Add more tests for SHA256TransactionStore.

One of the tests is a known failure because of a bug, so mark it accordingly.

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

test/testfilemanip.py

@@ -1,6 +1,7 @@
 #!/usr/bin/python3
 
 from newfol.filemanip import Record, FileStorage, SHA256TransactionStore
+import newfol.exception
 import tempfile
 import unittest
 
@@ -70,6 +71,36 @@ class SHA256TransactionTest(unittest.TestCase):
             self.assertEqual(SHA256TransactionStore._hash_file(temp),
                     "sha256:" + v)
         tempdir = None
+    def create_small_database(self, tempdir):
+        temp = tempdir.name + "/test"
+        fp = open(temp, "w")
+        fp.write(":\n")
+        fp.close()
+        return temp
+    def create_filestorage(self, *args):
+        class Simple:
+            pass
+        x = Simple()
+        x.tempdir = tempfile.TemporaryDirectory()
+        x.tempfile = self.create_small_database(x.tempdir)
+        x.fs = FileStorage("csv", x.tempfile, "sha256", *args)
+        return x
+    @unittest.expectedFailure
+    def test_missing_not_forgiving(self):
+        x = self.create_filestorage({"forgiving": False})
+        with self.assertRaisesRegex(newfol.exception.UpgradeNeededError,
+                'missing checksum'):
+            x.fs.load()
+        x.tempdir.cleanup()
+    def test_missing_forgiving(self):
+        x = self.create_filestorage({"forgiving": True})
+        x.fs.load()
+        x.tempdir.cleanup()
+    def test_missing(self):
+        x = self.create_filestorage()
+        x.fs.load()
+        x.tempdir.cleanup()
+
 
 if __name__ == '__main__':
     unittest.main()