feat: add RabbitMQ monitor (#5199)

Co-authored-by: Frank Elsinga <frank@elsinga.de>

test/backend-test/test-rabbitmq.js

@@ -0,0 +1,53 @@
+const { describe, test } = require("node:test");
+const assert = require("node:assert");
+const { RabbitMQContainer } = require("@testcontainers/rabbitmq");
+const { RabbitMqMonitorType } = require("../../server/monitor-types/rabbitmq");
+const { UP, DOWN, PENDING } = require("../../src/util");
+
+describe("RabbitMQ Single Node", {
+    skip: !!process.env.CI && (process.platform !== "linux" || process.arch !== "x64"),
+}, () => {
+    test("RabbitMQ is running", async () => {
+        // The default timeout of 30 seconds might not be enough for the container to start
+        const rabbitMQContainer = await new RabbitMQContainer().withStartupTimeout(60000).start();
+        const rabbitMQMonitor = new RabbitMqMonitorType();
+        const connectionString = `http://${rabbitMQContainer.getHost()}:${rabbitMQContainer.getMappedPort(15672)}`;
+
+        const monitor = {
+            rabbitmqNodes: JSON.stringify([ connectionString ]),
+            rabbitmqUsername: "guest",
+            rabbitmqPassword: "guest",
+        };
+
+        const heartbeat = {
+            msg: "",
+            status: PENDING,
+        };
+
+        try {
+            await rabbitMQMonitor.check(monitor, heartbeat, {});
+            assert.strictEqual(heartbeat.status, UP);
+            assert.strictEqual(heartbeat.msg, "OK");
+        } finally {
+            rabbitMQContainer.stop();
+        }
+    });
+
+    test("RabbitMQ is not running", async () => {
+        const rabbitMQMonitor = new RabbitMqMonitorType();
+        const monitor = {
+            rabbitmqNodes: JSON.stringify([ "http://localhost:15672" ]),
+            rabbitmqUsername: "rabbitmqUser",
+            rabbitmqPassword: "rabbitmqPass",
+        };
+
+        const heartbeat = {
+            msg: "",
+            status: PENDING,
+        };
+
+        await rabbitMQMonitor.check(monitor, heartbeat, {});
+        assert.strictEqual(heartbeat.status, DOWN);
+    });
+
+});