test(commands/init): add tests cases for the whole init process

Author: Lee-W

tests/commands/test_init_command.py

@@ -1,6 +1,40 @@
 from commitizen import commands
 
 
+class FakeQuestion:
+    def __init__(self, expected_return):
+        self.expected_return = expected_return
+
+    def ask(self):
+        return self.expected_return
+
+
+def test_init(tmpdir, mocker, config):
+    mocker.patch(
+        "questionary.select",
+        side_effect=[
+            FakeQuestion("pyproject.toml"),
+            FakeQuestion("cz_conventional_commits"),
+        ],
+    )
+    mocker.patch("questionary.confirm", return_value=FakeQuestion("y"))
+    mocker.patch("questionary.text", return_value=FakeQuestion("y"))
+    expected_config = (
+        "[tool.commitizen]\n"
+        'name = "cz_conventional_commits"\n'
+        'version = "0.0.1"\n'
+        'tag_format = "y"\n'
+    )
+
+    with tmpdir.as_cwd():
+        commands.Init(config)()
+
+        with open("pyproject.toml", "r") as toml_file:
+            config_data = toml_file.read()
+
+        assert config_data == expected_config
+
+
 def test_init_when_config_already_exists(config, capsys):
     # Set config path
     path = "tests/pyproject.toml"