1 files changed, 23 insertions, 0 deletions
diff --git a/tests/integration/test_upgrade.py b/tests/integration/test_upgrade.py
new file mode 100644
index 0000000..162024e
--- /dev/null
+++ b/tests/integration/test_upgrade.py
@@ -0,0 +1,23 @@
+from shutil import copyfile
+
+import pytest
+
+from requests_cache import CachedSession
+from tests.conftest import HTTPBIN_FORMATS, SAMPLE_CACHE_FILES, httpbin
+
+
+@pytest.mark.parametrize('db_path', SAMPLE_CACHE_FILES)
+def test_version_upgrade(db_path, tempfile_path):
+    """Load SQLite cache files created with older versions of requests-cache.
+    Expected behavior: either
+    1. Serialization format is incompatible, and previous cache items have been invalidated, or
+    2. Serialization format is compatible, and previous cache items are valid
+
+    The previously cached responses should be either replaced or retrieved without any errors.
+    """
+    copyfile(db_path, tempfile_path)
+    session = CachedSession(tempfile_path)
+
+    for response_format in HTTPBIN_FORMATS:
+        session.get(httpbin(response_format)).from_cache
+        assert session.get(httpbin(response_format)).from_cache is True