From 80620f04b7094fb71a825b831174eeba99a88359 Mon Sep 17 00:00:00 2001
From: tbreisacher <tbreisacher@google.com>
Date: Thu, 11 May 2017 00:38:21 -0700
Subject: [PATCH] Check that @export annotations on getters/setters are
 preserved in transpilation.

Part of https://github.com/google/closure-compiler/issues/2474

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=155720252
---
 .../javascript/jscomp/Es6RewriteClass.java    | 14 +++--
 .../jscomp/Es6RewriteClassTest.java           | 62 +++++++++++++++++++
 2 files changed, 71 insertions(+), 5 deletions(-)

diff --git a/src/com/google/javascript/jscomp/Es6RewriteClass.java b/src/com/google/javascript/jscomp/Es6RewriteClass.java
index cef97e9b511..f5223fa6e5c 100644
--- a/src/com/google/javascript/jscomp/Es6RewriteClass.java
+++ b/src/com/google/javascript/jscomp/Es6RewriteClass.java
@@ -23,6 +23,7 @@
 import com.google.javascript.jscomp.CompilerOptions.LanguageMode;
 import com.google.javascript.rhino.IR;
 import com.google.javascript.rhino.JSDocInfo;
+import com.google.javascript.rhino.JSDocInfo.Visibility;
 import com.google.javascript.rhino.JSDocInfoBuilder;
 import com.google.javascript.rhino.JSTypeExpression;
 import com.google.javascript.rhino.Node;
@@ -143,7 +144,7 @@ private void visitClass(final NodeTraversal t, final Node classNode, final Node
               && (member.getBooleanProp(Node.COMPUTED_PROP_GETTER)
                   || member.getBooleanProp(Node.COMPUTED_PROP_SETTER)))
           || (member.isGetterDef() || member.isSetterDef())) {
-        visitComputedPropInClass(member, metadata);
+        visitNonMethodMember(member, metadata);
       } else if (member.isMemberFunctionDef() && member.getString().equals("constructor")) {
         ctorJSDocInfo = member.getJSDocInfo();
         constructor = member.getFirstChild().detach();
@@ -160,7 +161,7 @@ private void visitClass(final NodeTraversal t, final Node classNode, final Node
             "Unexpected class member:", member);
         Preconditions.checkState(!member.getBooleanProp(Node.COMPUTED_PROP_VARIABLE),
             "Member variables should have been transpiled earlier:", member);
-        visitClassMember(member, metadata);
+        visitMethod(member, metadata);
       }
     }
 
@@ -366,7 +367,10 @@ private void addToDefinePropertiesObject(ClassDeclarationMetadata metadata, Node
     prop.useSourceInfoIfMissingFromForTree(member);
   }
 
-  private void visitComputedPropInClass(Node member, ClassDeclarationMetadata metadata) {
+  /**
+   * Visits class members other than simple methods: Getters, setters, and computed properties.
+   */
+  private void visitNonMethodMember(Node member, ClassDeclarationMetadata metadata) {
     if (member.isComputedProp() && member.isStaticMember()) {
       cannotConvertYet(member, "Static computed property");
       return;
@@ -400,6 +404,7 @@ private void visitComputedPropInClass(Node member, ClassDeclarationMetadata meta
       jsDoc.recordType(typeExpr);
       if (member.getJSDocInfo() != null && member.getJSDocInfo().isExport()) {
         jsDoc.recordExport();
+        jsDoc.recordVisibility(Visibility.PUBLIC);
       }
       if (member.isStaticMember() && !member.isComputedProp()) {
         jsDoc.recordNoCollapse();
@@ -412,8 +417,7 @@ private void visitComputedPropInClass(Node member, ClassDeclarationMetadata meta
    * Handles transpilation of a standard class member function. Getters, setters, and the
    * constructor are not handled here.
    */
-  private void visitClassMember(
-      Node member, ClassDeclarationMetadata metadata) {
+  private void visitMethod(Node member, ClassDeclarationMetadata metadata) {
     Node qualifiedMemberAccess = getQualifiedMemberAccess(
         member,
         NodeUtil.newQName(compiler, metadata.fullClassName),
diff --git a/test/com/google/javascript/jscomp/Es6RewriteClassTest.java b/test/com/google/javascript/jscomp/Es6RewriteClassTest.java
index 0fca5e38200..f65ed0fc96a 100644
--- a/test/com/google/javascript/jscomp/Es6RewriteClassTest.java
+++ b/test/com/google/javascript/jscomp/Es6RewriteClassTest.java
@@ -1577,6 +1577,68 @@ public void testEs5GettersAndSettersClassesWithTypes() {
         CONFLICTING_GETTER_SETTER_TYPE);
   }
 
+  public void testEs5GetterWithExport() {
+    setLanguageOut(LanguageMode.ECMASCRIPT5);
+    test(
+        "class C { /** @export @return {string} */ get foo() {} }",
+        LINE_JOINER.join(
+            "/**",
+            " * @constructor @struct",
+            " */",
+            "let C = function() {}",
+            "",
+            "/**",
+            " * @export",
+            " * @type {string}",
+            " */",
+            "C.prototype.foo;",
+            "",
+            "$jscomp.global.Object.defineProperties(C.prototype, {",
+            "  foo: {",
+            "    configurable: true,",
+            "    enumerable: true,",
+            "",
+            "    /**",
+            "     * @return {string}",
+            "     * @this {C}",
+            "     * @export",
+            "     */",
+            "    get: function() {},",
+            "  }",
+            "});"));
+  }
+
+  public void testEs5SetterWithExport() {
+    setLanguageOut(LanguageMode.ECMASCRIPT5);
+    test(
+        "class C { /** @export @param {string} x */ set foo(x) {} }",
+        LINE_JOINER.join(
+            "/**",
+            " * @constructor @struct",
+            " */",
+            "let C = function() {}",
+            "",
+            "/**",
+            " * @export",
+            " * @type {string}",
+            " */",
+            "C.prototype.foo;",
+            "",
+            "$jscomp.global.Object.defineProperties(C.prototype, {",
+            "  foo: {",
+            "    configurable: true,",
+            "    enumerable: true,",
+            "",
+            "    /**",
+            "     * @param {string} x",
+            "     * @this {C}",
+            "     * @export",
+            "     */",
+            "    set: function(x) {},",
+            "  }",
+            "});"));
+  }
+
   /**
    * @bug 20536614
    */