factor out function for getting top level directory of cloudinit (#1136)

Add a test helper to get top level directory

Many tests need to get the location of files & dirs within the cloud-init
project directory.

Tests implement this in various different ways, and often those ways
depend on the current working directory of the pytest invocation.
Create helper functions (and tests) that gets the path of the top
directory or any sub directory under the top directory. This function
does not depend on the environment.

1 files changed, 7 insertions, 3 deletions

diff --git a/tests/unittests/test_ds_identify.py b/tests/unittests/test_ds_identify.py
index 62c3e403..eb8992d9 100644
--- a/tests/unittests/test_ds_identify.py
+++ b/tests/unittests/test_ds_identify.py
@@ -9,8 +9,12 @@ from cloudinit import safeyaml
 from cloudinit import subp
 from cloudinit import util
 from tests.unittests.helpers import (
-    CiTestCase, dir2dict, populate_dir, populate_dir_with_ts)
-
+    CiTestCase,
+    dir2dict,
+    populate_dir,
+    populate_dir_with_ts,
+    cloud_init_project_dir,
+)
 from cloudinit.sources import DataSourceIBMCloud as ds_ibm
 from cloudinit.sources import DataSourceSmartOS as ds_smartos
 from cloudinit.sources import DataSourceOracle as ds_oracle
@@ -92,7 +96,7 @@ CallReturn = namedtuple('CallReturn',
 
 
 class DsIdentifyBase(CiTestCase):
-    dsid_path = os.path.realpath('tools/ds-identify')
+    dsid_path = cloud_init_project_dir('tools/ds-identify')
     allowed_subp = ['sh']
 
     def call(self, rootd=None, mocks=None, func="main", args=None, files=None,