run pytest using a temp home directory

.gitignore

@@ -120,6 +120,7 @@ build_tools/crowdin-cli.jar
 
 # Ignore pytest cache directory
 .pytest_cache/
+.pytest_kolibri_home
 
 # ignore source font files
 *.ttf

kolibri/conftest.py

@@ -0,0 +1,14 @@
+import os
+import shutil
+
+import pytest
+
+# referenced in pytest.ini
+TEMP_KOLIBRI_HOME = "./.pytest_kolibri_home"
+
+
+@pytest.fixture(scope="session", autouse=True)
+def global_fixture():
+    yield  # wait until the test ended
+    if os.path.exists(TEMP_KOLIBRI_HOME):
+        shutil.rmtree(TEMP_KOLIBRI_HOME)

pytest.ini

@@ -6,3 +6,6 @@ django_find_project = false
 DJANGO_SETTINGS_MODULE = kolibri.deployment.default.settings.test
 # Settings for pytest-pythonpath
 python_paths = kolibri/dist
+env =
+    # cleaned up in conftest.py fixture
+    KOLIBRI_HOME=./.pytest_kolibri_home

requirements/test.txt

@@ -7,5 +7,6 @@ mixer==6.0.1
 pytest==3.7.1 # pyup: < 4.0.0
 pytest-cov==2.5.1
 pytest-django==3.3.3
+pytest-env==0.6.2
 pytest-pythonpath==0.7.2
 sh==1.12.14