test: unit, integration and e2e tests

Task: MIL-002#6

tests/unit/presentation/test_password_manager_view_model.py

@@ -0,0 +1,121 @@
+import random
+
+from conftest import FakePasswordRepository
+
+from password_manager import constants
+from password_manager.application.use_cases import (
+    FindPasswordEntry,
+    GeneratePassword,
+    SavePasswordEntry,
+)
+from password_manager.presentation.features.password_manager import (
+    password_manager_view_model as view_model_module,
+)
+
+
+class FakeUi:
+    """Records clipboard writes and questions, answers with a fixed choice."""
+
+    def __init__(self, answer: bool = True) -> None:
+        self.answer = answer
+        self.clipboard: list[str] = []
+        self.questions: list[str] = []
+
+    def copy(self, text: str) -> None:
+        self.clipboard.append(text)
+
+    def confirm(self, message: str) -> bool:
+        self.questions.append(message)
+        return self.answer
+
+
+def _make(
+    repository: FakePasswordRepository, ui: FakeUi
+) -> view_model_module.PasswordManagerViewModel:
+    return view_model_module.PasswordManagerViewModel(
+        SavePasswordEntry(repository),
+        FindPasswordEntry(repository),
+        GeneratePassword(random.Random(3)),
+        ui.copy,
+        ui.confirm,
+    )
+
+
+def test_generate_password_copies_to_clipboard(
+    repository: FakePasswordRepository,
+) -> None:
+    ui = FakeUi()
+
+    password = _make(repository, ui).generate_password()
+
+    assert ui.clipboard == [password]
+
+
+def test_save_stores_and_clears_fields_after_confirmation(
+    repository: FakePasswordRepository,
+) -> None:
+    ui = FakeUi(answer=True)
+
+    result = _make(repository, ui).save("a.com", "me@x.org", "pw")
+
+    assert result is not None
+    assert not result.is_error
+    assert result.clear_fields
+    assert "a.com" in repository.entries
+    assert "me@x.org" in ui.questions[0]
+
+
+def test_save_does_nothing_when_user_cancels(
+    repository: FakePasswordRepository,
+) -> None:
+    result = _make(repository, FakeUi(answer=False)).save("a.com", "e", "pw")
+
+    assert result is None
+    assert repository.entries == {}
+
+
+def test_save_refuses_empty_field_without_asking(
+    repository: FakePasswordRepository,
+) -> None:
+    ui = FakeUi()
+
+    result = _make(repository, ui).save("", "e", "pw")
+
+    assert result is not None
+    assert result.is_error
+    assert result.message == constants.MESSAGE_EMPTY_FIELDS
+    assert not result.clear_fields
+    assert ui.questions == []
+
+
+def test_find_password_found(repository: FakePasswordRepository) -> None:
+    model = _make(repository, FakeUi())
+    model.save("a.com", "me@x.org", "pw")
+
+    result = model.find_password("a.com")
+
+    assert not result.is_error
+    assert result.message == constants.MESSAGE_DETAILS.format(
+        email="me@x.org", password="pw"
+    )
+
+
+def test_find_password_website_not_present(
+    repository: FakePasswordRepository,
+) -> None:
+    result = _make(repository, FakeUi()).find_password("b.com")
+
+    assert result.is_error
+    assert result.message == constants.MESSAGE_NO_DETAILS.format(website="b.com")
+
+
+def test_find_password_no_data_file() -> None:
+    model = _make(FakePasswordRepository(has_file=False), FakeUi())
+
+    assert model.find_password("a.com").message == constants.MESSAGE_NO_DATA_FILE
+
+
+def test_find_password_empty_website(repository: FakePasswordRepository) -> None:
+    result = _make(repository, FakeUi()).find_password(" ")
+
+    assert result.message == constants.MESSAGE_EMPTY_FIELDS