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"""Integration test for LP: #1901011

Ensure an ephemeral disk exists after boot.

See https://github.com/canonical/cloud-init/pull/800
"""
import pytest

from tests.integration_tests.clouds import IntegrationCloud


@pytest.mark.azure
@pytest.mark.parametrize(
    "instance_type,is_ephemeral",
    [
        ("Standard_DS1_v2", True),
        ("Standard_D2s_v4", False),
    ],
)
def test_ephemeral(
    instance_type, is_ephemeral, session_cloud: IntegrationCloud, setup_image
):
    if is_ephemeral:
        expected_log = (
            "Ephemeral resource disk '/dev/disk/cloud/azure_resource' exists. "
            "Merging default Azure cloud ephemeral disk configs."
        )
    else:
        expected_log = (
            "Ephemeral resource disk '/dev/disk/cloud/azure_resource' does "
            "not exist. Not merging default Azure cloud ephemeral disk "
            "configs."
        )

    with session_cloud.launch(
        launch_kwargs={"instance_type": instance_type}
    ) as client:
        # Verify log file
        log = client.read_from_file("/var/log/cloud-init.log")
        assert expected_log in log

        # Verify devices
        dev_links = client.execute("ls /dev/disk/cloud")
        assert "azure_root" in dev_links
        assert "azure_root-part1" in dev_links
        if is_ephemeral:
            assert "azure_resource" in dev_links
            assert "azure_resource-part1" in dev_links

        # Verify mounts
        blks = client.execute("lsblk -pPo NAME,TYPE,MOUNTPOINT")
        root_device = client.execute(
            "realpath /dev/disk/cloud/azure_root-part1"
        )
        assert (
            'NAME="{}" TYPE="part" MOUNTPOINT="/"'.format(root_device) in blks
        )
        if is_ephemeral:
            ephemeral_device = client.execute(
                "realpath /dev/disk/cloud/azure_resource-part1"
            )
            assert (
                'NAME="{}" TYPE="part" MOUNTPOINT="/mnt"'.format(
                    ephemeral_device
                )
                in blks
            )