add tests and prompt to unlock

tests/unit/git_6.bats

@@ -0,0 +1,32 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  global_setup
+  create_app
+  touch /home/dokku/.ssh/known_hosts
+  chown dokku:dokku /home/dokku/.ssh/known_hosts
+  touch /home/dokku/data/git/$TEST_APP
+
+}
+
+teardown() {
+  rm -f /home/dokku/.ssh/id_rsa.pub || true
+  destroy_app
+  global_teardown
+}
+
+@test "(git) git:unlock [succes]" {
+  run /bin/bash -c "dokku git:unlock $TEST_APP --force" 
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+}
+
+@test "(git) git:unlock [missing]" {
+  run /bin/bash -c "dokku git:unlock
+  echo "output: $output"
+  echo "status: $status"
+  assert_failure
+}