def test_PexpectEngine_read_all_can_preserve_buffer(pty_pair):
received = 'abcdef'
engine = PexpectEngine()
engine.open(console_fd=pty_pair.main.fd)
pty_pair.secondary.write(received)
received1_actual = engine.read_all(preserve_read_buffer=True)
received2_actual = engine.read_all()
received3_actual = engine.read_all()
assert received1_actual == received
assert received2_actual == received
assert received3_actual == ''
def test_PexpectEngine_read_all_reads_from_console(pty_pair):
received = 'abcdef'
engine = PexpectEngine()
engine.open(console_fd=pty_pair.main.fd)
pty_pair.secondary.write(received)
received_actual = engine.read_all()
assert received_actual == received
def test_PexpectEngine_read_all_returns_received_only_once(pty_pair):
received = 'abcdef'
engine = PexpectEngine()
engine.open(console_fd=pty_pair.main.fd)
pty_pair.secondary.write(received)
received1_actual = engine.read_all()
received2_actual = engine.read_all()
assert received1_actual == received
assert received2_actual == ''