Improve TAP Subtest test

Author: exodist

t/integration/tapsubtest.t

@@ -19,7 +19,10 @@ yath(
             \@lines,
             subset {
                 item '[  PASS  ]  job 1 +~buffered';
-                item '[  PASS  ]  job 1   + buffered ok';
+                item '[  PASS  ]  job 1   +~nested';
+                item '[  PASS  ]  job 1   | + buffered ok';
+                item '[  PLAN  ]  job 1   | | Expected assertions: 1';
+                item '            job 1   | ^';
                 item '[  PLAN  ]  job 1   | Expected assertions: 1';
                 item '            job 1   ^';
                 item '[  PLAN  ]  job 1   Expected assertions: 1';

t/integration/tapsubtest/test.tx

@@ -1,9 +1,16 @@
-# HARNESS-NO-STREAM
-use Test2::V0;
-use Test2::Tools::Subtest qw/subtest_buffered/;
+# vi: ft=perl
+use strict;
+use warnings;
 
-subtest_buffered buffered => sub {
-    ok(1, "buffered ok");
-};
+print <<EOT;
+ok 1 - buffered {
+    ok 1 - nested {
+        ok 1 - buffered ok
+        1..1
+    }
+    1..1
+}
+1..1
+EOT
 
-done_testing;
+exit 0;