Ensure nesting plugins can receive options (#7016)

* fix: options for nesting / nested plugins

* add tests to ensure passing options to postcss plugin works

Co-authored-by: Robin Malfait <malfait.robin@gmail.com>

nesting/plugin.js

@@ -14,7 +14,10 @@ module.exports = function nesting(opts = postcssNested) {
     })
 
     let plugin = (() => {
-      if (typeof opts === 'function') {
+      if (
+        typeof opts === 'function' ||
+        (typeof opts === 'object' && opts?.hasOwnProperty('postcssPlugin'))
+      ) {
         return opts
       }
 

tests/postcss-plugins/nesting/index.test.js

@@ -74,7 +74,7 @@ it('should default to the bundled postcss-nested plugin (no options)', async ()
   `)
 })
 
-it('should default to the bundled postcss-nested plugin (empty ooptions)', async () => {
+it('should default to the bundled postcss-nested plugin (empty options)', async () => {
   let input = css`
     .foo {
       color: black;
@@ -97,6 +97,29 @@ it('should default to the bundled postcss-nested plugin (empty ooptions)', async
   `)
 })
 
+it('should be possible to use postcss-nested plugin with options', async () => {
+  let input = css`
+    .foo {
+      color: black;
+      @screen md {
+        color: blue;
+      }
+    }
+  `
+
+  expect(await run(input, postcssNested({ noIsPseudoSelector: true }))).toMatchCss(css`
+    .foo {
+      color: black;
+    }
+
+    @media screen(md) {
+      .foo {
+        color: blue;
+      }
+    }
+  `)
+})
+
 test('@screen rules are replaced with media queries', async () => {
   let input = css`
     .foo {