update tests to pass on node <20

.gitignore

@@ -1,3 +1,4 @@
 /.tap
 /node_modules
 /dist
+/docs

.prettierignore

@@ -1,10 +1,10 @@
 /node_modules
-/tap-snapshots
-/coverage
-/.nyc_output
-/benchmark
-/.github
-/scripts
-/CHANGELOG.md
 /docs
+/.tap
+/*.json
+/example
+/.github
 /dist
+/tap-snapshots
+/benchmark
+/.tshy

CHANGELOG.md

@@ -15,7 +15,7 @@
 ## 9.0.0
 
 - Use named export only, no default export.
-- Bring back minimal polyfill.  If this polyfill ends up being
+- Bring back minimal polyfill. If this polyfill ends up being
   used, then a warning is printed, as it is not safe for use
   outside of LRUCache.
 

README.md

@@ -278,10 +278,10 @@ For example:
 ```ts
 const cache = new LRUCache<string, any>({
   ttl: 100,
-  fetchMethod: async (url, oldValue, { signal }) =>  {
+  fetchMethod: async (url, oldValue, { signal }) => {
     const res = await fetch(url, { signal })
     return await res.json()
-  }
+  },
 })
 cache.set('https://example.com/', { some: 'data' })
 // 100ms go by...

test/avoid-memory-leak.ts

@@ -2,7 +2,7 @@
 
 // https://github.com/isaacs/node-lru-cache/issues/227
 
-import t, {Test} from 'tap'
+import t, { Test } from 'tap'
 import { expose } from './fixtures/expose.js'
 
 const maxSize = 100_000
@@ -28,7 +28,7 @@ const tryReq = (mod: string) => {
 const v8 = tryReq('v8')
 
 import { LRUCache } from '../dist/esm/index.js'
-import {createRequire} from 'module'
+import { createRequire } from 'module'
 const expectItemCount = Math.ceil(maxSize / itemSize)
 const max = expectItemCount + 1
 const keyRange = expectItemCount * 2

test/move-to-tail.ts

@@ -30,10 +30,10 @@ t.test('list integrity', { bail: true }, t => {
     t.test(msg, { bail: false }, t => {
       for (let i = 0; i < c.max; i++) {
         if (i !== exp.head) {
-          t.equal(exp.next[(exp.prev[i] as number)], i, 'n[p[i]] === i')
+          t.equal(exp.next[exp.prev[i] as number], i, 'n[p[i]] === i')
         }
         if (i !== exp.tail) {
-          t.equal(exp.prev[(exp.next[i] as number)], i, 'p[n[i]] === i')
+          t.equal(exp.prev[exp.next[i] as number], i, 'p[n[i]] === i')
         }
       }
       t.end()

test/warn-missing-ac.ts

@@ -1,6 +1,6 @@
-import {fileURLToPath} from 'url'
+import { createRequire } from 'module'
+import { fileURLToPath } from 'url'
 
-export {}
 const __filename = fileURLToPath(import.meta.url)
 const main = async () => {
   const { default: t } = await import('tap')
@@ -9,32 +9,46 @@ const main = async () => {
   // need to run both tests in parallel so we don't miss the close event
   t.jobs = 3
 
-  const warn = spawn(process.execPath, [
-    ...process.execArgv,
-    __filename,
-    'child',
-  ])
+  const argv = process.execArgv.filter(
+    a => !a.startsWith('--no-warnings')
+  )
+  const warn = spawn(
+    process.execPath,
+    [...argv, __filename, 'child'],
+    {
+      env: {
+        ...process.env,
+        NODE_OPTIONS: '',
+      },
+    }
+  )
   const warnErr: Buffer[] = []
   warn.stderr.on('data', c => warnErr.push(c))
 
   const noWarn = spawn(
     process.execPath,
-    [...process.execArgv, __filename, 'child'],
+    [...argv, __filename, 'child'],
     {
       env: {
         ...process.env,
         LRU_CACHE_IGNORE_AC_WARNING: '1',
+        NODE_OPTIONS: '',
       },
     }
   )
   const noWarnErr: Buffer[] = []
   noWarn.stderr.on('data', c => noWarnErr.push(c))
 
-  const noFetch = spawn(process.execPath, [
-    ...process.execArgv,
-    __filename,
-    'child-no-fetch',
-  ])
+  const noFetch = spawn(
+    process.execPath,
+    [...argv, __filename, 'child-no-fetch'],
+    {
+      env: {
+        ...process.env,
+        NODE_OPTIONS: '',
+      },
+    }
+  )
   const noFetchErr: Buffer[] = []
   noFetch.stderr.on('data', c => noFetchErr.push(c))
 
@@ -46,7 +60,10 @@ const main = async () => {
         r()
       })
     )
-    t.equal(Buffer.concat(noWarnErr).toString().trim(), '')
+    t.notMatch(
+      Buffer.concat(noWarnErr).toString().trim(),
+      'NO_ABORT_CONTROLLER'
+    )
   })
 
   t.test('no warning (because no fetch)', async t => {
@@ -57,7 +74,10 @@ const main = async () => {
         r()
       })
     )
-    t.equal(Buffer.concat(noFetchErr).toString().trim(), '')
+    t.notMatch(
+      Buffer.concat(noWarnErr).toString().trim(),
+      'NO_ABORT_CONTROLLER'
+    )
   })
 
   t.test('warning', async t => {
@@ -68,24 +88,29 @@ const main = async () => {
         r()
       })
     )
-    t.not(Buffer.concat(warnErr).toString().trim(), '')
+    t.match(
+      Buffer.concat(warnErr).toString().trim(),
+      /NO_ABORT_CONTROLLER/
+    )
   })
 }
 
 switch (process.argv[2]) {
   case 'child':
-    //@ts-ignore
+    //@ts-expect-error
+    process.emitWarning = null
+    //@ts-expect-error
     globalThis.AbortController = undefined
-    //@ts-ignore
+    //@ts-expect-error
     globalThis.AbortSignal = undefined
-    import('../dist/esm/index.js').then(({ LRUCache }) => {
-      new LRUCache({ max: 1, fetchMethod: async () => 1 }).fetch(1)
-    })
+    const req = createRequire(import.meta.url)
+    const { LRUCache } = req('../dist/commonjs/index.js')
+    new LRUCache({ max: 1, fetchMethod: async () => 1 }).fetch(1)
     break
   case 'child-no-fetch':
-    //@ts-ignore
+    //@ts-expect-error
     globalThis.AbortController = undefined
-    //@ts-ignore
+    //@ts-expect-error
     globalThis.AbortSignal = undefined
     import('../dist/esm/index.js')
     break