X-Git-Url: https://plomlompom.com/repos/%7B%7Bprefix%7D%7D/move_up?a=blobdiff_plain;ds=sidebyside;f=tests%2Ftodos.py;h=dd57ee4c0c28cfc73d3d9c08dd6c18ab2dd7cd7b;hb=HEAD;hp=93b34d197f33aebbd5b096619c3804ca0b8f75ce;hpb=a4ca74f81ae42abe27cf6dbab7ef18c850db72c2;p=plomtask

diff --git a/tests/todos.py b/tests/todos.py
index 93b34d1..d84bb70 100644
--- a/tests/todos.py
+++ b/tests/todos.py
@@ -1,60 +1,571 @@
 """Test Todos module."""
-from tests.utils import TestCaseWithDB, TestCaseWithServer
-from plomtask.todos import Todo
-from plomtask.days import Day
-from plomtask.processes import Process
-from plomtask.exceptions import NotFoundException
+from typing import Any
+from tests.utils import (TestCaseSansDB, TestCaseWithDB, TestCaseWithServer,
+                         Expected)
+from plomtask.todos import Todo, TodoNode
+from plomtask.processes import Process, ProcessStep
+from plomtask.conditions import Condition
+from plomtask.exceptions import (NotFoundException, BadFormatException,
+                                 HandledException)
 
 
-class TestsWithDB(TestCaseWithDB):
-    """Tests not requiring DB setup."""
+class TestsWithDB(TestCaseWithDB, TestCaseSansDB):
+    """Tests requiring DB, but not server setup.
 
-    def test_Todo_by_date(self) -> None:
-        """Test creation and findability of Todos."""
-        day1 = Day('2024-01-01')
-        day2 = Day('2024-01-02')
-        process1 = Process(None)
-        todo1 = Todo(None, process1, False, day1)
-        with self.assertRaises(NotFoundException):
-            todo1.save(self.db_conn)
-        process1.save_without_steps(self.db_conn)
-        todo1.save(self.db_conn)
-        todo2 = Todo(None, process1, False, day1)
-        todo2.save(self.db_conn)
+    NB: We subclass TestCaseSansDB too, to run any tests there that due to any
+    Todo requiring a _saved_ Process wouldn't run without a DB.
+    """
+    checked_class = Todo
+    default_init_kwargs = {'process': None, 'is_done': False,
+                           'date': '2024-01-01'}
+
+    def setUp(self) -> None:
+        super().setUp()
+        self.date1 = '2024-01-01'
+        self.date2 = '2024-01-02'
+        self.proc = Process(None)
+        self.proc.save(self.db_conn)
+        self.cond1 = Condition(None)
+        self.cond1.save(self.db_conn)
+        self.cond2 = Condition(None)
+        self.cond2.save(self.db_conn)
+        self.default_init_kwargs['process'] = self.proc
+
+    def test_Todo_init(self) -> None:
+        """Test creation of Todo and what they default to."""
+        process = Process(None)
         with self.assertRaises(NotFoundException):
-            Todo.by_date(self.db_conn, day1.date),
-        day1.save(self.db_conn)
-        day2.save(self.db_conn)
-        self.assertEqual(Todo.by_date(self.db_conn, day1.date), [todo1, todo2])
-        self.assertEqual(Todo.by_date(self.db_conn, day2.date), [])
-        self.assertEqual(Todo.by_date(self.db_conn, 'foo'), [])
+            Todo(None, process, False, self.date1)
+        process.save(self.db_conn)
+        assert isinstance(self.cond1.id_, int)
+        assert isinstance(self.cond2.id_, int)
+        process.set_condition_relations(self.db_conn,
+                                        [self.cond1.id_, self.cond2.id_], [],
+                                        [self.cond1.id_], [self.cond2.id_])
+        todo_no_id = Todo(None, process, False, self.date1)
+        self.assertEqual(todo_no_id.conditions, [self.cond1, self.cond2])
+        self.assertEqual(todo_no_id.enables, [self.cond1])
+        self.assertEqual(todo_no_id.disables, [self.cond2])
+        todo_yes_id = Todo(5, process, False, self.date1)
+        self.assertEqual(todo_yes_id.conditions, [])
+        self.assertEqual(todo_yes_id.enables, [])
+        self.assertEqual(todo_yes_id.disables, [])
+
+    def test_Todo_by_date(self) -> None:
+        """Test findability of Todos by date."""
+        t1 = Todo(None, self.proc, False, self.date1)
+        t1.save(self.db_conn)
+        t2 = Todo(None, self.proc, False, self.date1)
+        t2.save(self.db_conn)
+        self.assertEqual(Todo.by_date(self.db_conn, self.date1), [t1, t2])
+        self.assertEqual(Todo.by_date(self.db_conn, self.date2), [])
+        with self.assertRaises(BadFormatException):
+            self.assertEqual(Todo.by_date(self.db_conn, 'foo'), [])
+
+    def test_Todo_by_date_range_with_limits(self) -> None:
+        """Test .by_date_range_with_limits."""
+        self.check_by_date_range_with_limits('day')
+
+    def test_Todo_on_conditions(self) -> None:
+        """Test effect of Todos on Conditions."""
+        assert isinstance(self.cond1.id_, int)
+        assert isinstance(self.cond2.id_, int)
+        todo = Todo(None, self.proc, False, self.date1)
+        todo.save(self.db_conn)
+        todo.set_condition_relations(self.db_conn, [], [],
+                                     [self.cond1.id_], [self.cond2.id_])
+        todo.is_done = True
+        self.assertEqual(self.cond1.is_active, True)
+        self.assertEqual(self.cond2.is_active, False)
+        todo.is_done = False
+        self.assertEqual(self.cond1.is_active, True)
+        self.assertEqual(self.cond2.is_active, False)
+
+    def test_Todo_children(self) -> None:
+        """Test Todo.children relations."""
+        todo_1 = Todo(None, self.proc, False, self.date1)
+        todo_2 = Todo(None, self.proc, False, self.date1)
+        todo_2.save(self.db_conn)
+        with self.assertRaises(HandledException):
+            todo_1.add_child(todo_2)
+        todo_1.save(self.db_conn)
+        todo_3 = Todo(None, self.proc, False, self.date1)
+        with self.assertRaises(HandledException):
+            todo_1.add_child(todo_3)
+        todo_3.save(self.db_conn)
+        todo_1.add_child(todo_3)
+        todo_1.save(self.db_conn)
+        assert isinstance(todo_1.id_, int)
+        todo_retrieved = Todo.by_id(self.db_conn, todo_1.id_)
+        self.assertEqual(todo_retrieved.children, [todo_3])
+        with self.assertRaises(BadFormatException):
+            todo_3.add_child(todo_1)
+
+    def test_Todo_conditioning(self) -> None:
+        """Test Todo.doability conditions."""
+        assert isinstance(self.cond1.id_, int)
+        todo_1 = Todo(None, self.proc, False, self.date1)
+        todo_1.save(self.db_conn)
+        todo_2 = Todo(None, self.proc, False, self.date1)
+        todo_2.save(self.db_conn)
+        todo_2.add_child(todo_1)
+        with self.assertRaises(BadFormatException):
+            todo_2.is_done = True
+        todo_1.is_done = True
+        todo_2.is_done = True
+        todo_2.is_done = False
+        todo_2.set_condition_relations(
+                self.db_conn, [self.cond1.id_], [], [], [])
+        with self.assertRaises(BadFormatException):
+            todo_2.is_done = True
+        self.cond1.is_active = True
+        todo_2.is_done = True
+
+    def test_Todo_step_tree(self) -> None:
+        """Test self-configuration of TodoStepsNode tree for Day view."""
+
+        def todo_node_as_dict(node: TodoNode) -> dict[str, object]:
+            return {'todo': node.todo.id_, 'seen': node.seen,
+                    'children': [todo_node_as_dict(c) for c in node.children]}
+
+        todo_1 = Todo(None, self.proc, False, self.date1)
+        todo_1.save(self.db_conn)
+        assert isinstance(todo_1.id_, int)
+        # test minimum
+        node_0 = TodoNode(todo_1, False, [])
+        cmp_0_dict = todo_node_as_dict(todo_1.get_step_tree(set()))
+        cmp_1_dict = todo_node_as_dict(node_0)
+        self.assertEqual(cmp_0_dict, cmp_1_dict)
+        # test non_emtpy seen_todo does something
+        node_0.seen = True
+        cmp_0_dict = todo_node_as_dict(todo_1.get_step_tree({todo_1.id_}))
+        cmp_1_dict = todo_node_as_dict(node_0)
+        self.assertEqual(cmp_0_dict, cmp_1_dict)
+        # test child shows up
+        todo_2 = Todo(None, self.proc, False, self.date1)
+        todo_2.save(self.db_conn)
+        assert isinstance(todo_2.id_, int)
+        todo_1.add_child(todo_2)
+        node_2 = TodoNode(todo_2, False, [])
+        node_0.children = [node_2]
+        node_0.seen = False
+        cmp_0_dict = todo_node_as_dict(todo_1.get_step_tree(set()))
+        cmp_1_dict = todo_node_as_dict(node_0)
+        self.assertEqual(cmp_0_dict, cmp_1_dict)
+        # test child shows up with child
+        todo_3 = Todo(None, self.proc, False, self.date1)
+        todo_3.save(self.db_conn)
+        assert isinstance(todo_3.id_, int)
+        todo_2.add_child(todo_3)
+        node_3 = TodoNode(todo_3, False, [])
+        node_2.children = [node_3]
+        cmp_0_dict = todo_node_as_dict(todo_1.get_step_tree(set()))
+        cmp_1_dict = todo_node_as_dict(node_0)
+        self.assertEqual(cmp_0_dict, cmp_1_dict)
+        # test same todo can be child-ed multiple times at different locations
+        todo_1.add_child(todo_3)
+        node_4 = TodoNode(todo_3, True, [])
+        node_0.children += [node_4]
+        cmp_0_dict = todo_node_as_dict(todo_1.get_step_tree(set()))
+        cmp_1_dict = todo_node_as_dict(node_0)
+        self.assertEqual(cmp_0_dict, cmp_1_dict)
+
+    def test_Todo_ensure_children(self) -> None:
+        """Test parenthood guarantees of Todo.ensure_children."""
+        assert isinstance(self.proc.id_, int)
+        proc2 = Process(None)
+        proc2.save(self.db_conn)
+        assert isinstance(proc2.id_, int)
+        proc3 = Process(None)
+        proc3.save(self.db_conn)
+        assert isinstance(proc3.id_, int)
+        proc4 = Process(None)
+        proc4.save(self.db_conn)
+        assert isinstance(proc4.id_, int)
+        # make proc4 step of proc3
+        step = ProcessStep(None, proc3.id_, proc4.id_, None)
+        proc3.set_steps(self.db_conn, [step])
+        # give proc2 three steps; 2× proc1, 1× proc3
+        step1 = ProcessStep(None, proc2.id_, self.proc.id_, None)
+        step2 = ProcessStep(None, proc2.id_, self.proc.id_, None)
+        step3 = ProcessStep(None, proc2.id_, proc3.id_, None)
+        proc2.set_steps(self.db_conn, [step1, step2, step3])
+        # test mere creation does nothing
+        todo_ignore = Todo(None, proc2, False, self.date1)
+        todo_ignore.save(self.db_conn)
+        self.assertEqual(todo_ignore.children, [])
+        # test create_with_children on step-less does nothing
+        todo_1 = Todo(None, self.proc, False, self.date1)
+        todo_1.save(self.db_conn)
+        todo_1.ensure_children(self.db_conn)
+        self.assertEqual(todo_1.children, [])
+        self.assertEqual(len(Todo.all(self.db_conn)), 2)
+        # test create_with_children adopts and creates, and down tree too
+        todo_2 = Todo(None, proc2, False, self.date1)
+        todo_2.save(self.db_conn)
+        todo_2.ensure_children(self.db_conn)
+        self.assertEqual(3, len(todo_2.children))
+        self.assertEqual(todo_1, todo_2.children[0])
+        self.assertEqual(self.proc, todo_2.children[2].process)
+        self.assertEqual(proc3, todo_2.children[1].process)
+        todo_3 = todo_2.children[1]
+        self.assertEqual(len(todo_3.children), 1)
+        self.assertEqual(todo_3.children[0].process, proc4)
+
+
+class ExpectedGetTodo(Expected):
+    """Builder of expectations for GET /todo."""
+
+    def __init__(self,
+                 todo_id: int,
+                 *args: Any, **kwargs: Any) -> None:
+        self._fields = {'todo': todo_id,
+                        'steps_todo_to_process': []}
+        super().__init__(*args, **kwargs)
+
+    def recalc(self) -> None:
+        """Update internal dictionary by subclass-specific rules."""
+
+        def walk_steps(step: dict[str, Any]) -> None:
+            if not step['todo']:
+                proc_id = step['process']
+                cands = self.as_ids(
+                        [t for t in todos if proc_id == t['process_id']
+                         and t['id'] in self._fields['todo_candidates']])
+                self._fields['adoption_candidates_for'][str(proc_id)] = cands
+            for child in step['children']:
+                walk_steps(child)
+
+        super().recalc()
+        self.lib_wipe('Day')
+        todos = self.lib_all('Todo')
+        procs = self.lib_all('Process')
+        conds = self.lib_all('Condition')
+        self._fields['todo_candidates'] = self.as_ids(
+                [t for t in todos if t['id'] != self._fields['todo']])
+        self._fields['process_candidates'] = self.as_ids(procs)
+        self._fields['condition_candidates'] = self.as_ids(conds)
+        self._fields['adoption_candidates_for'] = {}
+        for step in self._fields['steps_todo_to_process']:
+            walk_steps(step)
+
+    @staticmethod
+    def step_as_dict(node_id: int,
+                     children: list[dict[str, object]],
+                     process: int | None = None,
+                     todo: int | None = None,
+                     fillable: bool = False,
+                     ) -> dict[str, object]:
+        """Return JSON of TodoOrProcStepsNode to expect."""
+        return {'node_id': node_id,
+                'children': children,
+                'process': process,
+                'fillable': fillable,
+                'todo': todo}
 
 
 class TestsWithServer(TestCaseWithServer):
     """Tests against our HTTP server/handler (and database)."""
 
-    def test_do_POST_todo(self) -> None:
-        """Test Todo posting of POST /day."""
-        form_data = {'title': '', 'description': '', 'effort': 1}
-        self.check_post(form_data, '/process?id=', 302, '/')
-        self.check_post(form_data, '/process?id=', 302, '/')
-        process1 = Process.by_id(self.db_conn, 1)
-        process2 = Process.by_id(self.db_conn, 2)
-        form_data = {'comment': ''}
-        self.check_post(form_data, '/day?date=2024-01-01', 302, '/')
-        self.assertEqual(Todo.by_date(self.db_conn, '2024-01-01'), [])
-        form_data['new_todo'] = str(process1.id_)
-        self.check_post(form_data, '/day?date=2024-01-01', 302, '/')
-        todos = Todo.by_date(self.db_conn, '2024-01-01')
-        self.assertEqual(1, len(todos))
-        todo1 = todos[0]
-        self.assertEqual(todo1.id_, 1)
-        self.assertEqual(todo1.process.id_, process1.id_)
-        self.assertEqual(todo1.is_done, False)
-        form_data['new_todo'] = str(process2.id_)
-        self.check_post(form_data, '/day?date=2024-01-01', 302, '/')
-        todos = Todo.by_date(self.db_conn, '2024-01-01')
-        todo1 = todos[1]
-        self.assertEqual(todo1.id_, 2)
-        self.assertEqual(todo1.process.id_, process2.id_)
-        self.assertEqual(todo1.is_done, False)
+    def _post_exp_todo(
+            self, id_: int, payload: dict[str, Any], exp: Expected) -> None:
+        self.check_post(payload, f'/todo?id={id_}')
+        exp.set_todo_from_post(id_, payload)
+
+    def test_basic_fail_POST_todo(self) -> None:
+        """Test basic malformed/illegal POST /todo requests."""
+        self.post_exp_process([], {}, 1)
+        # test we cannot just POST into non-existing Todo
+        self.check_post({}, '/todo', 404)
+        self.check_post({}, '/todo?id=FOO', 400)
+        self.check_post({}, '/todo?id=0', 404)
+        self.check_post({}, '/todo?id=1', 404)
+        # test malformed values on existing Todo
+        self.post_exp_day([], {'new_todo': [1]})
+        for name in [
+                'adopt', 'effort', 'make_full', 'make_empty', 'step_filler',
+                'conditions', 'disables', 'blockers', 'enables']:
+            self.check_post({name: 'x'}, '/todo?id=1', 400, '/todo')
+        for prefix in ['make_empty_', 'make_full_']:
+            for suffix in ['', 'x', '1.1']:
+                self.check_post({'step_filler': f'{prefix}{suffix}'},
+                                '/todo?id=1', 400, '/todo')
+
+    def test_basic_POST_todo(self) -> None:
+        """Test basic POST /todo manipulations."""
+        exp = ExpectedGetTodo(1)
+        self.post_exp_process([exp], {'calendarize': 0}, 1)
+        self.post_exp_day([exp], {'new_todo': [1]})
+        # test posting naked entity at first changes nothing
+        self.check_json_get('/todo?id=1', exp)
+        self.check_post({}, '/todo?id=1')
+        self.check_json_get('/todo?id=1', exp)
+        # test posting doneness, comment, calendarization, effort
+        todo_post = {'is_done': 1, 'calendarize': 1,
+                     'comment': 'foo', 'effort': 2.3}
+        self._post_exp_todo(1, todo_post, exp)
+        self.check_json_get('/todo?id=1', exp)
+        # test implicitly un-setting (only) comment by empty post
+        self.check_post({}, '/todo?id=1')
+        exp.lib_get('Todo', 1)['comment'] = ''
+        self.check_json_get('/todo?id=1', exp)
+        # test effort post can be explicitly unset by "effort":"" post
+        self.check_post({'effort': ''}, '/todo?id=1')
+        exp.lib_get('Todo', 1)['effort'] = None
+        self.check_json_get('/todo?id=1', exp)
+        # test Condition posts
+        c1_post = {'title': 'foo', 'description': 'oof', 'is_active': 0}
+        c2_post = {'title': 'bar', 'description': 'rab', 'is_active': 1}
+        self.post_exp_cond([exp], 1, c1_post, '?id=1', '?id=1')
+        self.post_exp_cond([exp], 2, c2_post, '?id=2', '?id=2')
+        self.check_json_get('/todo?id=1', exp)
+        todo_post = {'conditions': [1], 'disables': [1],
+                     'blockers': [2], 'enables': [2]}
+        self._post_exp_todo(1, todo_post, exp)
+        self.check_json_get('/todo?id=1', exp)
+
+    def test_POST_todo_deletion(self) -> None:
+        """Test deletions via POST /todo."""
+        exp = ExpectedGetTodo(1)
+        self.post_exp_process([exp], {}, 1)
+        # test failure of deletion on non-existing Todo
+        self.check_post({'delete': ''}, '/todo?id=2', 404, '/')
+        # test deletion of existing Todo
+        self.post_exp_day([exp], {'new_todo': [1]})
+        self.check_post({'delete': ''}, '/todo?id=1', 302, '/')
+        self.check_get('/todo?id=1', 404)
+        exp.lib_del('Todo', 1)
+        # test deletion of adopted Todo
+        self.post_exp_day([exp], {'new_todo': [1]})
+        self.post_exp_day([exp], {'new_todo': [1]})
+        self.check_post({'adopt': 2}, '/todo?id=1')
+        self.check_post({'delete': ''}, '/todo?id=2', 302, '/')
+        exp.lib_del('Todo', 2)
+        self.check_get('/todo?id=2', 404)
+        self.check_json_get('/todo?id=1', exp)
+        # test deletion of adopting Todo
+        self.post_exp_day([exp], {'new_todo': [1]})
+        self.check_post({'adopt': 2}, '/todo?id=1')
+        self.check_post({'delete': ''}, '/todo?id=1', 302, '/')
+        exp.set('todo', 2)
+        exp.lib_del('Todo', 1)
+        self.check_json_get('/todo?id=2', exp)
+        # test cannot delete Todo with comment or effort
+        self.check_post({'comment': 'foo'}, '/todo?id=2')
+        self.check_post({'delete': ''}, '/todo?id=2', 500, '/')
+        self.check_post({'effort': 5}, '/todo?id=2')
+        self.check_post({'delete': ''}, '/todo?id=2', 500, '/')
+        # test deletion via effort < 0, but only if deletable
+        self.check_post({'effort': -1, 'comment': 'foo'}, '/todo?id=2')
+        self.check_post({}, '/todo?id=2')
+        self.check_get('/todo?id=2', 404)
+
+    def test_POST_todo_adoption(self) -> None:
+        """Test adoption via POST /todo with "adopt"."""
+        # post two Todos to Day, have first adopt second
+        exp = ExpectedGetTodo(1)
+        self.post_exp_process([exp], {}, 1)
+        self.post_exp_day([exp], {'new_todo': [1]})
+        self.post_exp_day([exp], {'new_todo': [1]})
+        self._post_exp_todo(1, {'adopt': 2}, exp)
+        exp.set('steps_todo_to_process', [exp.step_as_dict(1, [], todo=2)])
+        self.check_json_get('/todo?id=1', exp)
+        # test Todo un-adopting by just not sending an adopt
+        self._post_exp_todo(1, {}, exp)
+        exp.set('steps_todo_to_process', [])
+        self.check_json_get('/todo?id=1', exp)
+        # test fail on trying to adopt non-existing Todo
+        self.check_post({'adopt': 3}, '/todo?id=1', 404)
+        # test cannot self-adopt
+        self.check_post({'adopt': 1}, '/todo?id=1', 400)
+        # test cannot do 1-step circular adoption
+        self._post_exp_todo(2, {'adopt': 1}, exp)
+        self.check_post({'adopt': 2}, '/todo?id=1', 400)
+        # test cannot do 2-step circular adoption
+        self.post_exp_day([exp], {'new_todo': [1]})
+        self._post_exp_todo(3, {'adopt': 2}, exp)
+        self.check_post({'adopt': 3}, '/todo?id=1', 400)
+        # test can adopt Todo into ProcessStep chain via its Process (with key
+        # 'step_filler' equivalent to single-element 'adopt' if intable)
+        self.post_exp_process([exp], {}, 2)
+        self.post_exp_process([exp], {}, 3)
+        self.post_exp_process([exp], {'new_top_step': [2, 3]}, 1)
+        exp.lib_set('ProcessStep', [exp.procstep_as_dict(1, 1, 2),
+                                    exp.procstep_as_dict(2, 1, 3)])
+        step1_proc2 = exp.step_as_dict(1, [], 2, None, True)
+        step2_proc3 = exp.step_as_dict(2, [], 3, None, True)
+        exp.set('steps_todo_to_process', [step1_proc2, step2_proc3])
+        self.post_exp_day([exp], {'new_todo': [2]})
+        self.post_exp_day([exp], {'new_todo': [3]})
+        self.check_json_get('/todo?id=1', exp)
+        self._post_exp_todo(1, {'step_filler': 5, 'adopt': [4]}, exp)
+        step1_proc2 = exp.step_as_dict(1, [], 2, 4, True)
+        step2_proc3 = exp.step_as_dict(2, [], 3, 5, True)
+        exp.set('steps_todo_to_process', [step1_proc2, step2_proc3])
+        self.check_json_get('/todo?id=1', exp)
+        # test 'ignore' values for 'step_filler' are ignored, and intable
+        # 'step_filler' values are interchangeable with those of 'adopt'
+        todo_post = {'adopt': 5, 'step_filler': ['ignore', 4]}
+        self.check_post(todo_post, '/todo?id=1')
+        self.check_json_get('/todo?id=1', exp)
+        # test cannot adopt into non-top-level elements of chain, instead
+        # creating new top-level steps when adopting of respective Process
+        self.post_exp_process([exp], {}, 4)
+        self.post_exp_process([exp], {'new_top_step': 4, 'step_of': [1]}, 3)
+        exp.lib_set('ProcessStep', [exp.procstep_as_dict(3, 3, 4)])
+        step3_proc4 = exp.step_as_dict(3, [], 4, None, True)
+        step2_proc3 = exp.step_as_dict(2, [step3_proc4], 3, 5, True)
+        exp.set('steps_todo_to_process', [step1_proc2, step2_proc3])
+        self.post_exp_day([exp], {'new_todo': [4]})
+        self._post_exp_todo(1, {'adopt': [4, 5, 6]}, exp)
+        step4_todo6 = exp.step_as_dict(4, [], None, 6, False)
+        exp.set('steps_todo_to_process', [step1_proc2, step2_proc3,
+                                          step4_todo6])
+        self.check_json_get('/todo?id=1', exp)
+
+    def test_POST_todo_make_full(self) -> None:
+        """Test creation and adoption via POST /todo with "make_full"."""
+        # create chain of Processes
+        exp = ExpectedGetTodo(1)
+        self.post_exp_process([exp], {}, 1)
+        for i in range(1, 4):
+            self.post_exp_process([exp], {'new_top_step': i}, i+1)
+        exp.lib_set('ProcessStep', [exp.procstep_as_dict(1, 2, 1),
+                                    exp.procstep_as_dict(2, 3, 2),
+                                    exp.procstep_as_dict(3, 4, 3)])
+        step3_proc1 = exp.step_as_dict(3, [], 1, None, False)
+        step2_proc2 = exp.step_as_dict(2, [step3_proc1], 2, None, False)
+        step1_proc3 = exp.step_as_dict(1, [step2_proc2], 3, None, True)
+        exp.set('steps_todo_to_process', [step1_proc3])
+        # post (childless) Todo of chain end, then make_full on next in line
+        self.post_exp_day([exp], {'new_todo': [4]})
+        self.check_post({'step_filler': 'make_full_3'}, '/todo?id=1')
+        exp.set_todo_from_post(4, {'process_id': 1})
+        exp.set_todo_from_post(3, {'process_id': 2, 'children': [4]})
+        exp.set_todo_from_post(2, {'process_id': 3, 'children': [3]})
+        exp.set_todo_from_post(1, {'process_id': 4, 'children': [2]})
+        step3_proc1 = exp.step_as_dict(3, [], 1, 4, True)
+        step2_proc2 = exp.step_as_dict(2, [step3_proc1], 2, 3, True)
+        step1_proc3 = exp.step_as_dict(1, [step2_proc2], 3, 2, True)
+        exp.set('steps_todo_to_process', [step1_proc3])
+        self.check_json_get('/todo?id=1', exp)
+        # make new chain next to expected, find steps_todo_to_process extended,
+        # expect existing Todo demanded by new chain be adopted into new chain
+        self.check_post({'make_full': 2, 'adopt': [2]}, '/todo?id=1')
+        exp.set_todo_from_post(5, {'process_id': 2, 'children': [4]})
+        exp.set_todo_from_post(1, {'process_id': 4, 'children': [2, 5]})
+        step5_todo4 = exp.step_as_dict(5, [], None, 4)
+        step4_todo5 = exp.step_as_dict(4, [step5_todo4], None, 5)
+        exp.set('steps_todo_to_process', [step1_proc3, step4_todo5])
+        self.check_json_get('/todo?id=1', exp)
+        # fail on trying to call make_full on non-existing Process
+        self.check_post({'make_full': 5}, '/todo?id=1', 404)
+
+    def test_POST_todo_make_empty(self) -> None:
+        """Test creation and adoption via POST /todo with "make_empty"."""
+        # create chain of Processes
+        exp = ExpectedGetTodo(1)
+        self.post_exp_process([exp], {}, 1)
+        for i in range(1, 4):
+            self.post_exp_process([exp], {'new_top_step': i}, i+1)
+        exp.lib_set('ProcessStep', [exp.procstep_as_dict(1, 2, 1),
+                                    exp.procstep_as_dict(2, 3, 2),
+                                    exp.procstep_as_dict(3, 4, 3)])
+        # post (childless) Todo of chain end, then make empty on next in line
+        self.post_exp_day([exp], {'new_todo': [4]})
+        step3_proc1 = exp.step_as_dict(3, [], 1)
+        step2_proc2 = exp.step_as_dict(2, [step3_proc1], 2)
+        step1_proc3 = exp.step_as_dict(1, [step2_proc2], 3, None, True)
+        exp.set('steps_todo_to_process', [step1_proc3])
+        self.check_json_get('/todo?id=1', exp)
+        self.check_post({'step_filler': 'make_empty_3'}, '/todo?id=1')
+        exp.set_todo_from_post(2, {'process_id': 3})
+        exp.set_todo_from_post(1, {'process_id': 4, 'children': [2]})
+        step2_proc2 = exp.step_as_dict(2, [step3_proc1], 2, None, True)
+        step1_proc3 = exp.step_as_dict(1, [step2_proc2], 3, 2, True)
+        exp.set('steps_todo_to_process', [step1_proc3])
+        self.check_json_get('/todo?id=1', exp)
+        # make new top-level Todo without chain implied by its Process
+        self.check_post({'make_empty': 2, 'adopt': [2]}, '/todo?id=1')
+        exp.set_todo_from_post(3, {'process_id': 2})
+        exp.set_todo_from_post(1, {'process_id': 4, 'children': [2, 3]})
+        step4_todo3 = exp.step_as_dict(4, [], None, 3)
+        exp.set('steps_todo_to_process', [step1_proc3, step4_todo3])
+        self.check_json_get('/todo?id=1', exp)
+        # fail on trying to call make_empty on non-existing Process
+        self.check_post({'make_full': 5}, '/todo?id=1', 404)
+
+    def test_GET_todo(self) -> None:
+        """Test GET /todo response codes."""
+        # test malformed or illegal parameter values
+        self.check_get('/todo', 404)
+        self.check_get('/todo?id=', 404)
+        self.check_get('/todo?id=foo', 400)
+        self.check_get('/todo?id=0', 404)
+        self.check_get('/todo?id=2', 404)
+        # test all existing Processes are shown as available
+        exp = ExpectedGetTodo(1)
+        self.post_exp_process([exp], {}, 1)
+        self.post_exp_day([exp], {'new_todo': [1]})
+        self.post_exp_process([exp], {}, 2)
+        self.check_json_get('/todo?id=1', exp)
+        # test chain of Processes shown as potential step nodes
+        self.post_exp_process([exp], {}, 3)
+        self.post_exp_process([exp], {}, 4)
+        self.post_exp_process([exp], {'new_top_step': 2}, 1)
+        self.post_exp_process([exp], {'new_top_step': 3, 'step_of': [1]}, 2)
+        self.post_exp_process([exp], {'new_top_step': 4, 'step_of': [2]}, 3)
+        exp.lib_set('ProcessStep', [exp.procstep_as_dict(1, 1, 2, None),
+                                    exp.procstep_as_dict(2, 2, 3, None),
+                                    exp.procstep_as_dict(3, 3, 4, None)])
+        step3_proc4 = exp.step_as_dict(3, [], 4)
+        step2_proc3 = exp.step_as_dict(2, [step3_proc4], 3)
+        step1_proc2 = exp.step_as_dict(1, [step2_proc3], 2, fillable=True)
+        exp.set('steps_todo_to_process', [step1_proc2])
+        self.check_json_get('/todo?id=1', exp)
+        # test display of parallel chains
+        proc_steps_post = {'new_top_step': 4, 'kept_steps': [1, 3]}
+        self.post_exp_process([], proc_steps_post, 1)
+        step4_proc4 = exp.step_as_dict(4, [], 4, fillable=True)
+        exp.lib_set('ProcessStep', [exp.procstep_as_dict(4, 1, 4, None)])
+        exp.set('steps_todo_to_process', [step1_proc2, step4_proc4])
+        self.check_json_get('/todo?id=1', exp)
+
+    def test_POST_todo_doneness_relations(self) -> None:
+        """Test Todo.is_done Condition, adoption relations for /todo POSTs."""
+        self.post_exp_process([], {}, 1)
+        # test Todo with adoptee can only be set done if adoptee is done too
+        self.post_exp_day([], {'new_todo': [1]})
+        self.post_exp_day([], {'new_todo': [1]})
+        self.check_post({'adopt': 2, 'is_done': 1}, '/todo?id=1', 400)
+        self.check_post({'is_done': 1}, '/todo?id=2')
+        self.check_post({'adopt': 2, 'is_done': 1}, '/todo?id=1', 302)
+        # test Todo cannot be set undone with adopted Todo not done yet
+        self.check_post({'is_done': 0}, '/todo?id=2')
+        self.check_post({'adopt': 2, 'is_done': 0}, '/todo?id=1', 400)
+        # test unadoption relieves block
+        self.check_post({'is_done': 0}, '/todo?id=1', 302)
+        # test Condition being set or unset can block doneness setting
+        c1_post = {'title': '', 'description': '', 'is_active': 0}
+        c2_post = {'title': '', 'description': '', 'is_active': 1}
+        self.check_post(c1_post, '/condition', redir='/condition?id=1')
+        self.check_post(c2_post, '/condition', redir='/condition?id=2')
+        self.check_post({'conditions': [1], 'is_done': 1}, '/todo?id=1', 400)
+        self.check_post({'is_done': 1}, '/todo?id=1', 302)
+        self.check_post({'is_done': 0}, '/todo?id=1', 302)
+        self.check_post({'blockers': [2], 'is_done': 1}, '/todo?id=1', 400)
+        self.check_post({'is_done': 1}, '/todo?id=1', 302)
+        # test setting Todo doneness can set/un-set Conditions, but only on
+        # doneness change, not by mere passive state
+        self.check_post({'is_done': 0}, '/todo?id=2', 302)
+        self.check_post({'enables': [1], 'is_done': 1}, '/todo?id=1')
+        self.check_post({'conditions': [1], 'is_done': 1}, '/todo?id=2', 400)
+        self.check_post({'enables': [1], 'is_done': 0}, '/todo?id=1')
+        self.check_post({'enables': [1], 'is_done': 1}, '/todo?id=1')
+        self.check_post({'conditions': [1], 'is_done': 1}, '/todo?id=2')
+        self.check_post({'blockers': [1], 'is_done': 0}, '/todo?id=2', 400)
+        self.check_post({'disables': [1], 'is_done': 1}, '/todo?id=1')
+        self.check_post({'blockers': [1], 'is_done': 0}, '/todo?id=2', 400)
+        self.check_post({'disables': [1]}, '/todo?id=1')
+        self.check_post({'disables': [1], 'is_done': 1}, '/todo?id=1')
+        self.check_post({'blockers': [1]}, '/todo?id=2')