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cpython/Lib/test/test_pydoc.py

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import sys
import os
import os.path
import difflib
import subprocess
import re
import pydoc
import inspect
import keyword
import unittest
import xml.etree
import test.test_support
from contextlib import contextmanager
from collections import namedtuple
from test.test_support import (
TESTFN, forget, rmtree, EnvironmentVarGuard, reap_children, captured_stdout)
from test import pydoc_mod
expected_text_pattern = \
"""
NAME
test.pydoc_mod - This is a test module for test_pydoc
FILE
%s
%s
CLASSES
__builtin__.object
B
A
\x20\x20\x20\x20
class A
| Hello and goodbye
|\x20\x20
| Methods defined here:
|\x20\x20
| __init__()
| Wow, I have no function!
\x20\x20\x20\x20
class B(__builtin__.object)
| Data descriptors defined here:
|\x20\x20
| __dict__
| dictionary for instance variables (if defined)
|\x20\x20
| __weakref__
| list of weak references to the object (if defined)
|\x20\x20
| ----------------------------------------------------------------------
| Data and other attributes defined here:
|\x20\x20
| NO_MEANING = 'eggs'
FUNCTIONS
doc_func()
This function solves all of the world's problems:
hunger
lack of Python
war
\x20\x20\x20\x20
nodoc_func()
DATA
__author__ = 'Benjamin Peterson'
__credits__ = 'Nobody'
__version__ = '1.2.3.4'
VERSION
1.2.3.4
AUTHOR
Benjamin Peterson
CREDITS
Nobody
""".strip()
expected_html_pattern = \
"""
<table width="100%%" cellspacing=0 cellpadding=2 border=0 summary="heading">
<tr bgcolor="#7799ee">
<td valign=bottom>&nbsp;<br>
<font color="#ffffff" face="helvetica, arial">&nbsp;<br><big><big><strong><a href="test.html"><font color="#ffffff">test</font></a>.pydoc_mod</strong></big></big> (version 1.2.3.4)</font></td
><td align=right valign=bottom
><font color="#ffffff" face="helvetica, arial"><a href=".">index</a><br><a href="file:%s">%s</a>%s</font></td></tr></table>
<p><tt>This&nbsp;is&nbsp;a&nbsp;test&nbsp;module&nbsp;for&nbsp;test_pydoc</tt></p>
<p>
<table width="100%%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ee77aa">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Classes</strong></big></font></td></tr>
\x20\x20\x20\x20
<tr><td bgcolor="#ee77aa"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
<td width="100%%"><dl>
<dt><font face="helvetica, arial"><a href="__builtin__.html#object">__builtin__.object</a>
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="test.pydoc_mod.html#B">B</a>
</font></dt></dl>
</dd>
<dt><font face="helvetica, arial"><a href="test.pydoc_mod.html#A">A</a>
</font></dt></dl>
<p>
<table width="100%%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#000000" face="helvetica, arial"><a name="A">class <strong>A</strong></a></font></td></tr>
\x20\x20\x20\x20
<tr bgcolor="#ffc8d8"><td rowspan=2><tt>&nbsp;&nbsp;&nbsp;</tt></td>
<td colspan=2><tt>Hello&nbsp;and&nbsp;goodbye<br>&nbsp;</tt></td></tr>
<tr><td>&nbsp;</td>
<td width="100%%">Methods defined here:<br>
<dl><dt><a name="A-__init__"><strong>__init__</strong></a>()</dt><dd><tt>Wow,&nbsp;I&nbsp;have&nbsp;no&nbsp;function!</tt></dd></dl>
</td></tr></table> <p>
<table width="100%%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#000000" face="helvetica, arial"><a name="B">class <strong>B</strong></a>(<a href="__builtin__.html#object">__builtin__.object</a>)</font></td></tr>
\x20\x20\x20\x20
<tr><td bgcolor="#ffc8d8"><tt>&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
<td width="100%%">Data descriptors defined here:<br>
<dl><dt><strong>__dict__</strong></dt>
<dd><tt>dictionary&nbsp;for&nbsp;instance&nbsp;variables&nbsp;(if&nbsp;defined)</tt></dd>
</dl>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list&nbsp;of&nbsp;weak&nbsp;references&nbsp;to&nbsp;the&nbsp;object&nbsp;(if&nbsp;defined)</tt></dd>
</dl>
<hr>
Data and other attributes defined here:<br>
<dl><dt><strong>NO_MEANING</strong> = 'eggs'</dl>
</td></tr></table></td></tr></table><p>
<table width="100%%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#eeaa77">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Functions</strong></big></font></td></tr>
\x20\x20\x20\x20
<tr><td bgcolor="#eeaa77"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
<td width="100%%"><dl><dt><a name="-doc_func"><strong>doc_func</strong></a>()</dt><dd><tt>This&nbsp;function&nbsp;solves&nbsp;all&nbsp;of&nbsp;the&nbsp;world's&nbsp;problems:<br>
hunger<br>
lack&nbsp;of&nbsp;Python<br>
war</tt></dd></dl>
<dl><dt><a name="-nodoc_func"><strong>nodoc_func</strong></a>()</dt></dl>
</td></tr></table><p>
<table width="100%%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#55aa55">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Data</strong></big></font></td></tr>
\x20\x20\x20\x20
<tr><td bgcolor="#55aa55"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
<td width="100%%"><strong>__author__</strong> = 'Benjamin Peterson'<br>
<strong>__credits__</strong> = 'Nobody'<br>
<strong>__version__</strong> = '1.2.3.4'</td></tr></table><p>
<table width="100%%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#7799ee">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Author</strong></big></font></td></tr>
\x20\x20\x20\x20
<tr><td bgcolor="#7799ee"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
<td width="100%%">Benjamin&nbsp;Peterson</td></tr></table><p>
<table width="100%%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#7799ee">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Credits</strong></big></font></td></tr>
\x20\x20\x20\x20
<tr><td bgcolor="#7799ee"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
<td width="100%%">Nobody</td></tr></table>
""".strip()
# output pattern for missing module
missing_pattern = "no Python documentation found for '%s'"
# output pattern for module with bad imports
badimport_pattern = "problem in %s - <type 'exceptions.ImportError'>: No module named %s"
def run_pydoc(module_name, *args):
"""
Runs pydoc on the specified module. Returns the stripped
output of pydoc.
"""
cmd = [sys.executable, pydoc.__file__, " ".join(args), module_name]
try:
output = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()[0]
return output.strip()
finally:
reap_children()
def get_pydoc_html(module):
"Returns pydoc generated output as html"
doc = pydoc.HTMLDoc()
output = doc.docmodule(module)
loc = doc.getdocloc(pydoc_mod) or ""
if loc:
loc = "<br><a href=\"" + loc + "\">Module Docs</a>"
return output.strip(), loc
def get_pydoc_text(module):
"Returns pydoc generated output as text"
doc = pydoc.TextDoc()
loc = doc.getdocloc(pydoc_mod) or ""
if loc:
loc = "\nMODULE DOCS\n " + loc + "\n"
output = doc.docmodule(module)
# cleanup the extra text formatting that pydoc preforms
patt = re.compile('\b.')
output = patt.sub('', output)
return output.strip(), loc
def print_diffs(text1, text2):
"Prints unified diffs for two texts"
lines1 = text1.splitlines(True)
lines2 = text2.splitlines(True)
diffs = difflib.unified_diff(lines1, lines2, n=0, fromfile='expected',
tofile='got')
print '\n' + ''.join(diffs)
class PyDocDocTest(unittest.TestCase):
@unittest.skipIf(sys.flags.optimize >= 2,
"Docstrings are omitted with -O2 and above")
def test_html_doc(self):
result, doc_loc = get_pydoc_html(pydoc_mod)
mod_file = inspect.getabsfile(pydoc_mod)
if sys.platform == 'win32':
import nturl2path
mod_url = nturl2path.pathname2url(mod_file)
else:
mod_url = mod_file
expected_html = expected_html_pattern % (mod_url, mod_file, doc_loc)
if result != expected_html:
print_diffs(expected_html, result)
self.fail("outputs are not equal, see diff above")
@unittest.skipIf(sys.flags.optimize >= 2,
"Docstrings are omitted with -O2 and above")
def test_text_doc(self):
result, doc_loc = get_pydoc_text(pydoc_mod)
expected_text = expected_text_pattern % \
(inspect.getabsfile(pydoc_mod), doc_loc)
if result != expected_text:
print_diffs(expected_text, result)
self.fail("outputs are not equal, see diff above")
def test_issue8225(self):
# Test issue8225 to ensure no doc link appears for xml.etree
result, doc_loc = get_pydoc_text(xml.etree)
self.assertEqual(doc_loc, "", "MODULE DOCS incorrectly includes a link")
def test_not_here(self):
missing_module = "test.i_am_not_here"
result = run_pydoc(missing_module)
expected = missing_pattern % missing_module
self.assertEqual(expected, result,
"documentation for missing module found")
def test_badimport(self):
# This tests the fix for issue 5230, where if pydoc found the module
# but the module had an internal import error pydoc would report no doc
# found.
modname = 'testmod_xyzzy'
testpairs = (
('i_am_not_here', 'i_am_not_here'),
('test.i_am_not_here_either', 'i_am_not_here_either'),
('test.i_am_not_here.neither_am_i', 'i_am_not_here.neither_am_i'),
('i_am_not_here.{}'.format(modname), 'i_am_not_here.{}'.format(modname)),
('test.{}'.format(modname), modname),
)
@contextmanager
def newdirinpath(dir):
os.mkdir(dir)
sys.path.insert(0, dir)
yield
sys.path.pop(0)
rmtree(dir)
with newdirinpath(TESTFN), EnvironmentVarGuard() as env:
env['PYTHONPATH'] = TESTFN
fullmodname = os.path.join(TESTFN, modname)
sourcefn = fullmodname + os.extsep + "py"
for importstring, expectedinmsg in testpairs:
f = open(sourcefn, 'w')
f.write("import {}\n".format(importstring))
f.close()
try:
result = run_pydoc(modname)
finally:
forget(modname)
expected = badimport_pattern % (modname, expectedinmsg)
self.assertEqual(expected, result)
def test_input_strip(self):
missing_module = " test.i_am_not_here "
result = run_pydoc(missing_module)
expected = missing_pattern % missing_module.strip()
self.assertEqual(expected, result,
"white space was not stripped from module name "
"or other error output mismatch")
def test_stripid(self):
# test with strings, other implementations might have different repr()
stripid = pydoc.stripid
# strip the id
self.assertEqual(stripid('<function stripid at 0x88dcee4>'),
'<function stripid>')
self.assertEqual(stripid('<function stripid at 0x01F65390>'),
'<function stripid>')
# nothing to strip, return the same text
self.assertEqual(stripid('42'), '42')
self.assertEqual(stripid("<type 'exceptions.Exception'>"),
"<type 'exceptions.Exception'>")
class TestDescriptions(unittest.TestCase):
def test_module(self):
# Check that pydocfodder module can be described
from test import pydocfodder
doc = pydoc.render_doc(pydocfodder)
self.assertIn("pydocfodder", doc)
def test_classic_class(self):
class C: "Classic class"
c = C()
self.assertEqual(pydoc.describe(C), 'class C')
self.assertEqual(pydoc.describe(c), 'instance of C')
expected = 'instance of C in module %s' % __name__
self.assertIn(expected, pydoc.render_doc(c))
def test_class(self):
class C(object): "New-style class"
c = C()
self.assertEqual(pydoc.describe(C), 'class C')
self.assertEqual(pydoc.describe(c), 'C')
expected = 'C in module %s object' % __name__
self.assertIn(expected, pydoc.render_doc(c))
def test_namedtuple_public_underscore(self):
NT = namedtuple('NT', ['abc', 'def'], rename=True)
with captured_stdout() as help_io:
help(NT)
helptext = help_io.getvalue()
self.assertIn('_1', helptext)
self.assertIn('_replace', helptext)
self.assertIn('_asdict', helptext)
class TestHelper(unittest.TestCase):
def test_keywords(self):
self.assertEqual(sorted(pydoc.Helper.keywords),
sorted(keyword.kwlist))
def test_main():
test.test_support.run_unittest(PyDocDocTest,
TestDescriptions,
TestHelper)
if __name__ == "__main__":
test_main()
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