[bitnami/nats] Adapt NATS tests to Air-gapped environments

Signed-off-by: Jota Martos <jotamartos@vmware.com>

.vib/nats/goss/goss.yaml

@@ -18,7 +18,7 @@ command:
     ## We need to have the subscriber process running at the same time the publishing is done
     ## The sleep is needed to avoid a race condition where the publishing is done before the subscriber is ready
     ## The subscriber process needs to be timed out so there is no dangling process making goss timeout
-    exec: ( USER={{ $running_user }} timeout 10 nats {{ $auth }} {{ $lb_endpoint }} sub {{ $subject }}; ) & sleep 3 && USER={{ $running_user }} nats {{ $auth }} {{ $lb_endpoint }} pub {{ $subject }} {{ $msg }}
+    exec: ( USER={{ $running_user }} timeout 10 ./nats/goss/testfiles/nats {{ $auth }} {{ $lb_endpoint }} sub {{ $subject }}; ) & sleep 3 && USER={{ $running_user }} ./nats/goss/testfiles/nats {{ $auth }} {{ $lb_endpoint }} pub {{ $subject }} {{ $msg }}
     exit-status: 0
     stdout:
     - /Received on.*{{ $subject }}/
@@ -29,7 +29,7 @@ command:
     {{- $subject := printf "subj_%s" (randAlpha 5) }}
     {{- $msg := printf "msg_%s" (randAlpha 5) }}
     {{- $pod_endpoint := printf "-s nats://nats-%d.nats-headless:%s" $i $client_port }}
-    exec: ( USER={{ $running_user }} timeout 10 nats {{ $auth }} {{ $pod_endpoint }} sub {{ $subject }}; ) & sleep 3 && USER={{ $running_user }} nats {{ $auth }} {{ $lb_endpoint }} pub {{ $subject }} {{ $msg }}
+    exec: ( USER={{ $running_user }} timeout 10 ./nats/goss/testfiles/nats {{ $auth }} {{ $pod_endpoint }} sub {{ $subject }}; ) & sleep 3 && USER={{ $running_user }} ./nats/goss/testfiles/nats {{ $auth }} {{ $lb_endpoint }} pub {{ $subject }} {{ $msg }}
     exit-status: 0
     stdout:
     - /Received on.*{{ $subject }}/

.vib/nats/goss/testfiles/README.md

@@ -0,0 +1,7 @@
+# How to update this folder
+
+* Download the latest binary from the [GitHub repository](https://github.com/nats-io/natscli/releases) using the downloadCLI.sh script
+
+```
+./downloadCLI.sh
+```

.vib/nats/goss/testfiles/downloadCLI.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+cd "$(git rev-parse --show-toplevel)/.vib/nats/goss/testfiles/"
+curl -Ls https://api.github.com/repos/nats-io/natscli/releases/latest | grep browser_download_url | grep linux-amd64 | cut -d '"' -f 4 | xargs curl -L -o /tmp/nats-cli.zip
+unzip -jo /tmp/nats-cli.zip '*/nats'
+rm -rf /tmp/nats-cli.zip