test: replace chai with node:assert

README.md

@@ -177,7 +177,8 @@ Run `npm run lint` or install an editor plugin.
 
 # Testing
 
-Tests are written using the [Chai](http://chaijs.com/) library. See
+Tests are written using the [Mocha](https://mochajs.org/) test runner and
+[`node:assert`](https://nodejs.org/api/assert.html) assertion library. See
 [`config_test.ts`](./src/config_test.ts) for an example.
 
 To run tests, execute the following:

eslint.config.js

@@ -21,7 +21,6 @@ export default tseslint.config(
             '@typescript-eslint/no-empty-object-type': 'off',
             '@typescript-eslint/no-explicit-any': 'off',
             '@typescript-eslint/no-non-null-assertion': 'off',
-            '@typescript-eslint/no-unused-expressions': 'off',
             '@typescript-eslint/no-unused-vars': ['error', { args: 'none' }],
         },
     },

package.json

@@ -80,13 +80,9 @@
     },
     "devDependencies": {
         "@eslint/js": "^9.18.0",
-        "@types/chai": "^5.0.0",
-        "@types/chai-as-promised": "^8.0.1",
         "@types/mocha": "^10.0.1",
         "@types/mock-fs": "^4.13.1",
         "c8": "^10.0.0",
-        "chai": "^5.1.2",
-        "chai-as-promised": "^8.0.0",
         "eslint": "^9.18.0",
         "husky": "^9.0.6",
         "mocha": "^11.0.1",

src/attach_test.ts

@@ -1,4 +1,4 @@
-import { expect } from 'chai';
+import { strictEqual } from 'node:assert';
 import WebSocket from 'isomorphic-ws';
 import { ReadableStreamBuffer, WritableStreamBuffer } from 'stream-buffers';
 import { anyFunction, anything, capture, instance, mock, verify, when } from 'ts-mockito';
@@ -73,7 +73,7 @@ describe('Attach', () => {
             await attach.attach(namespace, pod, container, osStream, errStream, isStream, false);
             const [, , outputFn] = capture(fakeWebSocketInterface.connect).last();
 
-            expect(outputFn).to.not.be.null;
+            strictEqual(typeof outputFn, 'function');
 
             // this is redundant but needed for the compiler, sigh...
             if (!outputFn) {
@@ -83,18 +83,18 @@ describe('Attach', () => {
             let buffer = Buffer.alloc(1024, 10);
 
             outputFn(WebSocketHandler.StdoutStream, buffer);
-            expect(osStream.size()).to.equal(1024);
+            strictEqual(osStream.size(), 1024);
             let buff = osStream.getContents() as Buffer;
             for (let i = 0; i < 1024; i++) {
-                expect(buff[i]).to.equal(10);
+                strictEqual(buff[i], 10);
             }
 
             buffer = Buffer.alloc(1024, 20);
             outputFn(WebSocketHandler.StderrStream, buffer);
-            expect(errStream.size()).to.equal(1024);
+            strictEqual(errStream.size(), 1024);
             buff = errStream.getContents() as Buffer;
             for (let i = 0; i < 1024; i++) {
-                expect(buff[i]).to.equal(20);
+                strictEqual(buff[i], 20);
             }
 
             const initialTerminalSize: TerminalSize = { height: 0, width: 0 };