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# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import io
import json
import os.path
import tempfile

import click.testing
import google.oauth2.credentials
import mock
import pytest

import google_auth_oauthlib.flow
import google_auth_oauthlib.tool.__main__ as cli

DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
CLIENT_SECRETS_FILE = os.path.join(DATA_DIR, "client_secrets.json")


class TestMain(object):
    @pytest.fixture
    def runner(self):
        return click.testing.CliRunner()

    @pytest.fixture
    def dummy_credentials(self):
        return google.oauth2.credentials.Credentials(
            token="dummy_access_token",
            refresh_token="dummy_refresh_token",
            token_uri="dummy_token_uri",
            client_id="dummy_client_id",
            client_secret="dummy_client_secret",
            scopes=["dummy_scope1", "dummy_scope2"],
        )

    @pytest.fixture
    def local_server_mock(self, dummy_credentials):
        run_local_server_patch = mock.patch.object(
            google_auth_oauthlib.flow.InstalledAppFlow,
            "run_local_server",
            autospec=True,
        )

        with run_local_server_patch as flow:
            flow.return_value = dummy_credentials
            yield flow

    def test_help(self, runner):
        result = runner.invoke(cli.main, ["--help"])
        assert not result.exception
        assert "RFC6749" in result.output
        assert "OAuth 2.0 authorization flow" in result.output
        assert "not intended for production use" in result.output
        assert result.exit_code == 0

    def test_defaults(self, runner, dummy_credentials, local_server_mock):
        result = runner.invoke(
            cli.main, ["--client-secrets", CLIENT_SECRETS_FILE, "--scope", "somescope"]
        )
        local_server_mock.assert_called_with(mock.ANY)
        assert not result.exception
        assert result.exit_code == 0
        creds_data = json.loads(result.output)
        creds = google.oauth2.credentials.Credentials(**creds_data)
        assert creds.token == dummy_credentials.token
        assert creds.refresh_token == dummy_credentials.refresh_token
        assert creds.token_uri == dummy_credentials.token_uri
        assert creds.client_id == dummy_credentials.client_id
        assert creds.client_secret == dummy_credentials.client_secret
        assert creds.scopes == dummy_credentials.scopes

    def test_save_new_dir(self, runner, dummy_credentials, local_server_mock):
        credentials_tmpdir = tempfile.mkdtemp()
        credentials_path = os.path.join(
            credentials_tmpdir, "new-directory", "credentials.json"
        )
        result = runner.invoke(
            cli.main,
            [
                "--client-secrets",
                CLIENT_SECRETS_FILE,
                "--scope",
                "somescope",
                "--credentials",
                credentials_path,
                "--save",
            ],
        )
        local_server_mock.assert_called_with(mock.ANY)
        assert not result.exception
        assert "saved" in result.output
        assert result.exit_code == 0
        with io.open(credentials_path) as f:  # pylint: disable=invalid-name
            creds_data = json.load(f)
            assert "access_token" not in creds_data

            creds = google.oauth2.credentials.Credentials(token=None, **creds_data)
            assert creds.token is None
            assert creds.refresh_token == dummy_credentials.refresh_token
            assert creds.token_uri == dummy_credentials.token_uri
            assert creds.client_id == dummy_credentials.client_id
            assert creds.client_secret == dummy_credentials.client_secret

    def test_save_existing_dir(self, runner, local_server_mock):
        credentials_tmpdir = tempfile.mkdtemp()
        result = runner.invoke(
            cli.main,
            [
                "--client-secrets",
                CLIENT_SECRETS_FILE,
                "--scope",
                "somescope",
                "--credentials",
                os.path.join(credentials_tmpdir, "credentials.json"),
                "--save",
            ],
        )
        local_server_mock.assert_called_with(mock.ANY)
        assert not result.exception
        assert "saved" in result.output
        assert result.exit_code == 0