tests: add a bunch of tests; refactor helper structures

tests.py

@@ -1,4 +1,3 @@
-from typing import TypedDict
 import pytest
 import logging
 
@@ -7,23 +6,14 @@ from teilchensammler_cli.models import TeilchenCreate, make_teilchen_input
 logger = logging.getLogger(__name__)
 
 
+@pytest.mark.final  # don't run while we are fiddling with the app
 def test_initial_layout(snap_compare):
     from teilchensammler_cli.main import app
 
     assert snap_compare(app, terminal_size=(130, 40))
 
 
-class Teilchen(TypedDict):
-    """The things I do for my LSP..."""
-
-    name: str
-    description: str
-    tags: str
-    text: str
-    number: int
-
-
-empty_teilchen: Teilchen = {
+empty_teilchen = {
     "name": "",
     "description": "",
     "tags": "",
@@ -32,23 +22,62 @@ empty_teilchen: Teilchen = {
 }
 
 
+def TC(**kwargs) -> TeilchenCreate | None:
+    """TC = TeilchenCreate
+
+    Create Teilchen with desired attributes.
+
+    Args:
+        input: mapping that must be well-formed enough to actually create a Teilchen
+
+    Returns:
+        - `None` on empty input
+        - an instance of `TeilchenCreate`
+    """
+    if kwargs:
+        arguments = empty_teilchen | kwargs
+        return TeilchenCreate(**arguments)  # ty:ignore[invalid-argument-type]
+
+
 @pytest.mark.parametrize(
     "example_input,expected",
     [
-        ("", None),
-        ("a", None),
-        ("a.", {"name": "a", "text": "a."}),
-        ("aa", None),
-        ("aa.", {"name": "aa", "text": "aa."}),
+        # Not enough data
+        ("", TC()),
+        (".", TC()),
+        ("..", TC()),
+        (".a.", TC()),
+        ("a", TC()),
+        ("aa", TC()),
+        # Just enough for "name"
+        ("a.", TC(name="a", text="a.")),
+        ("aa.", TC(name="aa", text="aa.")),
+        ("a..", TC(name="a", text="a..")),
+        ("a.b.", TC(name="a", text="a.b.")),
+        # Just enough for "name" and "description"
+        ('a."b"', TC(name="a", description="b", text='a."b"')),
+        ('a. "b"', TC(name="a", description="b", text='a. "b"')),
+        ('a. ""', TC(name="a", description="", text='a. ""')),
+        ('. ""', TC()),
+        ('. "b"', TC()),
+        # Just enough for "name" and "description" and "tags"
+        ('a. "b" #c', TC(name="a", description="b", tags="#c", text='a. "b" #c')),
+        ('a. "b #d" #c', TC(name="a", description="b #d", tags="#c #d", text='a. "b #d" #c')),
+        # swap order in input, tag result is stable
+        ('a. "b #c" #d', TC(name="a", description="b #c", tags="#c #d", text='a. "b #c" #d')),
+        # Just enough for "name" and "tags"
+        ("a. #d", TC(name="a", description="", tags="#d", text="a. #d")),
+        ("a. #d#b", TC(name="a", description="", tags="#b #d", text="a. #d#b")),
+        ("a. ##b", TC(name="a", description="", tags="#b", text="a. ##b")),
+        ("a. #", TC(name="a", description="", tags="", text="a. #")),
+        ("a. ##", TC(name="a", description="", tags="", text="a. ##")),
+        # do we care about "number"?
     ],
 )
-async def test_teilchendata_must_include_period(
+async def test_maketeilcheninput_can_create_desired_teilchen(
     example_input: str, expected: dict[str, str | int] | None
 ) -> None:
 
-    thing = expected
-    if expected:
-        arguments = empty_teilchen | expected
-        thing = TeilchenCreate(**arguments)  # ty:ignore[invalid-argument-type]
+    actual = await make_teilchen_input(example_input)
 
-    assert await make_teilchen_input(example_input) == thing
+    assert expected == actual