[IS-8/feat]: add unit test for connection

src/environment.ts

@@ -20,7 +20,7 @@ export class AmqpEnvironment implements Environment {
   private readonly username: string
   private readonly password: string
   private readonly container: Container
-  private connections: Connection[] = []
+  private readonly connections: Connection[] = []
 
   constructor({ host, port, username, password }: EnvironmentParams) {
     this.host = host
@@ -53,7 +53,7 @@ export class AmqpEnvironment implements Environment {
 
   async close(): Promise<void> {
     await this.closeConnections()
-    this.connections = []
+    this.connections.length = 0
   }
 
   private async closeConnections(): Promise<void> {

test/unit/connection.test.ts

@@ -0,0 +1,34 @@
+import { afterEach, beforeEach, describe, test } from "vitest"
+import { use, expect } from "chai"
+import chaiAsPromised from "chai-as-promised"
+import { createEnvironment, Environment } from "../../src/environment.js"
+import { host, port, username, password, numberOfConnections, eventually } from "../support/util.js"
+
+use(chaiAsPromised)
+
+describe("Connection", () => {
+  let environment: Environment
+
+  beforeEach(async () => {
+    environment = createEnvironment({
+      host,
+      port,
+      username,
+      password,
+    })
+  })
+
+  afterEach(async () => {
+    await environment.close()
+  })
+
+  test("closing the connection", async () => {
+    const connection = await environment.createConnection()
+
+    await connection.close()
+
+    await eventually(async () => {
+      expect(await numberOfConnections()).to.eql(0)
+    })
+  })
+})