jsdoc3: devel, test added

Closes Homebrew/homebrew#35860.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/jsdoc3.rb

@@ -1,15 +1,33 @@
-require 'formula'
-
 class Jsdoc3 < Formula
-  homepage 'http://usejsdoc.org/'
-  head 'https://github.com/jsdoc3/jsdoc.git'
-  url 'https://github.com/jsdoc3/jsdoc/archive/v3.2.2.tar.gz'
-  sha1 '69d284a65a9b2b06c6e6454acb30976b41dea7b6'
+  homepage "http://usejsdoc.org/"
+  head "https://github.com/jsdoc3/jsdoc.git"
+  url "https://github.com/jsdoc3/jsdoc/archive/v3.2.2.tar.gz"
+  sha1 "69d284a65a9b2b06c6e6454acb30976b41dea7b6"
 
-  conflicts_with 'jsdoc-toolkit', :because => 'both install jsdoc'
+  devel do
+    url "https://github.com/jsdoc3/jsdoc/archive/v3.3.0-alpha13.tar.gz"
+    sha1 "7f0d094c8e61bbc0fbbf965209e8fe1d903352d4"
+    version "3.3.0-alpha13"
+  end
+
+  conflicts_with "jsdoc-toolkit", :because => "both install jsdoc"
 
   def install
-    libexec.install Dir['*']
-    bin.install_symlink libexec/'jsdoc'
+    libexec.install Dir["*"]
+    bin.install_symlink libexec/"jsdoc"
+  end
+
+  test do
+    (testpath/"test.js").write <<-EOS.undent
+      /**
+       * Represents a formula.
+       * @constructor
+       * @param {string} name - the name of the formula.
+       * @param {string} version - the version of the formula.
+       **/
+      function Formula(name, version) {}
+    EOS
+
+    system "#{bin}/jsdoc", "--verbose", "test.js"
   end
 end