Migrate integration-tests to typescript

Give us better confidence in our javascript code by writing it in
typescript!

Changes the tests to use typescript, and fixes compiler errors that went
just unnoticed until now.
We do not introduce eslint (yet), which might give us even better
warnings.

At last, changes the tests to always invoke `hdb` with a custom cache
directory to ensure a perfectly hermetic test experience.

Author: fendor

.gitignore

@@ -1,6 +1,7 @@
 *.bkp
 .vscode/
 node_modules/
+test/integration-tests/out/
 vscode-extension/dist/
 vscode-extension/result
 dist-newstyle/

test/integration-tests/.mocharc.json

@@ -0,0 +1,5 @@
+{
+  "extension": ["ts"],
+  "spec": "test/**/*.test.ts",
+  "require": "ts-node/register"
+}

test/integration-tests/Makefile

@@ -8,10 +8,10 @@ clean:
 	rm -rf ./node_modules
 
 node_modules:
-	nix-shell -p 'nodejs' --run 'npm install'
+	nix-shell -p 'nodejs' --run 'npm install && npm run compile'
 
 test: node_modules
 	# PATH=$(dir $(GHC)):$(dir $(DEBUGGER)):$$PATH ./node_modules/.bin/mocha -f 'allow arbitrarily deep'
 	# nix-shell -p nodejs --run 'PATH=$(dir $(GHC)):$(dir $(DEBUGGER)):$$PATH ./node_modules/.bin/mocha'
 	@echo "NODE: $(node)"
-	PATH=$(dir $(GHC)):$(dir $(DEBUGGER)):$(dir $(node)):$$PATH ./node_modules/.bin/mocha --parallel
+	PATH=$(dir $(GHC)):$(dir $(DEBUGGER)):$(dir $(node)):$$PATH npm run test

test/integration-tests/package-lock.json

@@ -1,12 +1,19 @@
 {
   "name": "hdb-integration-tests",
   "version": "1.0.0",
-  "type": "module",
+  "type": "commonjs",
   "dependencies": {
     "@vscode/debugadapter-testsupport": "^1.68",
     "mocha": "^11.2.2"
   },
   "scripts": {
-    "test": "mocha"
+    "compile": "tsc",
+    "test": "mocha --parallel"
+  },
+  "devDependencies": {
+    "@types/mocha": "^10.0.10",
+    "@types/node": "^24.3.0",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.9.2"
   }
 }