Add back --quiet and test pt-trend.

t/pt-trend/basics.t

@@ -0,0 +1,33 @@
+#!/usr/bin/env perl
+
+BEGIN {
+   die "The PERCONA_TOOLKIT_BRANCH environment variable is not set.\n"
+      unless $ENV{PERCONA_TOOLKIT_BRANCH} && -d $ENV{PERCONA_TOOLKIT_BRANCH};
+   unshift @INC, "$ENV{PERCONA_TOOLKIT_BRANCH}/lib";
+};
+
+use strict;
+use warnings FATAL => 'all';
+use English qw(-no_match_vars);
+use Test::More tests => 1;
+
+use PerconaTest;
+require "$trunk/bin/pt-trend";
+
+
+my $in   = "$trunk/t/lib/samples/slowlogs";
+my $out  = "t/pt-trend/samples/";
+my @args = ();
+
+ok(
+   no_diff(
+      sub { pt_trend::main(@args, "$in/slow053.txt") },
+      "$out/slow053.txt",
+   ),
+   "Analysis for slow053.txt"
+);
+
+# #############################################################################
+# Done.
+# #############################################################################
+exit;