jp2a: real test added

Closes Homebrew/legacy-homebrew#35785.

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

Formula/jp2a.rb

@@ -1,19 +1,21 @@
-require 'formula'
-
 class Jp2a < Formula
-  homepage 'http://csl.sublevel3.org/jp2a/'
-  url 'https://downloads.sourceforge.net/project/jp2a/jp2a/1.0.6/jp2a-1.0.6.tar.gz'
-  sha1 '8d08a7f9428632c02351452067828af215afe2cf'
+  homepage "http://csl.sublevel3.org/jp2a/"
+  url "https://downloads.sourceforge.net/project/jp2a/jp2a/1.0.6/jp2a-1.0.6.tar.gz"
+  sha1 "8d08a7f9428632c02351452067828af215afe2cf"
+
+  option "without-check", "Skip compile-time tests."
 
-  depends_on 'jpeg'
+  depends_on "jpeg"
 
   def install
-    system "./configure", "--disable-debug", "--disable-dependency-tracking",
+    system "./configure", "--disable-debug",
+                          "--disable-dependency-tracking",
                           "--prefix=#{prefix}"
-    system "make install"
+    system "make", "test" if build.with? "check"
+    system "make", "install"
   end
 
   test do
-    system "#{bin}/jp2a", "-V"
+    system "#{bin}/jp2a", test_fixtures("test.jpg")
   end
 end