usbredir: add test

usbredir.rb

@@ -3,6 +3,7 @@ class Usbredir < Formula
   homepage "https://www.spice-space.org"
   url "https://www.spice-space.org/download/usbredir/usbredir-0.8.0.tar.bz2"
   sha256 "87bc9c5a81c982517a1bec70dc8d22e15ae197847643d58f20c0ced3c38c5e00"
+  revision 1
 
   depends_on "libtool" => :build
   depends_on "pkg-config" => :build
@@ -10,7 +11,7 @@ class Usbredir < Formula
   depends_on "libusb"
 
   def install
-    #https://stackoverflow.com/questions/15860127/how-to-configure-tcp-keepalive-under-mac-os-x
+    # https://stackoverflow.com/questions/15860127/how-to-configure-tcp-keepalive-under-mac-os-x
     inreplace "usbredirserver/usbredirserver.c" do |s|
       s.gsub! "SOL_TCP", "IPPROTO_TCP"
       s.gsub! "TCP_KEEPIDLE", "TCP_KEEPALIVE"
@@ -20,4 +21,18 @@ class Usbredir < Formula
                           "--prefix=#{prefix}"
     system "make", "install"
   end
+
+  test do
+    (testpath/"test.cpp").write <<~EOS
+      #include <usbredirparser.h>
+      int main() {
+        return usbredirparser_create() ? 0 : 1;
+      }
+    EOS
+    system ENV.cc, "test.cpp",
+                   "-L#{lib}",
+                   "-lusbredirparser",
+                   "-o", "test"
+    system "./test"
+  end
 end