Add TODO tests for issue RexOps#1508 which check and describe how nee…

…ds() should behave, with regard to propagating args down to needed tasks, once issue RexOps#1508 will be fixed.

t/issue/1508.needs_arg-propagation.tau.t

@@ -0,0 +1,159 @@
+=head1 NAME 
+
+issue/1508.needs_arg-propagation.tau.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 = "Fix #1508: needs() should propogate current task 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;