test_examples.py

# Copyright (c) 2015 Uber Technologies, Inc.
#
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# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

import contextlib
import os
import subprocess

import pytest


@contextlib.contextmanager
def popen(path, pipe=subprocess.PIPE):

    process = subprocess.Popen(
        ['python', path],
        stdout=pipe,
        stderr=pipe,
    )
    process.poll()

    try:
        yield process
    finally:
        process.kill()


@pytest.yield_fixture
def examples_dir():
    cwd = os.getcwd()

    examples = os.path.join(cwd, 'examples')

    assert os.path.exists(examples)

    try:
        os.chdir(examples)
        yield examples
    finally:
        os.chdir(cwd)


@pytest.mark.parametrize(
    'example_type',
    ['raw', 'thrift_examples/thrift', 'json']#, 'stream'],
)
def test_example(examples_dir, example_type):

    server_path = os.path.join(
        examples_dir,
        example_type + '_server.py',
    )

    client_path = os.path.join(
        examples_dir,
        example_type + '_client.py',
    )

    with popen(server_path, pipe=None):
        # :(
        import time
        time.sleep(0.01)
        with popen(client_path) as client:
            assert (
                client.stdout.read() == 'Hello, world!\n'
            ), client.stderr.read()