From af2221b3ea80a6263e77e82aa36fff5bec5950b6 Mon Sep 17 00:00:00 2001
From: Alex Wilson <gpg@probablyfine.co.uk>
Date: Sat, 27 Jul 2024 12:32:20 +0100
Subject: [PATCH] test(8ball): Refactor to allow testing of choice logic

We parametrise the class with a source of randomness so it can be fixed with a seed in the tests
---
 cogs/commands/eightball.py | 23 ++++++++++++++---------
 tests/test_eightball.py    | 25 +++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 9 deletions(-)
 create mode 100644 tests/test_eightball.py

diff --git a/cogs/commands/eightball.py b/cogs/commands/eightball.py
index 53d7993..88d61c2 100644
--- a/cogs/commands/eightball.py
+++ b/cogs/commands/eightball.py
@@ -1,7 +1,7 @@
-import random
+from random import Random
 import shlex
 import string
-from typing import List
+from typing import List, Optional
 
 from discord.ext import commands
 from discord.ext.commands import Bot, Context, clean_content
@@ -16,20 +16,25 @@
 
 
 class EightBall(commands.Cog):
-    def __init__(self, bot: Bot, options: List[string]):
+    def __init__(self, bot: Bot, random: Random, options: List[string]):
         self.bot = bot
+        self.random = random
         self.options = options
 
+    async def execute(self, author: string, args: List[string]) -> Optional[string]:
+        if len(args) == 1:
+            return f"You must pose the Magic 8-ball a dilemma {author}!"
+        else:
+            return f"{author}: {(self.random.choice(self.options))}"
+
     @commands.hybrid_command(name="8ball", help=LONG_HELP_TEXT, brief=SHORT_HELP_TEXT)
-    async def execute(self, ctx: Context, *, args: str = ""):
+    async def eight_ball(self, ctx: Context, *, args: str = ""):
         args = await clean_content().convert(ctx, args)
         args = shlex.split(args)
         display_name = get_name_string(ctx.message)
 
-        if len(args) == 1:
-            await ctx.send(f"You must pose the Magic 8-ball a dilemma {display_name}!")
-        else:
-            await ctx.send(f"{display_name}: {(random.choice(self.options))}")
+        if response := self.execute(display_name, args):
+            await ctx.send(response)
 
 
 async def setup(bot: Bot):
@@ -59,4 +64,4 @@ async def setup(bot: Bot):
         "Very doubtful",
     ]
 
-    await bot.add_cog(EightBall(bot, options))
+    await bot.add_cog(EightBall(bot, Random(), options))
diff --git a/tests/test_eightball.py b/tests/test_eightball.py
new file mode 100644
index 0000000..ee355ad
--- /dev/null
+++ b/tests/test_eightball.py
@@ -0,0 +1,25 @@
+from random import Random
+
+from discord import Intents
+from discord.ext.commands import Bot
+
+from cogs.commands.eightball import EightBall
+
+
+def test_eightball_no_question():
+    eightball = EightBall(Bot("/", intents=Intents()), Random(1), [])
+
+    assert (
+        eightball.execute("test", [])
+        == "You must pose the Magic 8-ball a dilemma test!"
+    )
+
+
+def test_eightball_question_with_fixed_randomness():
+    eightball = EightBall(
+        Bot("/", intents=Intents()), Random(1), ["Yes", "No", "Maybe"]
+    )
+
+    answers = [eightball.execute("test", []) for i in range(0, 7)]
+
+    assert answers == ["Yes", "Maybe", "Yes", "No", "Yes", "No", "No"]