Add a basic test for the SHA-256 Transaction store.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>

test/testfilemanip.py

@@ -1,6 +1,6 @@
 #!/usr/bin/python3
 
-from newfol.filemanip import Record, FileStorage
+from newfol.filemanip import Record, FileStorage, SHA256TransactionStore
 import tempfile
 import unittest
 
@@ -53,5 +53,23 @@ class TestRoundTripping(unittest.TestCase):
     def test_pickle(self):
         self.run_test("pickle")
 
+class SHA256TransactionTest(unittest.TestCase):
+    def test_hashing(self):
+        testcases = {
+            "": "0:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+            "abc": "3:ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
+            "©": "2:0a79b0ca699d37228d3affd3b6d38b7f2731702f12fd1edd6cb9ac42a686e3a3",
+            "\ufeff": "3:f1945cd6c19e56b3c1c78943ef5ec18116907a4ca1efc40a57d48ab1db7adfc5",
+        }
+        tempdir = tempfile.TemporaryDirectory()
+        temp = tempdir.name + "/test"
+        for k, v in testcases.items():
+            wfp = open(temp, "w")
+            wfp.write(k)
+            wfp.close()
+            self.assertEqual(SHA256TransactionStore._hash_file(temp),
+                    "sha256:" + v)
+        tempdir = None
+
 if __name__ == '__main__':
     unittest.main()