Add "TODO" tests related to issue RexOps#1508

The added tests check that the needs() function
propagates run-time task arguments (%params and @Args)
from the calling task down to the "needed" tasks.

CHANGES:
=============
new file: t/issue/1508.t

HOW TO TEST :
=============

$ prove -v t/issue/1508.t   # for this issue
$ prove t/**/*.t            # for non-regression

While the related tests remain marked as "TODO",
they will not report failures during normal test runs.

To see their true pass/fail status, you have to pass
the '-v' option to `prove`.

t/issue/1508.t

@@ -0,0 +1,167 @@
+
+=head1 NAME 
+
+issue/1508.t  - Check that the `needs()` function correctly propogates run-time task arguments
+
+=head1 DESCRIPTION
+
+Check that the `needs()` function does indeed correctly propogate 
+run-time task arguments (%params and @args) from the calling task down to the "needed" tasks.
+
+=head1 DETAILS
+
+  * AUTHOR / DATE : [tabulon]@[2021-09-26]
+  * RELATES-TO    : [github issue #1508](https://github.com/RexOps/Rex/issues/1508#issue-1007457392)
+  * INSPIRED from : t/needs.t
+
+=cut
+
+use Test::More;
+use Rex::Commands;
+
+{
+
+  package T; # Helper package (for cutting down boilerplate in tests)
+  use Storable;
+
+  sub track_taskrun {
+    my %opts = ref $_[-1] eq 'HASH'
+      ? %{
+      ;
+      pop
+      }
+      : ();
+    my $argv    = $opts{argv};
+    my @prereqs = (@_);
+    for (@prereqs) {
+      my $file = "${_}.txt";
+      Storable::store( $argv, $file );
+    }
+  }
+
+  sub check_needed {
+    my %opts = ref $_[-1] eq 'HASH'
+      ? %{
+      ;
+      pop
+      }
+      : ();
+    my $argv      = $opts{argv};
+    my $do_unlink = delete $opts{unlink} // 1;
+    my @prereqs   = (@_);
+
+    for (@prereqs) {
+      my $file = "${_}.txt";
+
+      -f "$file" or die;
+      my $propagated_argv = Storable::retrieve("$file");
+      Test::More::_deep_check( $propagated_argv, $argv ) or die;
+
+      unlink("$file") if ($do_unlink);
+    }
+  }
+}
+
+{
+
+  package MyTest;
+  use strict;
+  use warnings;
+  use Rex::Commands;
+
+  $::QUIET = 1;
+
+  task test1 => sub {
+    T::track_taskrun( test1 => { argv => \@_ } );
+  };
+
+  task test2 => sub {
+    T::track_taskrun( test2 => { argv => \@_ } );
+  };
+
+  1;
+}
+
+{
+
+  package Nested::Module;
+
+  use strict;
+  use warnings;
+
+  use Rex::Commands;
+
+  task test => sub {
+    T::track_taskrun( test => { argv => \@_ } );
+  };
+}
+
+{
+
+  package Rex::Module;
+
+  use strict;
+  use warnings;
+
+  use Rex::Commands;
+
+  task test => sub {
+    T::track_taskrun( test => { argv => \@_ } );
+  };
+}
+
+task test => sub {
+  needs MyTest;
+
+  T::check_needed( $_, { argv => \@_ } ) for (qw/test1 test2/);
+};
+
+task test2 => sub {
+  needs MyTest "test2";
+
+  T::check_needed( $_, { argv => \@_ } ) for (qw/test2/);
+};
+
+task test3 => sub {
+  needs "test4";
+
+  T::check_needed( $_, { argv => \@_ } ) for (qw/test4/);
+};
+
+task test4 => sub {
+  T::track_taskrun( test4 => { argv => \@_ } );
+};
+
+task test5 => sub {
+  needs Nested::Module test;
+
+  T::check_needed( $_, { argv => \@_ } ) for (qw/test/);
+};
+
+task test6 => sub {
+  needs Rex::Module "test";
+
+  T::check_needed( $_, { argv => \@_ } ) for (qw/test /);
+};
+
+TODO: {
+  local $TODO = "Issue 1508: The needs() function should propogate parameters/args";
+
+  my $task_list = Rex::TaskList->create;
+  my $run_list  = Rex::RunList->instance;
+  $run_list->parse_opts(qw/test test2 test3 test5 test6/);
+
+  for my $task ( $run_list->tasks ) {
+    my $name = $task->name;
+    my %prms = ( "${name}_greet" => "Hello ${name}" );
+    my @args = ( "${name}.arg.0", "${name}.arg.1", "${name}.arg.2" );
+
+    $task_list->run($task);
+
+    my @summary = $task_list->get_summary;
+    is_deeply $summary[-1]->{exit_code}, 0, $task->name;
+    $run_list->increment_current_index;
+  }
+}
+
+done_testing;