remove tests.util.write_file duplicated implementation.

tests/test_config.py

@@ -11,7 +11,7 @@
 """
 import sys
 
-from util import TestApp, with_app, with_tempdir, raises, raises_msg, write_file
+from util import TestApp, with_app, with_tempdir, raises, raises_msg
 
 from sphinx.config import Config
 from sphinx.errors import ExtensionError, ConfigError, VersionRequirementError
@@ -87,12 +87,13 @@ def test_extension_values(app):
 @with_tempdir
 def test_errors_warnings(dir):
     # test the error for syntax errors in the config file
-    write_file(dir / 'conf.py', u'project = \n', 'ascii')
+    (dir / 'conf.py').write_text(u'project = \n', encoding='ascii')
     raises_msg(ConfigError, 'conf.py', Config, dir, 'conf.py', {}, None)
 
     # test the automatic conversion of 2.x only code in configs
-    write_file(dir / 'conf.py', u'# -*- coding: utf-8\n\n'
-               u'project = u"Jägermeister"\n', 'utf-8')
+    (dir / 'conf.py').write_text(
+        u'# -*- coding: utf-8\n\nproject = u"Jägermeister"\n',
+        encoding='utf-8')
     cfg = Config(dir, 'conf.py', {}, None)
     cfg.init_values(lambda warning: 1/0)
     assert cfg.project == u'Jägermeister'
@@ -102,8 +103,8 @@ def test_errors_warnings(dir):
     # skip the test there
     if sys.version_info >= (3, 0):
         return
-    write_file(dir / 'conf.py', u'# -*- coding: latin-1\nproject = "fooä"\n',
-            'latin-1')
+    (dir / 'conf.py').write_text(
+        u'# -*- coding: latin-1\nproject = "fooä"\n', encoding='latin-1')
     cfg = Config(dir, 'conf.py', {}, None)
     warned = [False]
     def warn(msg):

tests/test_intersphinx.py

@@ -22,7 +22,7 @@ from sphinx import addnodes
 from sphinx.ext.intersphinx import read_inventory_v1, read_inventory_v2, \
      load_mappings, missing_reference
 
-from util import with_app, with_tempdir, write_file
+from util import with_app, with_tempdir
 
 
 inventory_v1 = '''\
@@ -85,7 +85,7 @@ def test_read_inventory_v2():
 @with_tempdir
 def test_missing_reference(tempdir, app):
     inv_file = tempdir / 'inventory'
-    write_file(inv_file, inventory_v2)
+    inv_file.write_bytes(inventory_v2)
     app.config.intersphinx_mapping = {
         'http://docs.python.org/': inv_file,
         'py3k': ('http://docs.python.org/py3k/', inv_file),
@@ -165,7 +165,7 @@ def test_load_mappings_warnings(tempdir, app):
     identifiers are not alphanumeric
     """
     inv_file = tempdir / 'inventory'
-    write_file(inv_file, inventory_v2)
+    inv_file.write_bytes(inventory_v2)
     app.config.intersphinx_mapping = {
         'http://docs.python.org/': inv_file,
         'py3k': ('http://docs.python.org/py3k/', inv_file),

tests/util.py

@@ -12,7 +12,6 @@ import StringIO
 import tempfile
 import shutil
 import re
-from codecs import open
 from functools import wraps
 
 from sphinx import application
@@ -28,7 +27,7 @@ __all__ = [
     'test_root', 'test_roots', 'raises', 'raises_msg',
     'skip_if', 'skip_unless', 'skip_unless_importable', 'Struct',
     'ListOutput', 'TestApp', 'with_app', 'gen_with_app',
-    'path', 'with_tempdir', 'write_file',
+    'path', 'with_tempdir',
     'sprint', 'remove_unicode_literals',
 ]
 
@@ -224,18 +223,6 @@ def with_tempdir(func):
     return new_func
 
 
-def write_file(name, contents, encoding=None):
-    if encoding is None:
-        mode = 'wb'
-        if isinstance(contents, unicode):
-            contents = contents.encode('ascii')
-    else:
-        mode = 'w'
-    f = open(str(name), mode, encoding=encoding)
-    f.write(contents)
-    f.close()
-
-
 def sprint(*args):
     sys.stderr.write(' '.join(map(str, args)) + '\n')