Fixed an incorrect nesting error (#167)

* Fixed a bug that could cause regexp to issue an error

* Tests have been changed

* Fixed the error of incorrect processing of several rules

* Added a test for several rules with comments

Author: Ulyanov-programmer

index.js

@@ -75,35 +75,25 @@ function mergeSelectors(parent, child) {
 /**
  * Move a child and its preceding comment(s) to after "after"
  */
-function breakOut(child, parent) {
-  let changeParent = true
-  let lastNode = parent
-
-  for (let node of parent.nodes) {
-    if (!node.nodes) continue
-
-    let prevNode = node.prev()
-    if (prevNode?.type !== 'comment') continue
-
-    let parentRule = parent.toString()
+function breakOut(child, currentNode) {
+  if (child.prev()?.type !== 'comment') {
+    currentNode.after(child)
+    return child
+  }
 
-    /* Checking that the comment "describes" the rule following. Like this:
-      /* comment about the rule below /*
-      .rule {}
-    */
-    let regexp = /[*]\/ *\n.*{/
+  let prevNode = child.prev()
 
-    if (parentRule.match(regexp)) {
-      changeParent = false
-      lastNode.after(node).after(prevNode)
+  /* Checking that the comment "describes" the rule following. Like this:
+    /* comment about the rule below *\
+    .rule {}
+  */
+  let regexp = /[*]\/ *\n.*{/
 
-      lastNode = node
-    }
+  if (child.parent.toString().match(regexp)) {
+    currentNode.after(child).after(prevNode)
   }
-
-  // It is necessary if the above child has never been moved
-  if (changeParent) {
-    parent.after(child)
+  else {
+    currentNode.after(child)
   }
 
   return child

index.test.js

@@ -618,21 +618,20 @@ div {
     '/* Comment with ^ $ . | ? * + () */ div[data-roots-all^=1] * #id .class {}')
 })
 
-// !
-// test("Save the parent's comment with newline", () => {
-//   run(
-//     `
-// a { 
-//   /*i*/
-
-//   /*i2*/
-//   b {} 
-//   /*i3*/
-//   s {} 
-// }`,
-//     `a { /*i*/ } /*i2*/ a b {} /*i3*/ a s {}`
-//   )
-// })
+test("Save several rules with attached comments", () => {
+  run(
+    `
+a { 
+  /*i*/
+
+  /*i2*/
+  b {} 
+  /*i3*/
+  s {} 
+}`,
+    `a { /*i*/ } /*i2*/ a b {} /*i3*/ a s {}`
+  )
+})
 
 test("Save the parent's comment with newline", () => {
   run(
@@ -647,10 +646,12 @@ test("Save the parent's comment with newline", () => {
 
 test('Save the comments for the parent and child', () => {
   run(
-    `a { 
-    /*i*/ 
-    /*o*/
-    b {} }`,
+    `
+a { 
+  /*i*/ 
+  /*o*/
+  b {} 
+}`,
 
     `a { /*i*/ } /*o*/ a b {}`
   )