Made output pipe to shell command featuer much more reliable

The ability to pipe the output of a cmd2 command to a shell command no longer depends on the presence of the "cat" shell command.

It now directly pipes the contents of a file as the stdin to the shell command.

1 files changed, 14 insertions, 7 deletions

diff --git a/tests/test_cmd2.py b/tests/test_cmd2.py
index adf47d31..efc82294 100644
--- a/tests/test_cmd2.py
+++ b/tests/test_cmd2.py
@@ -402,15 +402,22 @@ def test_input_redirection(base_app, request):
 
 
 def test_pipe_to_shell(base_app):
-    # Get help on help and pipe it's output to the input of the word count shell command
-    out = run_cmd(base_app, 'help help | wc')
-
     if sys.platform == "win32":
-        expected = normalize("1      11      71")
+        # Windows
+        # Get help menu and pipe it's output to the sort shell command
+        out = run_cmd(base_app, 'help | sort')
+        expected = normalize("""
+_relative_load  edit  history  pause  pyscript  run   set    shortcuts
+========================================
+cmdenvironment  help  load     py     quit      save  shell  show
+Documented commands (type help <topic>):""")
+        assert out == expected
     else:
-        expected = normalize("1      11      70")
-
-    assert out[0].strip() == expected[0].strip()
+        # Mac and Linux
+        # Get help on help and pipe it's output to the input of the word count shell command
+        out = run_cmd(base_app, 'help help | wc')
+        expected = normalize("1 11 70")
+        assert out[0].strip() == expected[0].strip()
 
 
 def test_send_to_paste_buffer(base_app):