Add bats test for host network driver

Bats test asserts on both scenarios:

- Binding a process port to 0.0.0.0
- Binding a process port to 127.0.0.1

Signed-off-by: Nino Kodabande <[email protected]>

bats/tests/containers/host-network-ports.bats

@@ -0,0 +1,41 @@
+load '../helpers/load'
+
+LOCALHOST="127.0.0.1"
+
+@test 'factory reset' {
+    factory_reset
+}
+
+@test 'start container engine' {
+    start_container_engine
+    wait_for_container_engine
+}
+
+run_container_with_host_network_driver() {
+    local image="python:slim"
+    ctrctl pull "$image"
+    ctrctl run -d --network=host --restart=no "$image" "$@"
+}
+
+verify_container_port() {
+    run try --max 9 --delay 10 curl --insecure --verbose --show-error "$@"
+    assert_success
+    assert_output --partial 'Directory listing for'
+}
+
+@test 'process is bound to 0.0.0.0 using host network driver' {
+    local container_port="8010"
+    run_container_with_host_network_driver python -m http.server "$container_port"
+    verify_container_port "http://$LOCALHOST:$container_port"
+    skip_unless_host_ip
+    verify_container_port "http://${HOST_IP}:$container_port"
+}
+
+@test 'process is bound to 127.0.0.1 using host network driver' {
+    local container_port="8016"
+    run_container_with_host_network_driver python -m http.server $container_port --bind "$LOCALHOST"
+    verify_container_port "http://$LOCALHOST:$container_port"
+    skip_unless_host_ip
+    run curl --verbose --head "http://${HOST_IP}:$container_port"
+    assert_output --partial "curl: (7) Failed to connect"
+}