test(probe): cover the boot loader download match

The xNBA loaders, the upstream iPXE loaders with the UEFI shim, the
POWER grub2 image and yaboot count as a boot loader download. Genesis
files, pxelinux.0, the POWER grub2 configuration and a similar-looking
name do not.

xCAT-test/unit/probe_utils_boot_loader_download.t

@@ -0,0 +1,36 @@
+#!/usr/bin/env perl
+# xcatprobe osdeploy marks the boot loader stage when a node fetches its loader over TFTP. The file
+# names below are the ones the TFTP log shows for each loader, and for downloads that are not one.
+use strict;
+use warnings;
+
+use FindBin;
+use lib "$FindBin::Bin/../../perl-xCAT";
+use lib "$FindBin::Bin/../../xCAT-probe/lib/perl";
+
+use Test::More;
+
+require probe_utils;
+
+my @loaders = (
+    'xcat/xnba.kpxe',
+    'xcat/xnba.efi',
+    'xcat/ipxe/i386/undionly.kpxe',
+    'xcat/ipxe/x86_64-sb/snponly-shim.efi',
+    'xcat/ipxe/x86_64-sb/snponly.efi',
+    '/boot/grub2/powerpc-ieee1275/core.elf',
+    '/yb/node/yaboot-cn01',
+);
+ok( probe_utils::boot_loader_download($_), "$_ is a boot loader download" ) for @loaders;
+
+my @others = (
+    'xcat/genesis.kernel.x86_64',
+    'xcat/genesis.fs.x86_64.gz',
+    'pxelinux.0',
+    '/boot/grub2/grub2.ppc',
+    'xcat/ipxeboot.kpxe',
+);
+ok( !probe_utils::boot_loader_download($_), "$_ is not a boot loader download" ) for @others;
+ok( !probe_utils::boot_loader_download(undef), 'no file name is not a boot loader download' );
+
+done_testing();