test(commit_command): testing '--allow-empty' flag for cz commit

Signed-off-by: Adrian DC <[email protected]>

Author: Dranaxel

Diff for: tests/commands/test_commit_command.py

@@ -324,6 +324,54 @@ def test_commit_when_nothing_to_commit(config, mocker: MockFixture):
     assert "No files added to staging!" in str(excinfo.value)
 
 
+@pytest.mark.usefixtures("staging_is_clean")
+def test_commit_with_allow_empty(config, mocker: MockFixture):
+    prompt_mock = mocker.patch("questionary.prompt")
+    prompt_mock.return_value = {
+        "prefix": "feat",
+        "subject": "user created",
+        "scope": "",
+        "is_breaking_change": False,
+        "body": "closes #21",
+        "footer": "",
+    }
+
+    commit_mock = mocker.patch("commitizen.git.commit")
+    commit_mock.return_value = cmd.Command("success", "", b"", b"", 0)
+    success_mock = mocker.patch("commitizen.out.success")
+
+    commands.Commit(config, {"allow_empty": True})()
+
+    commit_mock.assert_called_with(
+        "feat: user created\n\ncloses #21", args="--allow-empty"
+    )
+    success_mock.assert_called_once()
+
+
+@pytest.mark.usefixtures("staging_is_clean")
+def test_commit_with_signoff_and_allow_empty(config, mocker: MockFixture):
+    prompt_mock = mocker.patch("questionary.prompt")
+    prompt_mock.return_value = {
+        "prefix": "feat",
+        "subject": "user created",
+        "scope": "",
+        "is_breaking_change": False,
+        "body": "closes #21",
+        "footer": "",
+    }
+
+    commit_mock = mocker.patch("commitizen.git.commit")
+    commit_mock.return_value = cmd.Command("success", "", b"", b"", 0)
+    success_mock = mocker.patch("commitizen.out.success")
+
+    commands.Commit(config, {"allow_empty": True, "signoff": True})()
+
+    commit_mock.assert_called_with(
+        "feat: user created\n\ncloses #21", args="-s --allow-empty"
+    )
+    success_mock.assert_called_once()
+
+
 @pytest.mark.usefixtures("staging_is_clean")
 def test_commit_when_customized_expected_raised(config, mocker: MockFixture, capsys):
     _err = ValueError()

Diff for: tests/commands/test_commit_command/test_commit_command_shows_description_when_use_help_option.txt

@@ -1,6 +1,6 @@
 usage: cz commit [-h] [--retry] [--no-retry] [--dry-run]
                  [--write-message-to-file FILE_PATH] [-s] [-a]
-                 [-l MESSAGE_LENGTH_LIMIT]
+                 [-l MESSAGE_LENGTH_LIMIT] [--allow-empty]
 
 create new commit
 
@@ -18,3 +18,4 @@ options:
                         not told Git about are not affected.
   -l, --message-length-limit MESSAGE_LENGTH_LIMIT
                         length limit of the commit message; 0 for no limit
+  --allow-empty         Allow to create a commit without staging changes