flask/tests/test_testing.py

# -*- coding: utf-8 -*-
"""
    tests.testing
    ~~~~~~~~~~~~~

    Test client and more.

    :copyright: 2010 Pallets
    :license: BSD-3-Clause
"""
import click
import pytest

import flask
import werkzeug

from flask import appcontext_popped
from flask._compat import text_type
from flask.cli import ScriptInfo
from flask.json import jsonify
from flask.testing import make_test_environ_builder, FlaskCliRunner

try:
    import blinker
except ImportError:
    blinker = None


def test_environ_defaults_from_config(app, client):
    app.config['SERVER_NAME'] = 'example.com:1234'
    app.config['APPLICATION_ROOT'] = '/foo'

    @app.route('/')
    def index():
        return flask.request.url

    ctx = app.test_request_context()
    assert ctx.request.url == 'http://example.com:1234/foo/'

    rv = client.get('/')
    assert rv.data == b'http://example.com:1234/foo/'


def test_environ_defaults(app, client, app_ctx, req_ctx):
    @app.route('/')
    def index():
        return flask.request.url

    ctx = app.test_request_context()
    assert ctx.request.url == 'http://localhost/'
    with client:
        rv = client.get('/')
        assert rv.data == b'http://localhost/'


def test_environ_base_default(app, client, app_ctx):
    @app.route('/')
    def index():
        flask.g.user_agent = flask.request.headers["User-Agent"]
        return flask.request.remote_addr

    rv = client.get('/')
    assert rv.data == b'127.0.0.1'
    assert flask.g.user_agent == 'werkzeug/' + werkzeug.__version__


def test_environ_base_modified(app, client, app_ctx):
    @app.route('/')
    def index():
        flask.g.user_agent = flask.request.headers["User-Agent"]
        return flask.request.remote_addr

    client.environ_base['REMOTE_ADDR'] = '0.0.0.0'
    client.environ_base['HTTP_USER_AGENT'] = 'Foo'
    rv = client.get('/')
    assert rv.data == b'0.0.0.0'
    assert flask.g.user_agent == 'Foo'

    client.environ_base['REMOTE_ADDR'] = '0.0.0.1'
    client.environ_base['HTTP_USER_AGENT'] = 'Bar'
    rv = client.get('/')
    assert rv.data == b'0.0.0.1'
    assert flask.g.user_agent == 'Bar'


def test_client_open_environ(app, client, request):
    @app.route('/index')
    def index():
        return flask.request.remote_addr

    builder = make_test_environ_builder(app, path='/index', method='GET')
    request.addfinalizer(builder.close)

    rv = client.open(builder)
    assert rv.data == b'127.0.0.1'

    environ = builder.get_environ()
    client.environ_base['REMOTE_ADDR'] = '127.0.0.2'
    rv = client.open(environ)
    assert rv.data == b'127.0.0.2'


def test_specify_url_scheme(app, client):
    @app.route('/')
    def index():
        return flask.request.url

    ctx = app.test_request_context(url_scheme='https')
    assert ctx.request.url == 'https://localhost/'

    rv = client.get('/', url_scheme='https')
    assert rv.data == b'https://localhost/'


def test_path_is_url(app):
    eb = make_test_environ_builder(app, 'https://example.com/')
    assert eb.url_scheme == 'https'
    assert eb.host == 'example.com'
    assert eb.script_root == ''
    assert eb.path == '/'


def test_blueprint_with_subdomain():
    app = flask.Flask(__name__, subdomain_matching=True)
    app.config['SERVER_NAME'] = 'example.com:1234'
    app.config['APPLICATION_ROOT'] = '/foo'
    client = app.test_client()

    bp = flask.Blueprint('company', __name__, subdomain='xxx')

    @bp.route('/')
    def index():
        return flask.request.url

    app.register_blueprint(bp)

    ctx = app.test_request_context('/', subdomain='xxx')
    assert ctx.request.url == 'http://xxx.example.com:1234/foo/'
    assert ctx.request.blueprint == bp.name

    rv = client.get('/', subdomain='xxx')
    assert rv.data == b'http://xxx.example.com:1234/foo/'


def test_redirect_keep_session(app, client, app_ctx):
    @app.route('/', methods=['GET', 'POST'])
    def index():
        if flask.request.method == 'POST':
            return flask.redirect('/getsession')
        flask.session['data'] = 'foo'
        return 'index'

    @app.route('/getsession')
    def get_session():
        return flask.session.get('data', '<missing>')

    with client:
        rv = client.get('/getsession')
        assert rv.data == b'<missing>'

        rv = client.get('/')
        assert rv.data == b'index'
        assert flask.session.get('data') == 'foo'
        rv = client.post('/', data={}, follow_redirects=True)
        assert rv.data == b'foo'

        # This support requires a new Werkzeug version
        if not hasattr(client, 'redirect_client'):
            assert flask.session.get('data') == 'foo'

        rv = client.get('/getsession')
        assert rv.data == b'foo'


def test_session_transactions(app, client):
    @app.route('/')
    def index():
        return text_type(flask.session['foo'])

    with client:
        with client.session_transaction() as sess:
            assert len(sess) == 0
            sess['foo'] = [42]
            assert len(sess) == 1
        rv = client.get('/')
        assert rv.data == b'[42]'
        with client.session_transaction() as sess:
            assert len(sess) == 1
            assert sess['foo'] == [42]


def test_session_transactions_no_null_sessions():
    app = flask.Flask(__name__)
    app.testing = True

    with app.test_client() as c:
        with pytest.raises(RuntimeError) as e:
            with c.session_transaction() as sess:
                pass
        assert 'Session backend did not open a session' in str(e.value)


def test_session_transactions_keep_context(app, client, req_ctx):
    rv = client.get('/')
    req = flask.request._get_current_object()
    assert req is not None
    with client.session_transaction():
        assert req is flask.request._get_current_object()


def test_session_transaction_needs_cookies(app):
    c = app.test_client(use_cookies=False)
    with pytest.raises(RuntimeError) as e:
        with c.session_transaction() as s:
            pass
    assert 'cookies' in str(e.value)


def test_test_client_context_binding(app, client):
    app.testing = False

    @app.route('/')
    def index():
        flask.g.value = 42
        return 'Hello World!'

    @app.route('/other')
    def other():
        1 // 0

    with client:
        resp = client.get('/')
        assert flask.g.value == 42
        assert resp.data == b'Hello World!'
        assert resp.status_code == 200

        resp = client.get('/other')
        assert not hasattr(flask.g, 'value')
        assert b'Internal Server Error' in resp.data
        assert resp.status_code == 500
        flask.g.value = 23

    try:
        flask.g.value
    except (AttributeError, RuntimeError):
        pass
    else:
        raise AssertionError('some kind of exception expected')


def test_reuse_client(client):
    c = client

    with c:
        assert client.get('/').status_code == 404

    with c:
        assert client.get('/').status_code == 404


def test_test_client_calls_teardown_handlers(app, client):
    called = []

    @app.teardown_request
    def remember(error):
        called.append(error)

    with client:
        assert called == []
        client.get('/')
        assert called == []
    assert called == [None]

    del called[:]
    with client:
        assert called == []
        client.get('/')
        assert called == []
        client.get('/')
        assert called == [None]
    assert called == [None, None]


def test_full_url_request(app, client):
    @app.route('/action', methods=['POST'])
    def action():
        return 'x'

    with client:
        rv = client.post('http://domain.com/action?vodka=42', data={'gin': 43})
        assert rv.status_code == 200
        assert 'gin' in flask.request.form
        assert 'vodka' in flask.request.args


def test_json_request_and_response(app, client):
    @app.route('/echo', methods=['POST'])
    def echo():
        return jsonify(flask.request.get_json())

    with client:
        json_data = {'drink': {'gin': 1, 'tonic': True}, 'price': 10}
        rv = client.post('/echo', json=json_data)

        # Request should be in JSON
        assert flask.request.is_json
        assert flask.request.get_json() == json_data

        # Response should be in JSON
        assert rv.status_code == 200
        assert rv.is_json
        assert rv.get_json() == json_data


@pytest.mark.skipif(blinker is None, reason="blinker is not installed")
def test_client_json_no_app_context(app, client):
    @app.route("/hello", methods=["POST"])
    def hello():
        return "Hello, {}!".format(flask.request.json["name"])

    class Namespace(object):
        count = 0

        def add(self, app):
            self.count += 1

    ns = Namespace()

    with appcontext_popped.connected_to(ns.add, app):
        rv = client.post("/hello", json={"name": "Flask"})

    assert rv.get_data(as_text=True) == "Hello, Flask!"
    assert ns.count == 1


def test_subdomain():
    app = flask.Flask(__name__, subdomain_matching=True)
    app.config['SERVER_NAME'] = 'example.com'
    client = app.test_client()

    @app.route('/', subdomain='<company_id>')
    def view(company_id):
        return company_id

    with app.test_request_context():
        url = flask.url_for('view', company_id='xxx')

    with client:
        response = client.get(url)

    assert 200 == response.status_code
    assert b'xxx' == response.data


def test_nosubdomain(app, client):
    app.config['SERVER_NAME'] = 'example.com'

    @app.route('/<company_id>')
    def view(company_id):
        return company_id

    with app.test_request_context():
        url = flask.url_for('view', company_id='xxx')

    with client:
        response = client.get(url)

    assert 200 == response.status_code
    assert b'xxx' == response.data


def test_cli_runner_class(app):
    runner = app.test_cli_runner()
    assert isinstance(runner, FlaskCliRunner)

    class SubRunner(FlaskCliRunner):
        pass

    app.test_cli_runner_class = SubRunner
    runner = app.test_cli_runner()
    assert isinstance(runner, SubRunner)


def test_cli_invoke(app):
    @app.cli.command('hello')
    def hello_command():
        click.echo('Hello, World!')

    runner = app.test_cli_runner()
    # invoke with command name
    result = runner.invoke(args=['hello'])
    assert 'Hello' in result.output
    # invoke with command object
    result = runner.invoke(hello_command)
    assert 'Hello' in result.output


def test_cli_custom_obj(app):
    class NS(object):
        called = False

    def create_app():
        NS.called = True
        return app

    @app.cli.command('hello')
    def hello_command():
        click.echo('Hello, World!')

    script_info = ScriptInfo(create_app=create_app)
    runner = app.test_cli_runner()
    runner.invoke(hello_command, obj=script_info)
    assert NS.called