def test_buffer_set_text():
b = Buffer('foo baz')
b.set_text(0, 3, 0, 3, ' bar')
assert b.get_lines() == ['foo bar baz']
b = Buffer()
b.set_text(0, 0, 0, 0, 'foo\nbar')
assert b.get_lines() == ['foo', 'bar']
b = Buffer('foo REPLACE baz')
b.set_text(0, 4, 0, 11, 'bar')
assert b.get_lines() == ['foo bar baz']
b = Buffer('this is\na test')
b.set_text(0, 5, 1, 1, 'was\nthe')
assert b.get_lines() == ['this was', 'the test']
b = Buffer('this foois\na test')
b.set_text(0, 8, 0, 8, ' ')
assert b.get_lines() == ['this foo is', 'a test']
def test_buffer_set_text_nonexistent_col():
b = Buffer('foo\nbar')
with pytest.raises(ValueError):
b.set_text(0, 4, 0, 0, 'a')
with pytest.raises(ValueError):
b.set_text(0, 0, 0, 4, 'a')
def test_buffer_set_text_negative_col():
b = Buffer('foo\nbar')
with pytest.raises(ValueError):
b.set_text(0, -1, 0, 0, 'a')
with pytest.raises(ValueError):
b.set_text(0, 0, 0, -1, 'a')