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130 lines
4.4 KiB
Python
130 lines
4.4 KiB
Python
#!/usr/bin/env python
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###
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# Copyright (c) 2002, Jeremiah Fincher
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions, and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions, and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the author of this software nor the name of
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# contributors to this software may be used to endorse or promote products
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# derived from this software without specific prior written consent.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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###
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from test import *
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from structures import *
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class RingBufferTestCase(unittest.TestCase):
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def testInit(self):
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self.assertRaises(ValueError, RingBuffer, -1)
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self.assertRaises(ValueError, RingBuffer, 0)
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self.assertEqual(range(10), list(RingBuffer(10, range(10))))
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def testLen(self):
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b = RingBuffer(3)
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self.assertEqual(0, len(b))
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b.append(1)
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self.assertEqual(1, len(b))
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b.append(2)
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self.assertEqual(2, len(b))
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b.append(3)
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self.assertEqual(3, len(b))
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b.append(4)
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self.assertEqual(3, len(b))
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b.append(5)
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self.assertEqual(3, len(b))
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def testNonzero(self):
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b = RingBuffer(3)
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self.failIf(b)
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b.append(1)
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self.failUnless(b)
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def testAppend(self):
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b = RingBuffer(3)
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self.assertEqual([], list(b))
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b.append(1)
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self.assertEqual([1], list(b))
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b.append(2)
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self.assertEqual([1, 2], list(b))
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b.append(3)
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self.assertEqual([1, 2, 3], list(b))
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b.append(4)
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self.assertEqual([2, 3, 4], list(b))
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b.append(5)
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self.assertEqual([3, 4, 5], list(b))
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b.append(6)
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self.assertEqual([4, 5, 6], list(b))
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def testContains(self):
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b = RingBuffer(3, range(3))
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self.failUnless(0 in b)
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self.failUnless(1 in b)
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self.failUnless(2 in b)
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self.failIf(3 in b)
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def testGetitem(self):
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L = range(10)
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b = RingBuffer(len(L), L)
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for i in range(len(b)):
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self.assertEqual(L[i], b[i])
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for i in range(len(b)):
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b.append(i)
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for i in range(len(b)):
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self.assertEqual(L[i], b[i])
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def testSetitem(self):
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L = range(10)
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b = RingBuffer(len(L), [0]*len(L))
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for i in range(len(b)):
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b[i] = i
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for i in range(len(b)):
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self.assertEqual(b[i], i)
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for i in range(len(b)):
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b.append(0)
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for i in range(len(b)):
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b[i] = i
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for i in range(len(b)):
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self.assertEqual(b[i], i)
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def testExtend(self):
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b = RingBuffer(3, range(3))
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self.assertEqual(list(b), range(3))
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b.extend(range(6))
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self.assertEqual(list(b), range(6)[3:])
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def testRepr(self):
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b = RingBuffer(3)
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self.assertEqual(repr(b), 'RingBuffer(3, [])')
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b.append(1)
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self.assertEqual(repr(b), 'RingBuffer(3, [1])')
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b.append(2)
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self.assertEqual(repr(b), 'RingBuffer(3, [1, 2])')
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b.append(3)
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self.assertEqual(repr(b), 'RingBuffer(3, [1, 2, 3])')
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b.append(4)
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self.assertEqual(repr(b), 'RingBuffer(3, [2, 3, 4])')
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b.append(5)
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self.assertEqual(repr(b), 'RingBuffer(3, [3, 4, 5])')
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b.append(6)
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self.assertEqual(repr(b), 'RingBuffer(3, [4, 5, 6])')
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