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# distbuild/stringbuffer_tests.py -- unit tests
#
# Copyright 2012 Codethink Limited
# All rights reserved.
import unittest
import distbuild
class StringBufferTests(unittest.TestCase):
def setUp(self):
self.buf = distbuild.StringBuffer()
def test_is_empty_initially(self):
self.assertEqual(self.buf.peek(), '')
self.assertEqual(len(self.buf), 0)
def test_adds_a_string(self):
s = 'foo'
self.buf.add(s)
self.assertEqual(self.buf.peek(), s)
self.assertEqual(len(self.buf), len(s))
def test_adds_a_second_string(self):
s = 'foo'
t = 'bar'
self.buf.add(s)
self.buf.add(t)
self.assertEqual(self.buf.peek(), s + t)
self.assertEqual(len(self.buf), len(s + t))
class StringBufferRemoveTests(unittest.TestCase):
def setUp(self):
self.buf = distbuild.StringBuffer()
self.first = 'foo'
self.second = 'bar'
self.all = self.first + self.second
self.buf.add(self.first)
self.buf.add(self.second)
def test_removes_part_of_first_string(self):
self.assertTrue(len(self.first) > 1)
self.buf.remove(1)
self.assertEqual(self.buf.peek(), self.all[1:])
self.assertEqual(len(self.buf), len(self.all) - 1)
def test_removes_all_of_first_string(self):
self.buf.remove(len(self.first))
self.assertEqual(self.buf.peek(), self.second)
self.assertEqual(len(self.buf), len(self.second))
def test_removes_more_than_first_string(self):
self.assertTrue(len(self.first) > 1)
self.assertTrue(len(self.second) > 1)
self.buf.remove(len(self.first) + 1)
self.assertEqual(self.buf.peek(), self.second[1:])
self.assertEqual(len(self.buf), len(self.second) - 1)
def test_removes_all_strings(self):
self.buf.remove(len(self.all))
self.assertEqual(self.buf.peek(), '')
self.assertEqual(len(self.buf), 0)
def test_removes_more_than_all_strings(self):
self.buf.remove(len(self.all) + 1)
self.assertEqual(self.buf.peek(), '')
self.assertEqual(len(self.buf), 0)
class StringBufferReadTests(unittest.TestCase):
def setUp(self):
self.buf = distbuild.StringBuffer()
def test_returns_empty_string_for_empty_buffer(self):
self.assertEqual(self.buf.read(100), '')
self.assertEqual(self.buf.peek(), '')
def test_returns_partial_string_for_short_buffer(self):
self.buf.add('foo')
self.assertEqual(self.buf.read(100), 'foo')
self.assertEqual(self.buf.peek(), 'foo')
def test_returns_catenated_strings(self):
self.buf.add('foo')
self.buf.add('bar')
self.assertEqual(self.buf.read(100), 'foobar')
self.assertEqual(self.buf.peek(), 'foobar')
def test_returns_requested_amount_when_available(self):
self.buf.add('foo')
self.buf.add('bar')
self.assertEqual(self.buf.read(4), 'foob')
self.assertEqual(self.buf.peek(), 'foobar')
class StringBufferReadlineTests(unittest.TestCase):
def setUp(self):
self.buf = distbuild.StringBuffer()
def test_returns_None_on_empty_buffer(self):
self.assertEqual(self.buf.readline(), None)
def test_returns_None_on_incomplete_line_in_buffer(self):
self.buf.add('foo')
self.assertEqual(self.buf.readline(), None)
def test_extracts_complete_line(self):
self.buf.add('foo\n')
self.assertEqual(self.buf.readline(), 'foo\n')
self.assertEqual(self.buf.peek(), '')
def test_extracts_only_the_initial_line_and_leaves_rest_of_buffer(self):
self.buf.add('foo\nbar\n')
self.assertEqual(self.buf.readline(), 'foo\n')
self.assertEqual(self.buf.peek(), 'bar\n')
def test_extracts_only_the_initial_line_and_leaves_partial_line(self):
self.buf.add('foo\nbar')
self.assertEqual(self.buf.readline(), 'foo\n')
self.assertEqual(self.buf.peek(), 'bar')
def test_extracts_only_the_initial_line_from_multiple_pieces(self):
self.buf.add('foo\n')
self.buf.add('bar\n')
self.assertEqual(self.buf.readline(), 'foo\n')
self.assertEqual(self.buf.peek(), 'bar\n')
def test_extracts_only_the_initial_line_from_multiple_pieces_incomp(self):
self.buf.add('foo\n')
self.buf.add('bar')
self.assertEqual(self.buf.readline(), 'foo\n')
self.assertEqual(self.buf.peek(), 'bar')
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