77 lines
2.4 KiB
Python
77 lines
2.4 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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import io
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import sys
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from openstackclient.common import progressbar
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from openstackclient.tests.unit import utils
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class TestProgressBarWrapper(utils.TestCase):
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def test_iter_file_display_progress_bar(self):
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size = 98304
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file_obj = io.StringIO('X' * size)
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saved_stdout = sys.stdout
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try:
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sys.stdout = output = FakeTTYStdout()
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file_obj = progressbar.VerboseFileWrapper(file_obj, size)
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chunksize = 1024
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chunk = file_obj.read(chunksize)
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while chunk:
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chunk = file_obj.read(chunksize)
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self.assertEqual(
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'[%s>] 100%%\n' % ('=' * 29),
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output.getvalue()
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)
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finally:
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sys.stdout = saved_stdout
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def test_iter_file_no_tty(self):
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size = 98304
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file_obj = io.StringIO('X' * size)
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saved_stdout = sys.stdout
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try:
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sys.stdout = output = FakeNoTTYStdout()
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file_obj = progressbar.VerboseFileWrapper(file_obj, size)
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chunksize = 1024
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chunk = file_obj.read(chunksize)
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while chunk:
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chunk = file_obj.read(chunksize)
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# If stdout is not a tty progress bar should do nothing.
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self.assertEqual('', output.getvalue())
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finally:
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sys.stdout = saved_stdout
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class FakeTTYStdout(io.StringIO):
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"""A Fake stdout that try to emulate a TTY device as much as possible."""
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def isatty(self):
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return True
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def write(self, data):
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# When a CR (carriage return) is found reset file.
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if data.startswith('\r'):
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self.seek(0)
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data = data[1:]
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return io.StringIO.write(self, data)
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class FakeNoTTYStdout(FakeTTYStdout):
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"""A Fake stdout that is not a TTY device."""
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def isatty(self):
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return False
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