Restore ansible --version output (#55728)

* Add custom action class for version info
* Use args from CLI as prog for ArgumentParser object
* Make prog a required parameter of create_base_parser() and update all uses to pass in the newly required parameter.
* Add unit test for checking ansible --version
* Update other related unit tests

test/units/cli/test_adhoc.py

@@ -5,6 +5,7 @@ from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
 import pytest
+import re
 
 from ansible import context
 from ansible.cli.adhoc import AdHocCLI, display
@@ -13,8 +14,11 @@ from ansible.errors import AnsibleOptionsError
 
 def test_parse():
     """ Test adhoc parse"""
-    adhoc_cli = AdHocCLI([])
-    with pytest.raises(SystemExit) as exec_info:
+    with pytest.raises(ValueError, match='A non-empty list for args is required'):
+        adhoc_cli = AdHocCLI([])
+
+    adhoc_cli = AdHocCLI(['ansibletest'])
+    with pytest.raises(SystemExit):
         adhoc_cli.parse()
 
 
@@ -87,3 +91,23 @@ def test_run_no_extra_vars():
     with pytest.raises(SystemExit) as exec_info:
         adhoc_cli.parse()
     assert exec_info.value.code == 2
+
+
+def test_ansible_version(capsys, mocker):
+    adhoc_cli = AdHocCLI(args=['/bin/ansible', '--version'])
+    with pytest.raises(SystemExit):
+        adhoc_cli.run()
+    version = capsys.readouterr()
+    try:
+        version_lines = version.out.splitlines()
+    except AttributeError:
+        # Python 2.6 does return a named tuple, so get the first item
+        version_lines = version[0].splitlines()
+
+    assert len(version_lines) == 6, 'Incorrect number of lines in "ansible --version" output'
+    assert re.match('ansible [0-9.a-z]+$', version_lines[0]), 'Incorrect ansible version line in "ansible --version" output'
+    assert re.match('  config file = .*$', version_lines[1]), 'Incorrect config file line in "ansible --version" output'
+    assert re.match('  configured module search path = .*$', version_lines[2]), 'Incorrect module search path in "ansible --version" output'
+    assert re.match('  ansible python module location = .*$', version_lines[3]), 'Incorrect python module location in "ansible --version" output'
+    assert re.match('  executable location = .*$', version_lines[4]), 'Incorrect executable locaction in "ansible --version" output'
+    assert re.match('  python version = .*$', version_lines[5]), 'Incorrect python version in "ansible --version" output'

test/units/cli/test_console.py

@@ -27,12 +27,12 @@ from ansible.cli.console import ConsoleCLI
 
 class TestConsoleCLI(unittest.TestCase):
     def test_parse(self):
-        cli = ConsoleCLI([])
+        cli = ConsoleCLI(['ansible test'])
         cli.parse()
         self.assertTrue(cli.parser is not None)
 
     def test_module_args(self):
-        cli = ConsoleCLI([])
+        cli = ConsoleCLI(['ansible test'])
         cli.parse()
         res = cli.module_args('copy')
         self.assertTrue(cli.parser is not None)
@@ -42,7 +42,7 @@ class TestConsoleCLI(unittest.TestCase):
 
     @patch('ansible.utils.display.Display.display')
     def test_helpdefault(self, mock_display):
-        cli = ConsoleCLI([])
+        cli = ConsoleCLI(['ansible test'])
         cli.parse()
         cli.modules = set(['copy'])
         cli.helpdefault('copy')

test/units/cli/test_vault.py

@@ -40,7 +40,7 @@ class TestVaultCli(unittest.TestCase):
         self.tty_patcher.stop()
 
     def test_parse_empty(self):
-        cli = VaultCLI([])
+        cli = VaultCLI(['vaultcli'])
         self.assertRaises(SystemExit,
                           cli.parse)