Additional database file checks in cli/Utils.unlockDatabase

Avoids prompting the user for a password if unlocking is likely to fail
due to some problem with the database file (i.e. not found, not a file,
not readable).

Add unit tests.

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/TestCli.h b/tests/TestCli.h
index c012fc807..a313fe224 100644
--- a/tests/TestCli.h
+++ b/tests/TestCli.h
@@ -63,6 +63,7 @@ private slots:
     void testRemove();
     void testRemoveQuiet();
     void testShow();
+    void testInvalidDbFiles();
 
 private:
     QByteArray m_dbData;