add test case for GH#30

t/default_template.t

@@ -0,0 +1,36 @@
+use strict;
+use warnings;
+use Test::More tests => 3;
+use Test::Mojo;
+
+use Mojolicious::Lite;
+
+# Tell Mojolicious we want to load the TT renderer plugin
+app->plugin(
+    tt_renderer => {
+        template_options => {
+            # These options are specific to TT
+            INCLUDE_PATH => 'templates',
+            COMPILE_DIR  => 'templates_c',
+            COMPILE_EXT  => '.ttc',
+            # ... anything else to be passed on to TT should go here
+        },
+    }
+);
+
+app->renderer->default_handler('tt');
+
+get '/' => sub {
+    die 'foo';
+};
+
+my $t = Test::Mojo->new;
+
+$t->get_ok('/')
+    ->status_is(500)
+    ->content_isnt('');
+
+__DATA__
+
+@@ index.html.tt
+anything