From 37ba6abb46fcb4aceff0ec640038860dad274513 Mon Sep 17 00:00:00 2001
From: Steven Schubiger <stsc@refcnt.org>
Date: Fri, 9 Aug 2013 23:40:56 +0200
Subject: Test failures

---
 test.pl | 51 +++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 49 insertions(+), 2 deletions(-)

diff --git a/test.pl b/test.pl
index a825ba7..7968097 100755
--- a/test.pl
+++ b/test.pl
@@ -2,12 +2,15 @@
 
 use strict;
 use warnings;
-use constant true => 1;
+use constant true  => 1;
+use constant false => 0;
 
 use File::Temp qw(tempfile tmpnam);
+use IPC::Open3 qw(open3);
+use Symbol qw(gensym);
 use Test::More;
 
-my $tests = 22;
+my $tests = 23;
 
 my %BUF_SIZE = (
    normal => 1024,
@@ -37,6 +40,50 @@ SKIP: {
 
     is(system("$program --help >/dev/null 2>&1"), 0, 'exit value for help screen');
 
+    my $run_program_fail = sub
+    {
+        my ($program, $args, $message) = @_;
+
+        my @args = split /\s+/, $args;
+
+        my $err = gensym;
+
+        my $pid = open3(gensym, gensym, $err, $program, @args);
+        waitpid($pid, 0);
+
+        my $output = do { local $/; <$err> };
+
+        return ($? >> 8 == 1 && $output =~ /$message/) ? true : false;
+    };
+
+    {
+        my $ok = true;
+
+        my $file = $write_to_tmpfile->('abc');
+
+        $ok &= $run_program_fail->($program, '--exclude-random=random', 'must be provided a color');
+        $ok &= $run_program_fail->($program, '--clean --clean-all',     'mutually exclusive');
+        $ok &= $run_program_fail->($program, '--clean file1 file2',     'more than one file');
+        $ok &= $run_program_fail->($program, '--clean-all file1 file2', 'more than one file');
+        $ok &= $run_program_fail->($program, '- file',                  'hyphen cannot be used as color string');
+        $ok &= $run_program_fail->($program, '-',                       'hyphen must be preceeded by color string');
+        $ok &= $run_program_fail->($program, "$file file",              'file cannot be used as color string');
+        $ok &= $run_program_fail->($program, "$file",                   'file must be preceeded by color string');
+        $ok &= $run_program_fail->($program, '/black',                  'foreground color missing');
+        $ok &= $run_program_fail->($program, 'white/',                  'background color missing');
+        $ok &= $run_program_fail->($program, 'white/black/yellow',      'one color pair allowed only');
+        $ok &= $run_program_fail->($program, 'y3llow',                  'cannot be made of non-alphabetic characters');
+        $ok &= $run_program_fail->($program, 'yEllow',                  'cannot be in mixed lower/upper case');
+        $ok &= $run_program_fail->($program, 'None',                    'cannot be bold');
+        $ok &= $run_program_fail->($program, 'white/Black',             'cannot be bold');
+
+        foreach my $color_pair (qw(random/none random/default none/random default/random)) {
+            $ok &= $run_program_fail->($program, $color_pair, 'cannot be combined with');
+        }
+
+        ok($ok, 'exit messages/values for failures');
+    }
+
     is(qx(echo    "hello world" | $program none/none), "hello world\n", 'line read from stdin with newline');
     is(qx(echo -n "hello world" | $program none/none), "hello world",   'line read from stdin without newline');
 
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