tests: add test for logs:help

tests/unit/logs.bats

@@ -0,0 +1,19 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  global_setup
+}
+
+teardown() {
+  destroy_app
+  global_teardown
+}
+
+@test "(network) logs:help" {
+  run /bin/bash -c "dokku logs:help"
+  echo "output: $output"
+  echo "status: $status"
+  assert_output_contains "Manage log integration for an app"
+}