Adding tests for the conversation

app/services/conversation.rb

@@ -14,6 +14,8 @@ def create
       REDIS.set u_id, @c_id
       send_match(u_id, @user_ids, topic)
     end
+
+    @c_id
   end
 
   def self.broadcast_from_user(user_id, nickname, message)

test/services/conversation_test.rb

@@ -0,0 +1,84 @@
+require 'test_helper'
+
+class ConversationTest < ActiveSupport::TestCase
+  teardown do
+    REDIS.flushdb
+  end
+
+  def create_conversation(*user_ids)
+    user_ids.each do |u|
+      REDIS.set "#{u}:nickname", "#{u}-nickname"
+    end
+
+    c = Conversation.new(*user_ids)
+    c.create
+  end
+
+  # Instance
+
+  test "creating a conversation" do
+    user1 = "user1"
+    user2 = "user2"
+    c_id = create_conversation(user1, user2)
+    conversation = REDIS.smembers c_id
+
+    # Check that the user_ids are in the conversation
+    assert_equal 2, (REDIS.scard c_id)
+    assert_includes conversation, user1
+    assert_includes conversation, user2
+
+    # Check that the user_ids point to the conversation
+    assert_equal c_id, (REDIS.get user1)
+    assert_equal c_id, (REDIS.get user2)
+  end
+
+  # Class
+
+  test "broadcast a message from a user" do
+    user1 = "user1"
+    user2 = "user2"
+    c_id = create_conversation(user1, user2)
+
+    assert_nothing_raised {
+      Conversation.broadcast_from_user(user1, "nickname", "hi there!")
+    }
+  end
+
+  test "broadcast typing from a user" do
+    user1 = "user1"
+    user2 = "user2"
+    c_id = create_conversation(user1, user2)
+
+    assert_nothing_raised {
+      Conversation.broadcast_typing_from_user(user1, "nickname")
+    }
+  end
+
+  test "broadcast a new topic" do
+    user1 = "user1"
+    user2 = "user2"
+    c_id = create_conversation(user1, user2)
+
+    assert_nothing_raised {
+      Conversation.broadcast_next_topic(user1, "nickname", "hi")
+    }
+  end
+
+  test "broadcast that a conversation has been ended by a user" do
+    user1 = "user1"
+    user2 = "user2"
+    c_id = create_conversation(user1, user2)
+
+    remaining_users = Conversation.ended_by_user(user1)
+    assert_includes remaining_users, user2
+
+    # Destroys the conversation
+    assert_empty (REDIS.smembers c_id)
+    assert_nil (REDIS.get user1)
+    assert_nil (REDIS.get user2)
+
+    # Sets up records to prevent rematching
+    assert_includes (REDIS.smembers "#{user1}:recent"), user2
+    assert_includes (REDIS.smembers "#{user2}:recent"), user1
+  end
+end