trying to reproduce unstable hash bug on travis

.travis.yml

@@ -29,6 +29,7 @@ matrix:
         - pip3 install codecov
       install:
         - pip3 install ".[test]"
+      before_script: python3 test/prepare_text_caching_test.py
       script: python3 -m pytest
       after_success: python 3 -m codecov
     - name: "Python 3.7.3 on macOS 10.14"
@@ -42,6 +43,7 @@ matrix:
         - pip3 install codecov
       install:
         - pip3 install ".[test]"
+      before_script: python3 test/prepare_text_caching_test.py
       script: python3 -m pytest
       after_success: python3 -m codecov
     #  ====== WINDOWS =========
@@ -85,6 +87,7 @@ 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 test/prepare_text_caching_test.py
 script: pytest
 after_success:
   - codecov  # submit coverage to codecov.io

cachier_text_cache_temp.pkl

@@ -0,0 +1 @@
+€G?Öľ2ÍM)F.

tests/prepare_text_caching_test.py

@@ -0,0 +1,25 @@
+"""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
+
+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(hash(text))
+    return random()
+
+
+if __name__ == '__main__':
+    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

@@ -16,6 +16,7 @@ from time import (
     time,
     sleep
 )
+from pickle import load
 from datetime import timedelta
 from random import random
 import threading
@@ -27,6 +28,12 @@ except ImportError:  # python 2
 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
 
@@ -392,3 +399,18 @@ def test_pickle_core_custom_cache_dir():
     assert end - start < 1
     _takes_5_seconds_custom_dir.clear_cache()
     assert _takes_5_seconds_custom_dir.cache_dpath() == EXPANDED_CUSTOM_DIR
+
+
+def test_text_hashing():
+    text = TEXT_VAL_TO_CHECK
+    with open(TEXT_CACHE_FNAME, 'rb') as f:
+        first = load(f)
+    print('\npickled return val found for text cache text:')
+    print(first)
+    start_time = time()
+    second = text_caching(text)
+    print('second value returned:')
+    print(second)
+    call_time = time() - start_time
+    assert call_time < 1
+    assert first == second