from unittest import TestCase
from mocker import MockerTestCase

from cloudinit.CloudConfig.cc_ca_certs import handle, write_file, update_ca_certs, add_ca_certs

class TestNoConfig(MockerTestCase):
    def setUp(self):
        super(TestNoConfig, self).setUp()
        self.name = "ca-certs"
        self.cloud_init = None
        self.log = None
        self.args = []

    def test_no_config(self):
        """
        Test that nothing is done if no ca-certs configuration is provided.
        """
        config = {"unknown-key": "value"}

        self.mocker.replace(write_file, passthrough=False)
        self.mocker.replace(update_ca_certs, passthrough=False)
        self.mocker.replay()

        handle(self.name, config, self.cloud_init, self.log, self.args)


class TestConfig(MockerTestCase):
    def setUp(self):
        super(TestConfig, self).setUp()
        self.name = "ca-certs"
        self.cloud_init = None
        self.log = None
        self.args = []

        # The config option is present for all these tests so
        # update_ca_certs should always be called.
        mock = self.mocker.replace(update_ca_certs, passthrough=False)
        mock()

    def test_no_trusted_list(self):
        """Test that no certificate are written if not provided."""
        config = {"ca-certs": {}}

        mock = self.mocker.replace(write_file, passthrough=False)
        self.mocker.replay()

        handle(self.name, config, self.cloud_init, self.log, self.args)


class TestAddCaCerts(MockerTestCase):
    def test_no_certs_in_list(self):
        """Test that no certificate are written if not provided."""
        mock = self.mocker.replace(write_file, passthrough=False)
        self.mocker.replay()

        add_ca_certs([])

    def test_single_cert(self):
        """Test adding a single certificate to the trusted CAs"""
        cert = "CERT1\nLINE2\nLINE3"

        mock = self.mocker.replace(write_file, passthrough=False)
        mock("/usr/share/ca-certificates/cloud-init-provided.crt",
             cert, "root", "root", "644")
        self.mocker.replay()

        add_ca_certs([cert])

    def test_multiple_certs(self):
        """Test adding multiple certificate to the trusted CAs"""
        certs = ["CERT1\nLINE2\nLINE3", "CERT2\nLINE2\nLINE3"]
        expected_cert_file = "\n".join(certs)

        mock = self.mocker.replace(write_file, passthrough=False)
        mock("/usr/share/ca-certificates/cloud-init-provided.crt",
             expected_cert_file, "root", "root", "644")
        self.mocker.replay()

        add_ca_certs(certs)

class TestUpdateCaCerts(MockerTestCase):
    def test_commands(self):
        mock_check_call = self.mocker.replace("subprocess.check_call",
                                              passthrough=False)
        mock_check_call(["dpkg-reconfigure", "ca-certificates"])
        mock_check_call(["update-ca-certificates"])
        self.mocker.replay()

        update_ca_certs()