1 files changed, 76 insertions, 0 deletions
diff --git a/tests/test_acargparse.py b/tests/test_acargparse.py
new file mode 100644
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+++ b/tests/test_acargparse.py
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+"""
+Unit/functional testing for readline tab-completion functions in the cmd2.py module.
+
+These are primarily tests related to readline completer functions which handle tab-completion of cmd2/cmd commands,
+file system paths, and shell commands.
+
+Copyright 2017 Todd Leonhardt <todd.leonhardt@gmail.com>
+Released under MIT license, see LICENSE file
+"""
+import argparse
+import os
+import sys
+
+import cmd2
+from unittest import mock
+import pytest
+from AutoCompleter import ACArgumentParser
+
+# Prefer statically linked gnureadline if available (for macOS compatibility due to issues with libedit)
+try:
+    import gnureadline as readline
+except ImportError:
+    # Try to import readline, but allow failure for convenience in Windows unit testing
+    # Note: If this actually fails, you should install readline on Linux or Mac or pyreadline on Windows
+    try:
+        # noinspection PyUnresolvedReferences
+        import readline
+    except ImportError:
+        pass
+
+
+def test_acarg_narg_empty_tuple():
+    with pytest.raises(ValueError) as excinfo:
+        parser = ACArgumentParser(prog='test')
+        parser.add_argument('invalid_tuple', nargs=())
+    assert 'Ranged values for nargs must be a tuple of 2 integers' in str(excinfo.value)
+
+
+def test_acarg_narg_single_tuple():
+    with pytest.raises(ValueError) as excinfo:
+        parser = ACArgumentParser(prog='test')
+        parser.add_argument('invalid_tuple', nargs=(1,))
+    assert 'Ranged values for nargs must be a tuple of 2 integers' in str(excinfo.value)
+
+
+def test_acarg_narg_tuple_triple():
+    with pytest.raises(ValueError) as excinfo:
+        parser = ACArgumentParser(prog='test')
+        parser.add_argument('invalid_tuple', nargs=(1, 2, 3))
+    assert 'Ranged values for nargs must be a tuple of 2 integers' in str(excinfo.value)
+
+
+def test_acarg_narg_tuple_order():
+    with pytest.raises(ValueError) as excinfo:
+        parser = ACArgumentParser(prog='test')
+        parser.add_argument('invalid_tuple', nargs=(2, 1))
+    assert 'Invalid nargs range. The first value must be less than the second' in str(excinfo.value)
+
+
+def test_acarg_narg_tuple_negative():
+    with pytest.raises(ValueError) as excinfo:
+        parser = ACArgumentParser(prog='test')
+        parser.add_argument('invalid_tuple', nargs=(-1, 1))
+    assert 'Negative numbers are invalid for nargs range' in str(excinfo.value)
+
+
+def test_acarg_narg_tuple_zero_base():
+    parser = ACArgumentParser(prog='test')
+    parser.add_argument('tuple', nargs=(0, 3))
+
+
+def test_acarg_narg_tuple_zero_to_one():
+    parser = ACArgumentParser(prog='test')
+    parser.add_argument('tuple', nargs=(0, 1))
+
+