test(amazonq): add language server activation tests (#6773)

## Problem
- we have tests for the amazon q lsp installer but not the workspace
context lsp installer

## Solution
- add tests for the workspace context lsp installer
- add a test for language server activation

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: jpinkney-aws

packages/amazonq/src/lsp/lspInstaller.ts

@@ -6,10 +6,11 @@
 import { fs, getNodeExecutableName, BaseLspInstaller, ResourcePaths } from 'aws-core-vscode/shared'
 import path from 'path'
 import { getAmazonQLspConfig } from './config'
+import { LspConfig } from 'aws-core-vscode/amazonq'
 
 export class AmazonQLspInstaller extends BaseLspInstaller.BaseLspInstaller {
-    constructor() {
-        super(getAmazonQLspConfig(), 'amazonqLsp')
+    constructor(lspConfig: LspConfig = getAmazonQLspConfig()) {
+        super(lspConfig, 'amazonqLsp')
     }
 
     protected override async postInstall(assetDirectory: string): Promise<void> {

packages/amazonq/test/e2e/lsp/amazonqLsp.test.ts

@@ -0,0 +1,31 @@
+/*!
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { AmazonQLspInstaller } from '../../../src/lsp/lspInstaller'
+import { defaultAmazonQLspConfig } from '../../../src/lsp/config'
+import { createLspInstallerTests } from './lspInstallerUtil'
+import { LspConfig } from 'aws-core-vscode/amazonq'
+
+describe('AmazonQLSP', () => {
+    createLspInstallerTests({
+        suiteName: 'AmazonQLSPInstaller',
+        lspConfig: defaultAmazonQLspConfig,
+        createInstaller: (lspConfig?: LspConfig) => new AmazonQLspInstaller(lspConfig),
+        targetContents: [
+            {
+                bytes: 0,
+                filename: 'servers.zip',
+                hashes: [],
+                url: 'http://fakeurl',
+            },
+        ],
+        setEnv: (path: string) => {
+            process.env.__AMAZONQLSP_PATH = path
+        },
+        resetEnv: () => {
+            delete process.env.__AMAZONQLSP_PATH
+        },
+    })
+})