1 files changed, 51 insertions, 0 deletions
diff --git a/tests/test_argparse_custom.py b/tests/test_argparse_custom.py
new file mode 100644
index 00000000..85587d49
--- /dev/null
+++ b/tests/test_argparse_custom.py
@@ -0,0 +1,51 @@
+# flake8: noqa E302
+"""
+Unit/functional testing for argparse customizations in cmd2
+"""
+import pytest
+from cmd2.argparse_custom import Cmd2ArgParser
+
+
+def test_acarg_narg_empty_tuple():
+    with pytest.raises(ValueError) as excinfo:
+        parser = Cmd2ArgParser(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 = Cmd2ArgParser(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 = Cmd2ArgParser(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 = Cmd2ArgParser(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 = Cmd2ArgParser(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 = Cmd2ArgParser(prog='test')
+    parser.add_argument('tuple', nargs=(0, 3))
+
+
+def test_acarg_narg_tuple_zero_to_one():
+    parser = Cmd2ArgParser(prog='test')
+    parser.add_argument('tuple', nargs=(0, 1))