ioke: test added

Closes Homebrew/legacy-homebrew#40021.

Signed-off-by: Dominyk Tiller <dominyktiller@gmail.com>

Formula/ioke.rb

@@ -1,9 +1,7 @@
-require 'formula'
-
 class Ioke < Formula
-  homepage 'http://ioke.org/'
-  url 'http://ioke.org/dist/ioke-P-ikj-0.4.0.tar.gz'
-  sha1 '1cf1512e1a845b64c8f839fed396f279afdc0ed9'
+  homepage "http://ioke.org/"
+  url "http://ioke.org/dist/ioke-P-ikj-0.4.0.tar.gz"
+  sha256 "701d24d8a8d0901cde64f11c79605c21d43cafbfb2bdd86765b664df13daec7c"
 
   def install
     # Remove windows files
@@ -12,15 +10,19 @@ def install
     prefix.install_metafiles
 
     # Install jars in libexec to avoid conflicts
-    libexec.install Dir['*']
+    libexec.install Dir["*"]
 
     # Point IOKE_HOME to libexec
-    inreplace libexec/'bin/ioke' do |s|
-      s.change_make_var! 'IOKE_HOME', libexec
+    inreplace libexec/"bin/ioke" do |s|
+      s.change_make_var! "IOKE_HOME", libexec
     end
 
-    bin.install_symlink libexec/'bin/ioke',
-                        libexec/'bin/ispec',
-                        libexec/'bin/dokgen'
+    bin.install_symlink libexec/"bin/ioke",
+                        libexec/"bin/ispec",
+                        libexec/"bin/dokgen"
+  end
+
+  test do
+    system "#{bin}/ioke", "-e", '"test" println'
   end
 end