explicit test for opening 2.0 format db with hmac

test/crypto.test

@@ -1556,4 +1556,15 @@ do_test multipage-schema-autovacuum-shortread-wal {
 db close
 file delete -force test.db
 
+# open a 2.0 database verify it can be opened
+do_test open-2.0-database {
+  sqlite_orig db sqlcipher-2.0-testkey.db
+  execsql {
+    PRAGMA key = 'testkey';
+    SELECT count(*) FROM t1;
+    SELECT * FROM t1;
+  } 
+} {4 1 1 one one 1 2 one two}
+db close
+
 finish_test