testcommon: add require_mods method and use it

This cuts down on lines of code in individual test cases and
fixes some misnamed error messages by using "$0" consistently.

This will also provide us with a method of swapping out
dependencies which provide equivalent functionality (e.g
"Xapian" SWIG can replace "Search::Xapian" XS bindings).

1 files changed, 15 insertions, 1 deletions

diff --git a/lib/PublicInbox/TestCommon.pm b/lib/PublicInbox/TestCommon.pm
index 372cafa6..9680b94c 100644
--- a/lib/PublicInbox/TestCommon.pm
+++ b/lib/PublicInbox/TestCommon.pm
@@ -8,7 +8,7 @@ use parent qw(Exporter);
 use Fcntl qw(FD_CLOEXEC F_SETFD F_GETFD :seek);
 use POSIX qw(dup2);
 use IO::Socket::INET;
-our @EXPORT = qw(tmpdir tcp_server tcp_connect require_git
+our @EXPORT = qw(tmpdir tcp_server tcp_connect require_git require_mods
         run_script start_script key2sub);
 
 sub tmpdir (;$) {
@@ -59,6 +59,20 @@ sub require_git ($;$) {
         1;
 }
 
+sub require_mods {
+        my @mods = @_;
+        my $maybe = pop @mods if $mods[-1] =~ /\A[0-9]+\z/;
+        my @need;
+        for my $mod (@mods) {
+                eval "require $mod";
+                push @need, $mod if $@;
+        }
+        return unless @need;
+        my $m = join(', ', @need)." missing for $0";
+        Test::More::skip($m, $maybe) if $maybe;
+        Test::More::plan(skip_all => $m)
+}
+
 sub key2script ($) {
         my ($key) = @_;
         return $key if (index($key, '/') >= 0);