test(sharness): make sure we can actually enable autonat

This isn't a real autonat test, but it's a regression test to make sure we don't blatantly break this.

test/sharness/t0185-autonat.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+test_description="Test autonat"
+
+. lib/test-lib.sh
+
+# NOTE: This is currently a really dumb test just to make sure this service
+# starts. We need better tests but testing AutoNAT without public IP addresses
+# is tricky.
+
+test_init_ipfs
+
+test_expect_success "enable autonat" '
+  ipfs config --json Swarm.EnableAutoNATService true
+'
+
+test_launch_ipfs_daemon
+
+test_kill_ipfs_daemon
+
+test_done