Clean up tests

test/at-rule.test.ts

@@ -11,7 +11,9 @@ it('initializes with properties', () => {
 
 it('does not fall on childless at-rule', () => {
   let rule = new AtRule()
-  expect(rule.each(i => i)).not.toBeDefined()
+  rule.each(() => {
+    throw new Error('AtRule has no children')
+  })
 })
 
 it('creates nodes property on prepend()', () => {

test/lazy-result.test.ts

@@ -55,7 +55,9 @@ it('executes on finally callback', () => {
   let mockCallback = jest.fn()
   return new LazyResult(processor, 'a {}', {})
     .finally(mockCallback)
-    .then(() => expect(mockCallback).toHaveBeenCalledTimes(1))
+    .then(() => {
+      expect(mockCallback).toHaveBeenCalledTimes(1)
+    })
 })
 
 it('prints its object type', () => {

test/map.test.ts

@@ -18,7 +18,9 @@ function read (result: { css: string }): any {
 let dir = join(__dirname, 'map-fixtures')
 
 let doubler = postcss((css: Root) => {
-  css.walkDecls(decl => decl.parent?.prepend(decl.clone()))
+  css.walkDecls(decl => {
+    decl.parent?.prepend(decl.clone())
+  })
 })
 let lighter = postcss((css: Root) => {
   css.walkDecls(decl => {

test/node.test.ts

@@ -14,7 +14,7 @@ import postcss, {
 
 function stringify (node: AnyNode, builder: (str: string) => void) {
   if (node.type === 'rule') {
-    return builder(node.selector)
+    builder(node.selector)
   }
 }
 

test/postcss.test.ts

@@ -45,7 +45,9 @@ it('creates plugin', () => {
   jest.spyOn(console, 'warn').mockImplementation(() => true)
   let plugin = (postcss as any).plugin('test', (filter?: string) => {
     return (root: Root) => {
-      root.walkDecls(filter ?? 'two', i => i.remove())
+      root.walkDecls(filter ?? 'two', i => {
+        i.remove()
+      })
     }
   })
   expect(console.warn).toHaveBeenCalledTimes(1)

test/processor.test.ts

@@ -186,7 +186,9 @@ it('calls all plugins once', async () => {
 it('parses, converts and stringifies CSS', () => {
   expect(
     typeof new Processor([
-      (css: Root) => expect(css instanceof Root).toBe(true)
+      (css: Root) => {
+        expect(css instanceof Root).toBe(true)
+      }
     ]).process('a {}').css
   ).toEqual('string')
 })
@@ -328,7 +330,9 @@ it('throws parse error in async', async () => {
 
 it('throws error on sync method to async plugin', () => {
   let async = () => {
-    return new Promise<void>(resolve => resolve())
+    return new Promise<void>(resolve => {
+      resolve()
+    })
   }
   expect(() => {
     new Processor([async]).process('a{}').css