Wrote test that fails when runScripts: 'dangerously'

- See #392 for context
- Unintentionally discovered a potential bug: KEYS was never cleared

packages/global-jsdom/esm/index.mjs

@@ -50,7 +50,10 @@ export default function globalJsdom(html = defaultHtml, options = {}) {
   // add access to our jsdom instance
   global.$jsdom = jsdom
 
-  const cleanup = () => KEYS.forEach((key) => delete global[key])
+  const cleanup = () => {
+    KEYS.forEach((key) => delete global[key])
+    KEYS.length = 0
+  }
 
   document.destroy = cleanup
 

packages/global-jsdom/test/jsdom.test.cjs

@@ -4,7 +4,7 @@ describe('jsdom-global', () => {
   beforeEach(() => global.document && global.document.destroy && global.document.destroy())
   afterEach(() => global.document && global.document.destroy && global.document.destroy())
 
-  const expectedKeys = ['document', 'alert', 'requestAnimationFrame']
+  const expectedKeys = ['document', 'alert', 'requestAnimationFrame', 'NodeList']
 
   describe('initialization and cleanup', () => {
     it('works', () => {
@@ -16,6 +16,16 @@ describe('jsdom-global', () => {
     })
   })
 
+  describe('initialization and cleanup with `scripts: dangerously`', () => {
+    it('works', () => {
+      expectedKeys.forEach((k) => expect(global[k]).to.be.undefined)
+      const cleanup = jsdom(undefined, { runScripts: 'dangerously' })
+      expectedKeys.forEach((k) => expect(global[k]).to.exist)
+      cleanup()
+      expectedKeys.forEach((k) => expect(global[k]).to.be.undefined)
+    })
+  })
+
   describe('dom', () => {
     it('works', () => {
       jsdom()

packages/global-jsdom/test/jsdom.test.js

@@ -4,7 +4,7 @@ describe('jsdom-global', () => {
   beforeEach(() => global.document && global.document.destroy && global.document.destroy())
   afterEach(() => global.document && global.document.destroy && global.document.destroy())
 
-  const expectedKeys = ['document', 'alert', 'requestAnimationFrame']
+  const expectedKeys = ['document', 'alert', 'requestAnimationFrame', 'NodeList']
 
   describe('initialization and cleanup', () => {
     it('works', () => {
@@ -16,6 +16,16 @@ describe('jsdom-global', () => {
     })
   })
 
+  describe('initialization and cleanup with `scripts: dangerously`', () => {
+    it('works', () => {
+      expectedKeys.forEach((k) => expect(global[k]).to.be.undefined)
+      const cleanup = jsdom(undefined, { runScripts: 'dangerously' })
+      expectedKeys.forEach((k) => expect(global[k]).to.exist)
+      cleanup()
+      expectedKeys.forEach((k) => expect(global[k]).to.be.undefined)
+    })
+  })
+
   describe('dom', () => {
     it('works', () => {
       jsdom()

packages/global-jsdom/test/jsdom.test.mjs

@@ -5,7 +5,7 @@ describe('jsdom-global', () => {
   beforeEach(() => global.document && global.document.destroy && global.document.destroy())
   afterEach(() => global.document && global.document.destroy && global.document.destroy())
 
-  const expectedKeys = ['document', 'alert', 'requestAnimationFrame']
+  const expectedKeys = ['document', 'alert', 'requestAnimationFrame', 'NodeList']
 
   describe('initialization and cleanup', () => {
     it('works', () => {
@@ -17,6 +17,16 @@ describe('jsdom-global', () => {
     })
   })
 
+  describe('initialization and cleanup with `scripts: dangerously`', () => {
+    it('works', () => {
+      expectedKeys.forEach((k) => expect(global[k]).to.be.undefined)
+      const cleanup = jsdom(undefined, { runScripts: 'dangerously' })
+      expectedKeys.forEach((k) => expect(global[k]).to.exist)
+      cleanup()
+      expectedKeys.forEach((k) => expect(global[k]).to.be.undefined)
+    })
+  })
+
   describe('dom', () => {
     it('works', () => {
       jsdom()