fsw: fix test timeout

Cause three events so we don't exhaust the output and sleep 2 in between
to make sure more than one event has bubbled up.

Closes #367.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

Formula/fsw.rb

@@ -19,10 +19,18 @@ class Fsw < Formula
   end
 
   test do
-    io = IO.popen("fsw test")
-    (testpath/"test").write("foo")
-    assert_equal File.expand_path("test"), io.gets.strip
-    Process.kill "INT", io.pid
-    Process.wait io.pid
+    begin
+      io = IO.popen("fsw test")
+      (testpath/"test").write("foo")
+      sleep 2
+      rm testpath/"test"
+      sleep 2
+      (testpath/"test").write("foo")
+      sleep 2
+      assert_equal File.expand_path("test"), io.gets.strip
+    ensure
+      Process.kill "INT", io.pid
+      Process.wait io.pid
+    end
   end
 end