adler32 solves cross-kernel stable caching on my local machine

.travis.yml

@@ -29,7 +29,6 @@ matrix:
         - pip3 install codecov
       install:
         - pip3 install ".[test]"
-      before_script: python3 tests/prepare_text_caching_test.py
       script: python3 -m pytest
       after_success: python 3 -m codecov
     - name: "Python 3.7.3 on macOS 10.14"
@@ -43,7 +42,6 @@ matrix:
         - pip3 install codecov
       install:
         - pip3 install ".[test]"
-      before_script: python3 tests/prepare_text_caching_test.py
       script: python3 -m pytest
       after_success: python3 -m codecov
     #  ====== WINDOWS =========
@@ -87,7 +85,7 @@ install:
   - echo $TRAVIS_OS_NAME
   - pip install ".[test]"
   # - if [ "$TRAVIS_PYTHON_VERSION" == "2.7" ] && ["$TRAVIS_OS_NAME" == "linux"]; then pip install coverage pytest-cov .; else pip install ".[test]"; fi
-before_script: python tests/prepare_text_caching_test.py
+before_script: pytest -m prep
 script: pytest
 after_success:
   - codecov  # submit coverage to codecov.io

pytest.ini

@@ -11,3 +11,4 @@ addopts =
     -r a
     -v
     -s
+    -m "not prep"

tests/prepare_text_caching_test.py

@@ -1,28 +0,0 @@
-"""Prepares a pickle cache for the text hashing test function."""
-
-
-from cachier import cachier
-from time import sleep
-from random import random
-from pickle import dump, dumps
-from zlib import adler32
-
-
-TEXT_VAL_TO_CHECK = 'foo'
-TEXT_CACHE_FNAME = 'cachier_text_cache_temp.pkl'
-
-
-@cachier(pickle_reload=False)
-def text_caching(text):
-    sleep(1)
-    print(text)
-    print(adler32(dumps(text)) & 0xffffffff)
-    return random()
-
-
-if __name__ == '__main__':
-    text_caching.clear_cache()
-    return_val = text_caching(TEXT_VAL_TO_CHECK)
-    print(return_val)
-    with open(TEXT_CACHE_FNAME, 'wb+') as f:
-        dump(return_val, f)

tests/test_pickle_core.py

@@ -16,24 +16,20 @@ from time import (
     time,
     sleep
 )
-from pickle import load
+from pickle import load, dump, dumps
 from datetime import timedelta
 from random import random
+from zlib import adler32
 import threading
 try:
     import queue
 except ImportError:  # python 2
     import Queue as queue
 
+import pytest
 from cachier import cachier
 from cachier.pickle_core import DEF_CACHIER_DIR
 
-from .prepare_text_caching_test import (
-    TEXT_VAL_TO_CHECK,
-    TEXT_CACHE_FNAME,
-    text_caching,
-)
-
 
 # Pickle core tests
 
@@ -401,6 +397,27 @@ def test_pickle_core_custom_cache_dir():
     assert _takes_5_seconds_custom_dir.cache_dpath() == EXPANDED_CUSTOM_DIR
 
 
+TEXT_VAL_TO_CHECK = 'foo'
+TEXT_CACHE_FNAME = 'cachier_text_cache_temp.pkl'
+
+
+@cachier()
+def text_caching(text):
+    sleep(1)
+    print(text)
+    print(adler32(dumps(text)) & 0xffffffff)
+    return random()
+
+
+@pytest.mark.prep
+def test_prep_text_hashing():
+    text_caching.clear_cache()
+    return_val = text_caching(TEXT_VAL_TO_CHECK)
+    print(return_val)
+    with open(TEXT_CACHE_FNAME, 'wb+') as f:
+        dump(return_val, f)
+
+
 def test_text_hashing():
     with open(TEXT_CACHE_FNAME, 'rb') as f:
         first = load(f)