From 60143a457f61b7bcf3f72f18b9be027410148ef0 Mon Sep 17 00:00:00 2001
From: Jeff Williams <jeffrey.l.williams@gmail.com>
Date: Sun, 16 Jul 2017 18:48:40 -0700
Subject: [PATCH] support `preserve` tag (Closure Compiler only) (#605)

---
 lib/jsdoc/tag/dictionary/definitions.js |  2 ++
 test/fixtures/preservetag.js            |  2 ++
 test/specs/tags/preservetag.js          | 43 +++++++++++++++++++++++++
 3 files changed, 47 insertions(+)
 create mode 100644 test/fixtures/preservetag.js
 create mode 100644 test/specs/tags/preservetag.js

diff --git a/lib/jsdoc/tag/dictionary/definitions.js b/lib/jsdoc/tag/dictionary/definitions.js
index 5e357ab7..983a664e 100644
--- a/lib/jsdoc/tag/dictionary/definitions.js
+++ b/lib/jsdoc/tag/dictionary/definitions.js
@@ -931,6 +931,8 @@ exports.closureTags = {
     polymerBehavior: {
         onTagged: ignore
     },
+    // Closure Compiler only
+    preserve: cloneTagDef(baseTags.license),
     private: {
         canHaveType: true,
         onTagged: function(doclet, tag) {
diff --git a/test/fixtures/preservetag.js b/test/fixtures/preservetag.js
new file mode 100644
index 00000000..8d07d7f8
--- /dev/null
+++ b/test/fixtures/preservetag.js
@@ -0,0 +1,2 @@
+/** @preserve My cool license goes here. */
+var x;
diff --git a/test/specs/tags/preservetag.js b/test/specs/tags/preservetag.js
new file mode 100644
index 00000000..f1f42c48
--- /dev/null
+++ b/test/specs/tags/preservetag.js
@@ -0,0 +1,43 @@
+'use strict';
+
+describe('@preserve tag', function() {
+    var env = require('jsdoc/env');
+    var logger = require('jsdoc/util/logger');
+
+    var allowUnknownTags = Boolean(env.conf.tags.allowUnknownTags);
+
+    beforeEach(function() {
+        env.conf.tags.allowUnknownTags = false;
+        spyOn(logger, 'error');
+    });
+
+    afterEach(function() {
+        jasmine.restoreTagDictionary();
+        env.conf.tags.allowUnknownTags = allowUnknownTags;
+    });
+
+    describe('JSDoc tags', function() {
+        beforeEach(function() {
+            jasmine.replaceTagDictionary('jsdoc');
+        });
+
+        it('should not recognize the @preserve tag', function() {
+            jasmine.getDocSetFromFile('test/fixtures/preservetag.js');
+
+            expect(logger.error).toHaveBeenCalled();
+        });
+    });
+
+    describe('Closure Compiler tags', function() {
+        beforeEach(function() {
+            jasmine.replaceTagDictionary('closure');
+        });
+
+        it('should set the doclet\'s `license` property to the tag value', function() {
+            var docSet = jasmine.getDocSetFromFile('test/fixtures/preservetag.js');
+            var x = docSet.getByLongname('x')[0];
+
+            expect(x.license).toBe('My cool license goes here.');
+        });
+    });
+});