fix: Set correct node-end position for empty values with comments (#413)

Author: eemeli

src/compose/compose-node.ts

@@ -22,6 +22,7 @@ interface Props {
   comment: string
   anchor: SourceToken | null
   tag: SourceToken | null
+  end: number
 }
 
 const CN = { composeNode, composeEmptyNode }
@@ -93,7 +94,7 @@ export function composeEmptyNode(
   offset: number,
   before: Token[] | undefined,
   pos: number | null,
-  { spaceBefore, comment, anchor, tag }: Props,
+  { spaceBefore, comment, anchor, tag, end }: Props,
   onError: ComposeErrorHandler
 ) {
   const token: FlowScalar = {
@@ -109,7 +110,10 @@ export function composeEmptyNode(
       onError(anchor, 'BAD_ALIAS', 'Anchor cannot be an empty string')
   }
   if (spaceBefore) node.spaceBefore = true
-  if (comment) node.comment = comment
+  if (comment) {
+    node.comment = comment
+    node.range[2] = end
+  }
   return node
 }
 

tests/doc/errors.js

@@ -122,6 +122,24 @@ describe('block collections', () => {
       }
     ])
   })
+
+  test('key after long comment on empty value (eemeli/yaml#413)', () => {
+    const doc = YAML.parseDocument(source`
+      one:
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+        # large block of text, large block of text, large block of text, large block of text, large block of text,
+      two: b
+    `)
+    expect(doc.errors).toMatchObject([])
+  })
 })
 
 describe('flow collections', () => {

tests/doc/parse.js

@@ -324,7 +324,7 @@ describe('empty(ish) nodes', () => {
   test('empty node position', () => {
     const doc = YAML.parseDocument('\r\na: # 123\r\n')
     const empty = doc.contents.items[0].value
-    expect(empty.range).toEqual([5, 5, 5])
+    expect(empty.range).toEqual([5, 5, 12])
   })
 
   test('parse an empty string as null', () => {