim Peters <tim.peters@gmail.com>2004-09-25 03:02:23 (GMT)
commit8c0a2cf93873740144223c22b7e873862618397c (patch)
tree7da17aaa4239c47cfbaf15c437ea236b434dc86c /Doc
parent48983fc484a94cac36d3bc99556251dca80b2595 (diff)
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Explain the motivation for the unittest functions, and beef up the
example. Squash repeated argument descriptions. Minor rewordings.
Diffstat (limited to 'Doc')
-rw-r--r--Doc/lib/libdoctest.tex100
1 files changed, 49 insertions, 51 deletions
diff --git a/Doc/lib/libdoctest.tex b/Doc/lib/libdoctest.tex
index 3fbe884..346dba3 100644
--- a/Doc/lib/libdoctest.tex
+++ b/Doc/lib/libdoctest.tex
@@ -860,7 +860,7 @@ sections \ref{doctest-simple-testmod} and
passed).
Optional argument \var{optionflags} or's together option flags. See
- see section~\ref{doctest-options}.
+ section~\ref{doctest-options}.
Optional argument \var{raise_on_error} defaults to false. If true,
an exception is raised upon the first failure or unexpected exception
@@ -927,34 +927,46 @@ sections \ref{doctest-simple-testmod} and
\subsection{Unittest API\label{doctest-unittest-api}}
-Doctest provides several functions that can be used to create
-\module{unittest} test suites from doctest examples. These test
-suites can then be run using \module{unittest} test runners:
+As your collection of doctest'ed modules grows, you'll want a way to run
+all their doctests systematically. Prior to Python 2.4, \module{doctest}
+had a barely documented \class{Tester} class that supplied a rudimentary
+way to combine doctests from multiple modules. \class{Tester} was feeble,
+and in practice most serious Python testing frameworks build on the
+\module{unittest} module, which supplies many flexible ways to combine
+tests from multiple sources. So, in Python 2.4, module{doctest}'s
+\class{Tester} class is deprecated, and \module{doctest} provides several
+functions that can be used to create \module{unittest} test suites from
+modules and text files containing doctests. These test suites can then be
+run using \module{unittest} test runners:
\begin{verbatim}
- import unittest
- import doctest
- import my_module_with_doctests
+import unittest
+import doctest
+import my_module_with_doctests, and_another
- suite = doctest.DocTestSuite(my_module_with_doctests)
- runner = unittest.TextTestRunner()
- runner.run(suite)
+suite = unittest.TestSuite()
+for mod in my_module_with_doctests, and_another:
+ suite.addTest(doctest.DocTestSuite(mod))
+runner = unittest.TextTestRunner()
+runner.run(suite)
\end{verbatim}
\begin{funcdesc}{DocFileSuite}{*paths, **kw}
Convert doctest tests from one or more text files to a
\class{\refmodule{unittest}.TestSuite}.
- The returned \class{TestSuite} is to be run by the unittest
+ The returned \class{unittest.TestSuite} is to be run by the unittest
framework and runs the interactive examples in each file. If an
example in any file fails, then the synthesized unit test fails, and
a \exception{failureException} exception is raised showing the
name of the file containing the test and a (sometimes approximate)
line number.
- A number of options may be provided as keyword arguments:
+ Pass one or more paths (as strings) to text files to be examined.
+
+ Options may be provided as keyword arguments:
- The optional argument \var{module_relative} specifies how
+ Optional argument \var{module_relative} specifies how
the the filenames in \var{paths} should be interpreted:
\begin{itemize}
@@ -972,33 +984,33 @@ suites can then be run using \module{unittest} test runners:
current working directory.
\end{itemize}
- The optional argument \var{package} is a Python package or the name
+ Optional argument \var{package} is a Python package or the name
of a Python package whose directory should be used as the base
directory for module-relative filenames. If no package is
specified, then the calling module's directory is used as the base
directory for module-relative filenames. It is an error to specify
\var{package} if \var{module_relative} is \code{False}.
- The optional argument \var{setUp} specifies a set-up function for
+ Optional argument \var{setUp} specifies a set-up function for
the test suite. This is called before running the tests in each
file. The \var{setUp} function will be passed a \class{DocTest}
object. The setUp function can access the test globals as the
\var{globs} attribute of the test passed.
- The optional argument \var{tearDown} specifies a tear-down function
+ Optional argument \var{tearDown} specifies a tear-down function
for the test suite. This is called after running the tests in each
file. The \var{tearDown} function will be passed a \class{DocTest}
object. The setUp function can access the test globals as the
\var{globs} attribute of the test passed.
- The optional argument \var{globs} is a dictionary containing the
+ Optional argument \var{globs} is a dictionary containing the
initial global variables for the tests. A new copy of this
dictionary is created for each test. By default, \var{globs} is
- empty.
+ a new empty dictionary.
- The optional argument \var{optionflags} specifies the default
- doctest options for the tests. It is created by or-ing together
- individual option flags.
+ Optional argument \var{optionflags} specifies the default
+ doctest options for the tests, created by or-ing together
+ individual option flags. See section~\ref{doctest-options}.
\versionadded{2.4}
\end{funcdesc}
@@ -1010,58 +1022,44 @@ suites can then be run using \module{unittest} test runners:
Convert doctest tests for a module to a
\class{\refmodule{unittest}.TestSuite}.
- The returned \class{TestSuite} is to be run by the unittest framework
- and runs each doctest in the module. If any of the doctests fail,
- then the synthesized unit test fails, and a \exception{failureException}
- exception is raised showing the name of the file containing the test and a
- (sometimes approximate) line number.
+ The returned \class{unittest.TestSuite} is to be run by the unittest
+ framework and runs each doctest in the module. If any of the doctests
+ fail, then the synthesized unit test fails, and a
+ \exception{failureException} exception is raised showing the name of the
+ file containing the test and a (sometimes approximate) line number.
- The optional argument \var{module} provides the module to be tested. It
+ Optional argument \var{module} provides the module to be tested. It
can be a module object or a (possibly dotted) module name. If not
specified, the module calling this function is used.
- The optional argument \var{globs} is a dictionary containing the
+ Optional argument \var{globs} is a dictionary containing the
initial global variables for the tests. A new copy of this
dictionary is created for each test. By default, \var{globs} is
- empty.
+ a new empty dictionary.
- The optional argument \var{extraglobs} specifies an extra set of
+ Optional argument \var{extraglobs} specifies an extra set of
global variables, which is merged into \var{globs}. By default, no
extra globals are used.
- The optional argument \var{test_finder} is the \class{DocTestFinder}
+ Optional argument \var{test_finder} is the \class{DocTestFinder}
object (or a drop-in replacement) that is used to extract doctests
from the module.
- The optional argument \var{setUp} specifies a set-up function for
- the test suite. This is called before running the tests in each
- file. The \var{setUp} function will be passed a \class{DocTest}
- object. The setUp function can access the test globals as the
- \var{globs} attribute of the test passed.
-
- The optional argument \var{tearDown} specifies a tear-down function
- for the test suite. This is called after running the tests in each
- file. The \var{tearDown} function will be passed a \class{DocTest}
- object. The setUp function can access the test globals as the
- \var{globs} attribute of the test passed.
-
- The optional argument \var{optionflags} specifies the default
- doctest options for the tests. It is created by or-ing together
- individual option flags.
+ Optional arguments \var{setUp}, \var{tearDown}, and \var{optionflags}
+ are the same as for function \function{DocFileSuite()} above.
\versionadded{2.3}
\versionchanged[The parameters \var{globs}, \var{extraglobs},
\var{test_finder}, \var{setUp}, \var{tearDown}, and
- \var{optionflags} were added]{2.4}
- \versionchanged[This function now uses the same search technique as
- \function{testmod()}.]{2.4}
+ \var{optionflags} were added; this function now uses the same search
+ technique as \function{testmod()}]{2.4}
\end{funcdesc}
\subsection{Advanced API\label{doctest-advanced-api}}
The basic API is a simple wrapper that's intended to make doctest easy
-to use. It is fairly flexible, and should meet most user's needs;
-however, if you require more fine grained control over testing, or
+to use. It is fairly flexible, and should meet most users' needs;
+however, if you require more fine-grained control over testing, or
wish to extend doctest's capabilities, then you should use the
advanced API.