+315
-315
@@ -1,315 +1,315 @@
|
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"""Fakes that stand in for turtles and the screen, so that no test opens a window."""
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||||
|
||||
import importlib
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import math
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import os
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import subprocess
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||||
import sys
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||||
import types
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||||
from collections.abc import Callable, Sequence
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||||
from pathlib import Path
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from typing import Any
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||||
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import pytest
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||||
|
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from snake_game.snake import Snake
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SRC = Path(__file__).resolve().parents[1] / "src"
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# Modules whose classes inherit from `Turtle`: they bind their base class when they
|
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# are imported, so each test that installs the fake `turtle` module imports them anew.
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||||
INHERITING_MODULES = ("snake_game.food", "snake_game.scoreboard")
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class FakeTerminatorError(Exception):
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||||
"""Stands in for `turtle.Terminator`."""
|
||||
|
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class FakeTclError(Exception):
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"""Stands in for `tkinter.TclError`."""
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|
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class FakeSegment:
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"""A turtle that records what is done to it, in order, and keeps its state.
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|
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It is a segment of the snake, and also the base class that stands in for
|
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`turtle.Turtle` when `Food` and `Scoreboard` are tested.
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"""
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def __init__(self) -> None:
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self.calls: list[tuple[str, tuple[object, ...]]] = []
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self.x = 0.0
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self.y = 0.0
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self.angle = 0.0
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def shape(self, name: str, /) -> None:
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self.calls.append(("shape", (name,)))
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def shapesize(self, stretch_wid: float, stretch_len: float) -> None:
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self.calls.append(("shapesize", (stretch_wid, stretch_len)))
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||||
|
||||
def color(self, color: str, /) -> None:
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||||
self.calls.append(("color", (color,)))
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def speed(self, speed: str) -> None:
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self.calls.append(("speed", (speed,)))
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|
||||
def penup(self) -> None:
|
||||
self.calls.append(("penup", ()))
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def hideturtle(self) -> None:
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self.calls.append(("hideturtle", ()))
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def clear(self) -> None:
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self.calls.append(("clear", ()))
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def write(
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self,
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arg: str,
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align: str = "left",
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font: tuple[str, int, str] = ("Arial", 8, "normal"),
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) -> None:
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self.calls.append(("write", (arg, align, font)))
|
||||
|
||||
def goto(self, x: float | tuple[float, float], y: float | None = None, /) -> None:
|
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if isinstance(x, tuple):
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x, y = x
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assert y is not None
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self.calls.append(("goto", (x, y)))
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self.x, self.y = x, y
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def xcor(self) -> float:
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return self.x
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def ycor(self) -> float:
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return self.y
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def position(self) -> tuple[float, float]:
|
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return (self.x, self.y)
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|
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def distance(self, x: tuple[float, float], /) -> float:
|
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return math.hypot(self.x - x[0], self.y - x[1])
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|
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def forward(self, distance: float, /) -> None:
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||||
self.calls.append(("forward", (distance,)))
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radians = math.radians(self.angle)
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self.x += round(distance * math.cos(radians), 10)
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self.y += round(distance * math.sin(radians), 10)
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||||
|
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def heading(self) -> float:
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||||
return self.angle
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||||
|
||||
def setheading(self, to_angle: float, /) -> None:
|
||||
self.calls.append(("setheading", (to_angle,)))
|
||||
self.angle = float(to_angle) % 360
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|
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def call_names(self) -> list[str]:
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"""Return the names of the calls, in the order they were made."""
|
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return [name for name, _ in self.calls]
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|
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class FakeShape:
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||||
"""Stands in for `turtle.Shape`: it records its type and its components."""
|
||||
|
||||
def __init__(self, type_: str, data: object = None) -> None:
|
||||
self.type = type_
|
||||
self.components: list[tuple[object, object, object]] = []
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||||
|
||||
def addcomponent(self, poly: object, fill: object, outline: object = None) -> None:
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self.components.append((poly, fill, outline))
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|
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class FakeFood:
|
||||
"""A food that counts how often it was moved."""
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def __init__(self, x: float, y: float) -> None:
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self.x = x
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self.y = y
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self.refreshes = 0
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def refresh(self) -> None:
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self.refreshes += 1
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def position(self) -> tuple[float, float]:
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return (self.x, self.y)
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class FakeScoreboard:
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"""A scoreboard that counts how often the score was raised."""
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def __init__(self) -> None:
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self.increases = 0
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self.game_overs = 0
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def increase_score(self) -> None:
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self.increases += 1
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def game_over(self) -> None:
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self.game_overs += 1
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class FakeScreen:
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"""A screen that records what is done to it, in order.
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||||
|
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After `frames_before_close` updates it behaves like a closed window: the next
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||||
`update` raises `closing_error`.
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"""
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def __init__(
|
||||
self,
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frames_before_close: int = 0,
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closing_error: type[Exception] = FakeTerminatorError,
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) -> None:
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self.calls: list[tuple[str, tuple[object, ...]]] = []
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self.bindings: dict[str, Callable[[], object]] = {}
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self._updates_left = frames_before_close
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self._closing_error = closing_error
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def setup(self, width: float, height: float) -> None:
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self.calls.append(("setup", (width, height)))
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def bgcolor(self, color: str, /) -> None:
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self.calls.append(("bgcolor", (color,)))
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def title(self, titlestring: str, /) -> None:
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self.calls.append(("title", (titlestring,)))
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def register_shape(self, name: str, shape: object, /) -> None:
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self.calls.append(("register_shape", (name, shape)))
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def tracer(self, n: int, /) -> None:
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self.calls.append(("tracer", (n,)))
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def listen(self) -> None:
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self.calls.append(("listen", ()))
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def onkey(self, fun: Callable[[], object], key: str) -> None:
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self.calls.append(("onkey", (key,)))
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self.bindings[key] = fun
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def update(self) -> None:
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self.calls.append(("update", ()))
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if self._updates_left == 0:
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raise self._closing_error
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self._updates_left -= 1
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def exitonclick(self) -> None:
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self.calls.append(("exitonclick", ()))
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def call_names(self) -> list[str]:
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"""Return the names of the calls, in the order they were made."""
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return [name for name, _ in self.calls]
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def make_snake() -> tuple[Snake, list[FakeSegment]]:
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"""Make a snake whose segments are fakes, and return the fakes too."""
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created: list[FakeSegment] = []
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def factory() -> FakeSegment:
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segment = FakeSegment()
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created.append(segment)
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return segment
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return Snake(segment_factory=factory), created
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def install_fake_turtle(
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monkeypatch: pytest.MonkeyPatch,
|
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*,
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||||
frames_before_close: int = 0,
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closing_error: type[Exception] = FakeTerminatorError,
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) -> tuple[list[FakeSegment], list[FakeScreen]]:
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"""Replace the `turtle` and `tkinter` modules with fakes for one test.
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The fake screen acts like a window that the player closes after
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`frames_before_close` updates, by raising `closing_error` from `update`.
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Every turtle the code under test creates, including a `Food` or a `Scoreboard`
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whose base class is the fake `Turtle`, is added to the first list returned;
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every screen is added to the second. `food` and `scoreboard` are forgotten, so
|
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that they are imported again against the fake and removed again after the test.
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"""
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segments: list[FakeSegment] = []
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screens: list[FakeScreen] = []
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class RegisteredSegment(FakeSegment):
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def __init__(self) -> None:
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super().__init__()
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segments.append(self)
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def make_screen() -> FakeScreen:
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screen = FakeScreen(frames_before_close, closing_error)
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screens.append(screen)
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return screen
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turtle_module = types.ModuleType("turtle")
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turtle_module.__dict__["Turtle"] = RegisteredSegment
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turtle_module.__dict__["Screen"] = make_screen
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turtle_module.__dict__["Shape"] = FakeShape
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turtle_module.__dict__["Terminator"] = FakeTerminatorError
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tkinter_module = types.ModuleType("tkinter")
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tkinter_module.__dict__["TclError"] = FakeTclError
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monkeypatch.setitem(sys.modules, "turtle", turtle_module)
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monkeypatch.setitem(sys.modules, "tkinter", tkinter_module)
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for name in INHERITING_MODULES:
|
||||
# Set, then delete: when the test ends monkeypatch undoes both in reverse
|
||||
# order and the key is gone again, whatever the test imported meanwhile.
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||||
monkeypatch.setitem(sys.modules, name, types.ModuleType(name))
|
||||
monkeypatch.delitem(sys.modules, name)
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return segments, screens
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|
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def script_randint(
|
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monkeypatch: pytest.MonkeyPatch, values: Sequence[int]
|
||||
) -> list[tuple[int, int]]:
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||||
"""Make `random.randint` return the given values in turn, then the upper bound.
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||||
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Returns the list that collects the bounds of every call.
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||||
"""
|
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queue = iter(values)
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||||
bounds: list[tuple[int, int]] = []
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||||
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def fake_randint(low: int, high: int) -> int:
|
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bounds.append((low, high))
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return next(queue, high)
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monkeypatch.setattr("random.randint", fake_randint)
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return bounds
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|
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def make_food(monkeypatch: pytest.MonkeyPatch) -> Any:
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||||
"""Make a real `Food` whose base class is the fake `Turtle`.
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|
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The result is typed `Any` because it has the methods of `Food` (`refresh`) and
|
||||
the recording methods of the fake base class (`calls`, `position`) at once.
|
||||
"""
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||||
install_fake_turtle(monkeypatch)
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module = importlib.import_module("snake_game.food")
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||||
return module.Food()
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||||
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|
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def make_scoreboard(monkeypatch: pytest.MonkeyPatch) -> Any:
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"""Make a real `Scoreboard` whose base class is the fake `Turtle`.
|
||||
|
||||
The result is typed `Any` because it has the methods of `Scoreboard`
|
||||
(`increase_score`) and the recording methods of the fake base class (`calls`)
|
||||
at once.
|
||||
"""
|
||||
install_fake_turtle(monkeypatch)
|
||||
module = importlib.import_module("snake_game.scoreboard")
|
||||
return module.Scoreboard()
|
||||
|
||||
|
||||
def imports_turtle_or_tkinter(module_name: str) -> bool:
|
||||
"""Tell whether importing a module in a fresh interpreter loads a display module."""
|
||||
code = (
|
||||
f"import sys, {module_name}; "
|
||||
"print('turtle' in sys.modules or 'tkinter' in sys.modules)"
|
||||
)
|
||||
result = subprocess.run(
|
||||
[sys.executable, "-c", code],
|
||||
env={**os.environ, "PYTHONPATH": str(SRC)},
|
||||
capture_output=True,
|
||||
text=True,
|
||||
check=False,
|
||||
)
|
||||
assert result.returncode == 0, result.stderr
|
||||
return result.stdout.strip() == "True"
|
||||
"""Fakes that stand in for turtles and the screen, so that no test opens a window."""
|
||||
|
||||
import importlib
|
||||
import math
|
||||
import os
|
||||
import subprocess
|
||||
import sys
|
||||
import types
|
||||
from collections.abc import Callable, Sequence
|
||||
from pathlib import Path
|
||||
from typing import Any
|
||||
|
||||
import pytest
|
||||
|
||||
from snake_game.snake import Snake
|
||||
|
||||
SRC = Path(__file__).resolve().parents[1] / "src"
|
||||
# Modules whose classes inherit from `Turtle`: they bind their base class when they
|
||||
# are imported, so each test that installs the fake `turtle` module imports them anew.
|
||||
INHERITING_MODULES = ("snake_game.food", "snake_game.scoreboard")
|
||||
|
||||
|
||||
class FakeTerminatorError(Exception):
|
||||
"""Stands in for `turtle.Terminator`."""
|
||||
|
||||
|
||||
class FakeTclError(Exception):
|
||||
"""Stands in for `tkinter.TclError`."""
|
||||
|
||||
|
||||
class FakeSegment:
|
||||
"""A turtle that records what is done to it, in order, and keeps its state.
|
||||
|
||||
It is a segment of the snake, and also the base class that stands in for
|
||||
`turtle.Turtle` when `Food` and `Scoreboard` are tested.
|
||||
"""
|
||||
|
||||
def __init__(self) -> None:
|
||||
self.calls: list[tuple[str, tuple[object, ...]]] = []
|
||||
self.x = 0.0
|
||||
self.y = 0.0
|
||||
self.angle = 0.0
|
||||
|
||||
def shape(self, name: str, /) -> None:
|
||||
self.calls.append(("shape", (name,)))
|
||||
|
||||
def shapesize(self, stretch_wid: float, stretch_len: float) -> None:
|
||||
self.calls.append(("shapesize", (stretch_wid, stretch_len)))
|
||||
|
||||
def color(self, color: str, /) -> None:
|
||||
self.calls.append(("color", (color,)))
|
||||
|
||||
def speed(self, speed: str) -> None:
|
||||
self.calls.append(("speed", (speed,)))
|
||||
|
||||
def penup(self) -> None:
|
||||
self.calls.append(("penup", ()))
|
||||
|
||||
def hideturtle(self) -> None:
|
||||
self.calls.append(("hideturtle", ()))
|
||||
|
||||
def clear(self) -> None:
|
||||
self.calls.append(("clear", ()))
|
||||
|
||||
def write(
|
||||
self,
|
||||
arg: str,
|
||||
align: str = "left",
|
||||
font: tuple[str, int, str] = ("Arial", 8, "normal"),
|
||||
) -> None:
|
||||
self.calls.append(("write", (arg, align, font)))
|
||||
|
||||
def goto(self, x: float | tuple[float, float], y: float | None = None, /) -> None:
|
||||
if isinstance(x, tuple):
|
||||
x, y = x
|
||||
assert y is not None
|
||||
self.calls.append(("goto", (x, y)))
|
||||
self.x, self.y = x, y
|
||||
|
||||
def xcor(self) -> float:
|
||||
return self.x
|
||||
|
||||
def ycor(self) -> float:
|
||||
return self.y
|
||||
|
||||
def position(self) -> tuple[float, float]:
|
||||
return (self.x, self.y)
|
||||
|
||||
def distance(self, x: tuple[float, float], /) -> float:
|
||||
return math.hypot(self.x - x[0], self.y - x[1])
|
||||
|
||||
def forward(self, distance: float, /) -> None:
|
||||
self.calls.append(("forward", (distance,)))
|
||||
radians = math.radians(self.angle)
|
||||
self.x += round(distance * math.cos(radians), 10)
|
||||
self.y += round(distance * math.sin(radians), 10)
|
||||
|
||||
def heading(self) -> float:
|
||||
return self.angle
|
||||
|
||||
def setheading(self, to_angle: float, /) -> None:
|
||||
self.calls.append(("setheading", (to_angle,)))
|
||||
self.angle = float(to_angle) % 360
|
||||
|
||||
def call_names(self) -> list[str]:
|
||||
"""Return the names of the calls, in the order they were made."""
|
||||
return [name for name, _ in self.calls]
|
||||
|
||||
|
||||
class FakeShape:
|
||||
"""Stands in for `turtle.Shape`: it records its type and its components."""
|
||||
|
||||
def __init__(self, type_: str, data: object = None) -> None:
|
||||
self.type = type_
|
||||
self.components: list[tuple[object, object, object]] = []
|
||||
|
||||
def addcomponent(self, poly: object, fill: object, outline: object = None) -> None:
|
||||
self.components.append((poly, fill, outline))
|
||||
|
||||
|
||||
class FakeFood:
|
||||
"""A food that counts how often it was moved."""
|
||||
|
||||
def __init__(self, x: float, y: float) -> None:
|
||||
self.x = x
|
||||
self.y = y
|
||||
self.refreshes = 0
|
||||
|
||||
def refresh(self) -> None:
|
||||
self.refreshes += 1
|
||||
|
||||
def position(self) -> tuple[float, float]:
|
||||
return (self.x, self.y)
|
||||
|
||||
|
||||
class FakeScoreboard:
|
||||
"""A scoreboard that counts how often the score was raised."""
|
||||
|
||||
def __init__(self) -> None:
|
||||
self.increases = 0
|
||||
self.resets = 0
|
||||
|
||||
def increase_score(self) -> None:
|
||||
self.increases += 1
|
||||
|
||||
def reset(self) -> None:
|
||||
self.resets += 1
|
||||
|
||||
|
||||
class FakeScreen:
|
||||
"""A screen that records what is done to it, in order.
|
||||
|
||||
After `frames_before_close` updates it behaves like a closed window: the next
|
||||
`update` raises `closing_error`.
|
||||
"""
|
||||
|
||||
def __init__(
|
||||
self,
|
||||
frames_before_close: int = 0,
|
||||
closing_error: type[Exception] = FakeTerminatorError,
|
||||
) -> None:
|
||||
self.calls: list[tuple[str, tuple[object, ...]]] = []
|
||||
self.bindings: dict[str, Callable[[], object]] = {}
|
||||
self._updates_left = frames_before_close
|
||||
self._closing_error = closing_error
|
||||
|
||||
def setup(self, width: float, height: float) -> None:
|
||||
self.calls.append(("setup", (width, height)))
|
||||
|
||||
def bgcolor(self, color: str, /) -> None:
|
||||
self.calls.append(("bgcolor", (color,)))
|
||||
|
||||
def title(self, titlestring: str, /) -> None:
|
||||
self.calls.append(("title", (titlestring,)))
|
||||
|
||||
def register_shape(self, name: str, shape: object, /) -> None:
|
||||
self.calls.append(("register_shape", (name, shape)))
|
||||
|
||||
def tracer(self, n: int, /) -> None:
|
||||
self.calls.append(("tracer", (n,)))
|
||||
|
||||
def listen(self) -> None:
|
||||
self.calls.append(("listen", ()))
|
||||
|
||||
def onkey(self, fun: Callable[[], object], key: str) -> None:
|
||||
self.calls.append(("onkey", (key,)))
|
||||
self.bindings[key] = fun
|
||||
|
||||
def update(self) -> None:
|
||||
self.calls.append(("update", ()))
|
||||
if self._updates_left == 0:
|
||||
raise self._closing_error
|
||||
self._updates_left -= 1
|
||||
|
||||
def exitonclick(self) -> None:
|
||||
self.calls.append(("exitonclick", ()))
|
||||
|
||||
def call_names(self) -> list[str]:
|
||||
"""Return the names of the calls, in the order they were made."""
|
||||
return [name for name, _ in self.calls]
|
||||
|
||||
|
||||
def make_snake() -> tuple[Snake, list[FakeSegment]]:
|
||||
"""Make a snake whose segments are fakes, and return the fakes too."""
|
||||
created: list[FakeSegment] = []
|
||||
|
||||
def factory() -> FakeSegment:
|
||||
segment = FakeSegment()
|
||||
created.append(segment)
|
||||
return segment
|
||||
|
||||
return Snake(segment_factory=factory), created
|
||||
|
||||
|
||||
def install_fake_turtle(
|
||||
monkeypatch: pytest.MonkeyPatch,
|
||||
*,
|
||||
frames_before_close: int = 0,
|
||||
closing_error: type[Exception] = FakeTerminatorError,
|
||||
) -> tuple[list[FakeSegment], list[FakeScreen]]:
|
||||
"""Replace the `turtle` and `tkinter` modules with fakes for one test.
|
||||
|
||||
The fake screen acts like a window that the player closes after
|
||||
`frames_before_close` updates, by raising `closing_error` from `update`.
|
||||
Every turtle the code under test creates, including a `Food` or a `Scoreboard`
|
||||
whose base class is the fake `Turtle`, is added to the first list returned;
|
||||
every screen is added to the second. `food` and `scoreboard` are forgotten, so
|
||||
that they are imported again against the fake and removed again after the test.
|
||||
"""
|
||||
segments: list[FakeSegment] = []
|
||||
screens: list[FakeScreen] = []
|
||||
|
||||
class RegisteredSegment(FakeSegment):
|
||||
def __init__(self) -> None:
|
||||
super().__init__()
|
||||
segments.append(self)
|
||||
|
||||
def make_screen() -> FakeScreen:
|
||||
screen = FakeScreen(frames_before_close, closing_error)
|
||||
screens.append(screen)
|
||||
return screen
|
||||
|
||||
turtle_module = types.ModuleType("turtle")
|
||||
turtle_module.__dict__["Turtle"] = RegisteredSegment
|
||||
turtle_module.__dict__["Screen"] = make_screen
|
||||
turtle_module.__dict__["Shape"] = FakeShape
|
||||
turtle_module.__dict__["Terminator"] = FakeTerminatorError
|
||||
tkinter_module = types.ModuleType("tkinter")
|
||||
tkinter_module.__dict__["TclError"] = FakeTclError
|
||||
monkeypatch.setitem(sys.modules, "turtle", turtle_module)
|
||||
monkeypatch.setitem(sys.modules, "tkinter", tkinter_module)
|
||||
for name in INHERITING_MODULES:
|
||||
# Set, then delete: when the test ends monkeypatch undoes both in reverse
|
||||
# order and the key is gone again, whatever the test imported meanwhile.
|
||||
monkeypatch.setitem(sys.modules, name, types.ModuleType(name))
|
||||
monkeypatch.delitem(sys.modules, name)
|
||||
return segments, screens
|
||||
|
||||
|
||||
def script_randint(
|
||||
monkeypatch: pytest.MonkeyPatch, values: Sequence[int]
|
||||
) -> list[tuple[int, int]]:
|
||||
"""Make `random.randint` return the given values in turn, then the upper bound.
|
||||
|
||||
Returns the list that collects the bounds of every call.
|
||||
"""
|
||||
queue = iter(values)
|
||||
bounds: list[tuple[int, int]] = []
|
||||
|
||||
def fake_randint(low: int, high: int) -> int:
|
||||
bounds.append((low, high))
|
||||
return next(queue, high)
|
||||
|
||||
monkeypatch.setattr("random.randint", fake_randint)
|
||||
return bounds
|
||||
|
||||
|
||||
def make_food(monkeypatch: pytest.MonkeyPatch) -> Any:
|
||||
"""Make a real `Food` whose base class is the fake `Turtle`.
|
||||
|
||||
The result is typed `Any` because it has the methods of `Food` (`refresh`) and
|
||||
the recording methods of the fake base class (`calls`, `position`) at once.
|
||||
"""
|
||||
install_fake_turtle(monkeypatch)
|
||||
module = importlib.import_module("snake_game.food")
|
||||
return module.Food()
|
||||
|
||||
|
||||
def make_scoreboard(monkeypatch: pytest.MonkeyPatch) -> Any:
|
||||
"""Make a real `Scoreboard` whose base class is the fake `Turtle`.
|
||||
|
||||
The result is typed `Any` because it has the methods of `Scoreboard`
|
||||
(`increase_score`) and the recording methods of the fake base class (`calls`)
|
||||
at once.
|
||||
"""
|
||||
install_fake_turtle(monkeypatch)
|
||||
module = importlib.import_module("snake_game.scoreboard")
|
||||
return module.Scoreboard()
|
||||
|
||||
|
||||
def imports_turtle_or_tkinter(module_name: str) -> bool:
|
||||
"""Tell whether importing a module in a fresh interpreter loads a display module."""
|
||||
code = (
|
||||
f"import sys, {module_name}; "
|
||||
"print('turtle' in sys.modules or 'tkinter' in sys.modules)"
|
||||
)
|
||||
result = subprocess.run(
|
||||
[sys.executable, "-c", code],
|
||||
env={**os.environ, "PYTHONPATH": str(SRC)},
|
||||
capture_output=True,
|
||||
text=True,
|
||||
check=False,
|
||||
)
|
||||
assert result.returncode == 0, result.stderr
|
||||
return result.stdout.strip() == "True"
|
||||
|
||||
+52
-45
@@ -20,10 +20,10 @@ from snake_game.main import (
|
||||
bind_keys,
|
||||
configure_screen,
|
||||
eat_food_if_close,
|
||||
end_game_if_over,
|
||||
main,
|
||||
play_frame,
|
||||
register_head_shape,
|
||||
reset_if_collision,
|
||||
)
|
||||
from snake_game.snake import Snake
|
||||
|
||||
@@ -276,7 +276,7 @@ def test_main_lets_the_snake_eat_the_food_that_lies_on_its_way(
|
||||
("goto", (20, 0)),
|
||||
("goto", (constants.WALL_LIMIT, constants.WALL_LIMIT)),
|
||||
]
|
||||
assert scoreboard.calls[-1][1][0] == "Score: 1"
|
||||
assert scoreboard.calls[-1][1][0] == "Score: 1 High Score: 0"
|
||||
assert new_segment.position() == (-20, 0) # where the last segment was
|
||||
|
||||
|
||||
@@ -288,86 +288,93 @@ def test_main_does_not_raise_the_score_when_the_food_is_far_away(
|
||||
main()
|
||||
|
||||
scoreboard = turtles[4]
|
||||
assert scoreboard.calls[-1][1][0] == "Score: 0"
|
||||
assert scoreboard.calls[-1][1][0] == "Score: 0 High Score: 0"
|
||||
assert len(turtles) == len(constants.STARTING_POSITIONS) + 2
|
||||
|
||||
|
||||
def test_the_game_is_not_over_while_the_snake_is_inside_and_clear_of_its_tail() -> None:
|
||||
snake, _ = make_snake()
|
||||
def test_nothing_is_reset_while_the_snake_is_inside_and_clear_of_its_tail() -> None:
|
||||
snake, created = make_snake()
|
||||
scoreboard = FakeScoreboard()
|
||||
|
||||
assert not end_game_if_over(snake, scoreboard)
|
||||
assert scoreboard.game_overs == 0
|
||||
assert not reset_if_collision(snake, scoreboard)
|
||||
assert scoreboard.resets == 0
|
||||
assert len(created) == len(constants.STARTING_POSITIONS)
|
||||
|
||||
|
||||
def test_the_game_is_over_when_the_head_passes_the_wall() -> None:
|
||||
snake, _ = make_snake()
|
||||
def test_the_game_is_reset_when_the_head_passes_the_wall() -> None:
|
||||
snake, created = make_snake()
|
||||
snake.head.goto(constants.WALL_LIMIT + 1, 0)
|
||||
scoreboard = FakeScoreboard()
|
||||
|
||||
assert end_game_if_over(snake, scoreboard)
|
||||
assert scoreboard.game_overs == 1
|
||||
assert reset_if_collision(snake, scoreboard)
|
||||
assert scoreboard.resets == 1
|
||||
assert len(created) == 2 * len(constants.STARTING_POSITIONS)
|
||||
|
||||
|
||||
def test_the_game_is_over_when_the_head_touches_the_tail() -> None:
|
||||
def test_the_game_is_reset_when_the_head_touches_the_tail() -> None:
|
||||
snake, created = make_snake()
|
||||
created[1].goto(3, 4)
|
||||
scoreboard = FakeScoreboard()
|
||||
|
||||
assert end_game_if_over(snake, scoreboard)
|
||||
assert scoreboard.game_overs == 1
|
||||
assert reset_if_collision(snake, scoreboard)
|
||||
assert scoreboard.resets == 1
|
||||
assert snake.head is not created[0]
|
||||
|
||||
|
||||
def test_main_ends_the_game_at_the_wall_shows_game_over_and_waits_for_a_click(
|
||||
def test_main_goes_on_after_the_wall_with_a_new_snake_and_no_game_over(
|
||||
monkeypatch: pytest.MonkeyPatch, sleeps: list[float]
|
||||
) -> None:
|
||||
turtles, screens = install_fake_turtle(monkeypatch, frames_before_close=100)
|
||||
moves_to_pass_the_wall = constants.WALL_LIMIT // constants.MOVE_DISTANCE + 1
|
||||
turtles, screens = install_fake_turtle(
|
||||
monkeypatch, frames_before_close=moves_to_pass_the_wall + 2
|
||||
)
|
||||
|
||||
main()
|
||||
|
||||
snake_head, scoreboard = turtles[0], turtles[4]
|
||||
moves_to_pass_the_wall = constants.WALL_LIMIT // constants.MOVE_DISTANCE + 1
|
||||
assert snake_head.call_names().count("forward") == moves_to_pass_the_wall
|
||||
assert snake_head.position() == (
|
||||
constants.MOVE_DISTANCE * moves_to_pass_the_wall,
|
||||
0,
|
||||
)
|
||||
old_head, scoreboard = turtles[0], turtles[4]
|
||||
new_head = turtles[5]
|
||||
written = [call[1][0] for call in scoreboard.calls if call[0] == "write"]
|
||||
assert old_head.position() == constants.SEGMENT_PARKING_POSITION
|
||||
assert new_head.call_names().count("forward") == 2
|
||||
assert new_head.position() == (2 * constants.MOVE_DISTANCE, 0)
|
||||
assert scoreboard.calls[-1] == (
|
||||
"write",
|
||||
("GAME OVER", "center", ("Arial", 24, "normal")),
|
||||
("Score: 0 High Score: 0", "center", ("Arial", 24, "normal")),
|
||||
)
|
||||
assert screens[0].call_names()[-2:] == ["update", "exitonclick"]
|
||||
assert screens[0].call_names().count("exitonclick") == 1
|
||||
assert sleeps == [constants.REFRESH_DELAY_SECONDS] * moves_to_pass_the_wall
|
||||
assert "GAME OVER" not in written
|
||||
assert "exitonclick" not in screens[0].call_names()
|
||||
|
||||
|
||||
def test_main_ends_the_game_when_the_snake_touches_its_tail(
|
||||
def test_main_shows_the_best_score_after_a_reset(
|
||||
monkeypatch: pytest.MonkeyPatch, sleeps: list[float]
|
||||
) -> None:
|
||||
script_randint(monkeypatch, [20, 0]) # the first food lies one move ahead
|
||||
moves_to_pass_the_wall = constants.WALL_LIMIT // constants.MOVE_DISTANCE + 1
|
||||
turtles, _ = install_fake_turtle(
|
||||
monkeypatch, frames_before_close=moves_to_pass_the_wall
|
||||
)
|
||||
|
||||
main()
|
||||
|
||||
scoreboard = turtles[4]
|
||||
assert scoreboard.calls[-1][1][0] == "Score: 0 High Score: 1"
|
||||
|
||||
|
||||
def test_main_resets_when_the_snake_touches_its_tail(
|
||||
monkeypatch: pytest.MonkeyPatch, sleeps: list[float]
|
||||
) -> None:
|
||||
monkeypatch.setattr("snake_game.snake.Snake.hits_tail", lambda self: True)
|
||||
turtles, screens = install_fake_turtle(monkeypatch, frames_before_close=100)
|
||||
turtles, screens = install_fake_turtle(monkeypatch, frames_before_close=2)
|
||||
|
||||
main()
|
||||
|
||||
assert turtles[0].call_names().count("forward") == 1
|
||||
assert turtles[4].calls[-1][1][0] == "GAME OVER"
|
||||
assert screens[0].call_names()[-1] == "exitonclick"
|
||||
|
||||
|
||||
def test_main_does_not_move_the_snake_after_game_over(
|
||||
monkeypatch: pytest.MonkeyPatch, sleeps: list[float]
|
||||
) -> None:
|
||||
turtles, screens = install_fake_turtle(monkeypatch, frames_before_close=100)
|
||||
|
||||
main()
|
||||
|
||||
updates = screens[0].call_names().count("update")
|
||||
moves = turtles[0].call_names().count("forward")
|
||||
assert updates == moves + 1 # one update per frame, and one for the last text
|
||||
assert turtles[0].position() == constants.SEGMENT_PARKING_POSITION
|
||||
assert "exitonclick" not in screens[0].call_names()
|
||||
|
||||
|
||||
@pytest.mark.parametrize("closing_error", [FakeTerminatorError, FakeTclError])
|
||||
def test_main_ends_quietly_when_the_window_is_closed_after_game_over(
|
||||
def test_main_ends_quietly_when_the_window_is_closed_after_a_reset(
|
||||
monkeypatch: pytest.MonkeyPatch,
|
||||
sleeps: list[float],
|
||||
closing_error: type[Exception],
|
||||
@@ -381,7 +388,7 @@ def test_main_ends_quietly_when_the_window_is_closed_after_game_over(
|
||||
|
||||
main()
|
||||
|
||||
assert turtles[4].calls[-1][1][0] == "GAME OVER"
|
||||
assert turtles[4].calls[-1][1][0] == "Score: 0 High Score: 0"
|
||||
assert "exitonclick" not in screens[0].call_names()
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user