зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
3.3 KiB
Python
88 строки
3.3 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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from __future__ import absolute_import
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import os
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from mozunit import main, MockedOpen
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import unittest
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from tempfile import mkstemp
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class TestMozUnit(unittest.TestCase):
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def test_mocked_open(self):
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# Create a temporary file on the file system.
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(fd, path) = mkstemp()
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with os.fdopen(fd, "w") as file:
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file.write("foobar")
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self.assertFalse(os.path.exists("file1"))
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self.assertFalse(os.path.exists("file2"))
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with MockedOpen({"file1": "content1", "file2": "content2"}):
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self.assertTrue(os.path.exists("file1"))
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self.assertTrue(os.path.exists("file2"))
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self.assertFalse(os.path.exists("foo/file1"))
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# Check the contents of the files given at MockedOpen creation.
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self.assertEqual(open("file1", "r").read(), "content1")
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self.assertEqual(open("file2", "r").read(), "content2")
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# Check that overwriting these files alters their content.
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with open("file1", "w") as file:
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file.write("foo")
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self.assertTrue(os.path.exists("file1"))
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self.assertEqual(open("file1", "r").read(), "foo")
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# ... but not until the file is closed.
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file = open("file2", "w")
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file.write("bar")
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self.assertEqual(open("file2", "r").read(), "content2")
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file.close()
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self.assertEqual(open("file2", "r").read(), "bar")
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# Check that appending to a file does append
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with open("file1", "a") as file:
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file.write("bar")
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self.assertEqual(open("file1", "r").read(), "foobar")
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self.assertFalse(os.path.exists("file3"))
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# Opening a non-existing file ought to fail.
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self.assertRaises(IOError, open, "file3", "r")
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self.assertFalse(os.path.exists("file3"))
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# Check that writing a new file does create the file.
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with open("file3", "w") as file:
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file.write("baz")
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self.assertEqual(open("file3", "r").read(), "baz")
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self.assertTrue(os.path.exists("file3"))
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# Check the content of the file created outside MockedOpen.
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self.assertEqual(open(path, "r").read(), "foobar")
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# Check that overwriting a file existing on the file system
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# does modify its content.
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with open(path, "w") as file:
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file.write("bazqux")
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self.assertEqual(open(path, "r").read(), "bazqux")
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with MockedOpen():
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# Check that appending to a file existing on the file system
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# does modify its content.
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with open(path, "a") as file:
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file.write("bazqux")
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self.assertEqual(open(path, "r").read(), "foobarbazqux")
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# Check that the file was not actually modified on the file system.
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self.assertEqual(open(path, "r").read(), "foobar")
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os.remove(path)
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# Check that the file created inside MockedOpen wasn't actually
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# created.
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self.assertRaises(IOError, open, "file3", "r")
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if __name__ == "__main__":
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main()
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