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#!/usr/bin/python
# Copyright (C) 2010 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Unit tests for metered_stream.py."""
import os
import optparse
import pdb
import sys
import unittest
import logging
from webkitpy.common.array_stream import ArrayStream
from webkitpy.layout_tests.layout_package import metered_stream
class TestMeteredStream(unittest.TestCase):
def test_regular(self):
a = ArrayStream()
m = metered_stream.MeteredStream(verbose=False, stream=a)
self.assertTrue(a.empty())
# basic test - note that the flush() is a no-op, but we include it
# for coverage.
m.write("foo")
m.flush()
exp = ['foo']
self.assertEquals(a.get(), exp)
# now check that a second write() does not overwrite the first.
m.write("bar")
exp.append('bar')
self.assertEquals(a.get(), exp)
m.update("batter")
exp.append('batter')
self.assertEquals(a.get(), exp)
# The next update() should overwrite the laste update() but not the
# other text. Note that the cursor is effectively positioned at the
# end of 'foo', even though we had to erase three more characters.
m.update("foo")
exp.append('\b\b\b\b\b\b \b\b\b\b\b\b')
exp.append('foo')
self.assertEquals(a.get(), exp)
m.progress("progress")
exp.append('\b\b\b \b\b\b')
exp.append('progress')
self.assertEquals(a.get(), exp)
# now check that a write() does overwrite the progress bar
m.write("foo")
exp.append('\b\b\b\b\b\b\b\b \b\b\b\b\b\b\b\b')
exp.append('foo')
self.assertEquals(a.get(), exp)
# Now test that we only back up to the most recent newline.
# Note also that we do not back up to erase the most recent write(),
# i.e., write()s do not get erased.
a.reset()
m.update("foo\nbar")
m.update("baz")
self.assertEquals(a.get(), ['foo\nbar', '\b\b\b \b\b\b', 'baz'])
def test_verbose(self):
a = ArrayStream()
m = metered_stream.MeteredStream(verbose=True, stream=a)
self.assertTrue(a.empty())
m.write("foo")
self.assertEquals(a.get(), ['foo'])
m.update("bar")
# FIXME: figure out how to test that this went to the logger. Is this
# good enough?
self.assertEquals(a.get(), ['foo'])
m.progress("dropped")
self.assertEquals(a.get(), ['foo'])
if __name__ == '__main__':
unittest.main()
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