add terraform fmt unit test

tests/unit/plugins/modules/test_terraform_fmt.py

@@ -0,0 +1,55 @@
+"""unit test for terraform fmt module"""
+__metaclass__ = type
+
+
+import json
+import pytest
+from mschuchard.general.plugins.modules import terraform_fmt
+from mschuchard.general.tests.unit.plugins.modules import utils
+
+
+def test_terraform_fmt_defaults(capfd):
+    """test terraform fmt with defaults"""
+    utils.set_module_args({})
+    with pytest.raises(SystemExit, match='0'):
+        terraform_fmt.main()
+
+    stdout, stderr = capfd.readouterr()
+    assert not stderr
+
+    info = json.loads(stdout)
+    assert 'fmt' in info['command']
+    assert '-no-color' in info['command']
+    assert '-list=false' in info['command']
+    assert '' ==  info['stdout']
+
+
+def test_terraform_fmt_config_diff_write(capfd):
+    """test terraform fmt with config diff write"""
+    utils.set_module_args({'diff': True, 'write': False, 'config_dir': str(utils.fixtures_dir())})
+    with pytest.raises(SystemExit, match='0'):
+        terraform_fmt.main()
+
+    stdout, stderr = capfd.readouterr()
+    assert not stderr
+
+    info = json.loads(stdout)
+    assert f"-chdir={str(utils.fixtures_dir())}" in info['command']
+    assert '-diff' in info['command']
+    assert '-write=false' in info['command']
+    assert '' == info['stdout']
+
+
+def test_terraform_fmt_check_recursive(capfd):
+    """test terraform validate with check recursive"""
+    utils.set_module_args({'check': True, 'recursive': True})
+    with pytest.raises(SystemExit, match='0'):
+        terraform_fmt.main()
+
+    stdout, stderr = capfd.readouterr()
+    assert not stderr
+
+    info = json.loads(stdout)
+    assert '-check' in info['command']
+    assert '-recursive' in info['command']
+    assert '' == info['stdout']