feat: add workflows for pytest

Author: yanglbme

.github/workflows/pytest.yml

@@ -0,0 +1,33 @@
+name: pytest
+
+on:
+  push:
+    paths: 
+    - 'src/python/test/*.py'
+  pull_request:
+    paths:
+    - 'src/python/test/*.py'
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 4
+      matrix:
+        python-version: [3.6, 3.7]
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        sudo apt-get install redis
+        python -m pip install --upgrade pip
+        pip install redis
+    - name: Test with pytest
+      run: |
+        pip install pytest
+        pytest

langs/Redis.java renamed to src/Redis.java

@@ -0,0 +1,58 @@
+from time import time
+
+from redis import Redis
+
+
+def following_key(user):
+    return 'following:' + user
+
+
+def followers_key(user):
+    return 'followers:' + user
+
+
+def common_following_key(user1, user2):
+    return 'common:following:{}:{}'.format(user1, user2)
+
+
+class SocialRelationship:
+    def __init__(self, client: Redis, user):
+        self.client = client
+        self.user = user
+
+    def follow(self, target):
+        """关注目标用户"""
+        self.client.zadd(following_key(self.user), {target: time()})
+        self.client.zadd(followers_key(target), {self.user: time()})
+
+    def unfollow(self, target):
+        """取关目标用户"""
+        self.client.zrem(following_key(self.user), target)
+        self.client.zrem(followers_key(target), self.user)
+
+    def is_following(self, target):
+        """判断是否关注着目标用户"""
+        return self.client.zrank(following_key(self.user), target) is not None
+
+    def get_all_following(self):
+        """获取当前用户关注的所有人，并按最近关注时间倒序排列"""
+        return self.client.zrevrange(following_key(self.user), 0, -1)
+
+    def get_all_followers(self):
+        """获取当前用户的所有粉丝，并按最近关注时间倒序排列"""
+        return self.client.zrevrange(followers_key(self.user), 0, -1)
+
+    def count_following(self):
+        """获取当前用户关注的人数"""
+        return self.client.zcard(following_key(self.user))
+
+    def count_followers(self):
+        """获取当前用户的粉丝数"""
+        return self.client.zcard(followers_key(self.user))
+
+    def get_common_following(self, one):
+        """获取与某用户的共同关注"""
+        common_key = common_following_key(self.user, one)
+        self.client.zinterstore(
+            common_key, (following_key(self.user), following_key(one)))
+        return self.client.zrevrange(common_key, 0, -1)

src/python/main/__init__.py

@@ -0,0 +1,23 @@
+from unittest import TestCase
+
+from redis import Redis
+
+from main.social_relationship import SocialRelationship
+
+test_case = TestCase()
+
+
+def test_sns():
+    redis = Redis(decode_responses=True)
+    bingo = SocialRelationship(redis, 'Bingo')
+    iris = SocialRelationship(redis, 'Iris')
+    bingo.follow('Iris')
+    bingo.follow('GitHub')
+    bingo.follow('Apple')
+    iris.follow('Bingo')
+    iris.follow('GitHub')
+
+    assert bingo.is_following('Iris') is True
+    assert iris.is_following('Bingo') is True
+    assert bingo.count_following() == 3
+    test_case.assertListEqual(['GitHub'], bingo.get_common_following('Iris'))