Use pytest-docker-pexpect for func tests

tests/functional/utils.py

@@ -1,65 +1,8 @@
 import pytest
 import os
-import subprocess
-import shutil
-from tempfile import mkdtemp
-from pathlib import Path
-import sys
-import pexpect
-from tests.utils import root
 
-
-bare = os.environ.get('BARE')
 enabled = os.environ.get('FUNCTIONAL')
 
-
-def build_container(tag, dockerfile, copy_src=False):
-    tmpdir = mkdtemp()
-    try:
-        if copy_src:
-            subprocess.call(['cp', '-a', str(root), tmpdir])
-        dockerfile_path = Path(tmpdir).joinpath('Dockerfile')
-        with dockerfile_path.open('w') as file:
-            file.write(dockerfile)
-        if subprocess.call(['docker', 'build', '--tag={}'.format(tag), tmpdir]) != 0:
-            raise Exception("Can't build a container")
-    finally:
-        shutil.rmtree(tmpdir)
-
-
-def spawn(request, tag, dockerfile, cmd, install=True, copy_src=False):
-    if bare:
-        proc = pexpect.spawnu(cmd)
-    else:
-        tag = 'thefuck/{}'.format(tag)
-        build_container(tag, dockerfile, copy_src)
-        proc = pexpect.spawnu('docker run --rm=true --volume {}:/src --tty=true '
-                              '--interactive=true {} {}'.format(root, tag, cmd))
-        if install:
-            proc.sendline('pip install /src')
-
-    proc.sendline('cd /')
-
-    proc.logfile = sys.stdout
-
-    def _finalizer():
-        proc.terminate()
-        if not bare:
-            container_id = subprocess.check_output(['docker', 'ps']) \
-                                     .decode('utf-8').split('\n')[-2].split()[0]
-            subprocess.check_call(['docker', 'kill', container_id])
-
-    request.addfinalizer(_finalizer)
-    return proc
-
-
-def images(*items):
-    if bare:
-        return [items[0]]
-    else:
-        return items
-
-
 functional = pytest.mark.skipif(
     not enabled,
     reason='Functional tests are disabled by default.')