Stabilize comments on ObjectTypeAnnotation (#1214)

src/comments.js

@@ -219,6 +219,7 @@ function attach(comments, ast, text, options) {
         handleExportNamedDeclarationComments(enclosingNode, comment) ||
         handleOnlyComments(enclosingNode, ast, comment, isLastComment) ||
         handleClassMethodComments(enclosingNode, comment) ||
+        handleTypeAliasComments(enclosingNode, followingNode, comment) ||
         handleVariableDeclaratorComments(enclosingNode, followingNode, comment)
       ) {
         // We're good
@@ -734,6 +735,14 @@ function handleClassMethodComments(enclosingNode, comment) {
   return false;
 }
 
+function handleTypeAliasComments(enclosingNode, followingNode, comment) {
+  if (enclosingNode && enclosingNode.type === "TypeAlias") {
+    addLeadingComment(enclosingNode, comment);
+    return true;
+  }
+  return false;
+}
+
 function handleVariableDeclaratorComments(
   enclosingNode,
   followingNode,

tests/flow_comments/__snapshots__/jsfmt.spec.js.snap

@@ -29,3 +29,67 @@ const beep = (data /*: Object*/) => {};
 const beep = (data /*: Object*/, secondData /*: Object*/) => {};
 
 `;
+
+exports[`object_type_annotation.js 1`] = `
+type Props = // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+{
+  isPlaying: boolean,
+};
+
+type Props = { // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};
+
+type Props = {
+  // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+type Props = {
+  isPlaying: boolean
+};
+
+type Props = {
+  // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};
+
+type Props = {
+  // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};
+
+`;
+
+exports[`object_type_annotation.js 2`] = `
+type Props = // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+{
+  isPlaying: boolean,
+};
+
+type Props = { // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};
+
+type Props = {
+  // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+type Props = {
+  isPlaying: boolean
+};
+
+type Props = {
+  // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};
+
+type Props = {
+  // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};
+
+`;

tests/flow_comments/object_type_annotation.js

@@ -0,0 +1,13 @@
+type Props = // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+{
+  isPlaying: boolean,
+};
+
+type Props = { // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};
+
+type Props = {
+  // (DispatchProps & StateProps); WHY DON'T YOU WORK FLOW!!!!!!!!!
+  isPlaying: boolean
+};