Add test files to eslint using specialized tsconfig

.eslintrc.js

@@ -12,7 +12,7 @@ module.exports = {
   parser: '@typescript-eslint/parser',
   parserOptions: {
     tsconfigRootDir: __dirname,
-    project: './tsconfig.json',
+    project: './tsconfig.lint.json',
   },
   rules: {
     '@typescript-eslint/no-unused-vars': [
@@ -71,5 +71,6 @@ module.exports = {
     '@typescript-eslint/no-unsafe-assignment': 'off',
     '@typescript-eslint/no-unsafe-call': 'off',
     '@typescript-eslint/no-unsafe-return': 'off',
+    '@typescript-eslint/prefer-nullish-coalescing': 'off',
   },
 }

package.json

@@ -22,7 +22,7 @@
   "scripts": {
     "test": "jest",
     "coverage": "npm test -- --coverage",
-    "lint": "eslint --ext .js,.ts src",
+    "lint": "eslint --ext .js,.ts src test",
     "clean": "rimraf dist esm",
     "prebuild": "npm run clean && npm run lint",
     "build:esm": "tsc --target es2018 --outDir esm",
@@ -55,10 +55,10 @@
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-import": "^2.27.5",
     "eslint-plugin-prettier": "^5.0.1",
-    "eslint-plugin-unicorn": "^49.0.0",
+    "eslint-plugin-unicorn": "^50.0.1",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.5.0",
-    "prettier": "^3.1.1",
+    "prettier": "^3.2.4",
     "rimraf": "^5.0.1",
     "standard-changelog": "^5.0.0",
     "ts-jest": "^29.1.1",

test/tabixindexedfile.test.ts

@@ -60,7 +60,7 @@ test('can read ctgA:1000..4000', async () => {
 
   const headerString = await f.getHeader()
   expect(headerString.length).toEqual(10431)
-  expect(headerString[headerString.length - 1]).toEqual('\n')
+  expect(headerString.at(-1)).toEqual('\n')
 
   expect(await f.getMetadata()).toEqual({
     columnNumbers: { end: 0, ref: 1, start: 2 },
@@ -140,7 +140,7 @@ test('can query volvox.sort.gff3.gz.1', async () => {
   })
 
   const headerString = await f.getHeader()
-  expect(headerString[headerString.length - 1]).toEqual('\n')
+  expect(headerString.at(-1)).toEqual('\n')
   expect(headerString.length).toEqual(130)
 
   const lines = new RecordCollector()
@@ -173,7 +173,7 @@ test('can query gvcf.vcf.gz', async () => {
 
   const headerString = await f.getHeader()
   expect(headerString.length).toEqual(53)
-  expect(headerString[headerString.length - 1]).toEqual('\n')
+  expect(headerString.at(-1)).toEqual('\n')
 
   const lines = [] as string[]
   await f.getLines('ctgB', 0, Infinity, l => lines.push(l))
@@ -238,7 +238,7 @@ test('can query test.vcf.gz with a CSI index', async () => {
 
   const headerString = await f.getHeader()
   expect(headerString.length).toEqual(2560)
-  expect(headerString[headerString.length - 1]).toEqual('\n')
+  expect(headerString.at(-1)).toEqual('\n')
 
   const lines = new RecordCollector()
   await f.getLines('ctgB', 0, Infinity, lines.callback)
@@ -285,7 +285,7 @@ test('can fetch the entire header for a very large vcf header', async () => {
   const h = await f.getHeader()
   const lastBit = 'CN_105715_AGL\tCDC_QG-1_AGL\tCDC_SB-1_AGL\n'
   expect(h.slice(h.length - lastBit.length, h.length)).toEqual(lastBit)
-  expect(h[h.length - 1]).toEqual('\n')
+  expect(h.at(-1)).toEqual('\n')
   expect(h.length).toEqual(5315655)
 })
 

tsconfig.lint.json

@@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig",
+  "include": ["src", "test"]
+}