add user follow feature

spec/requests/user_follows_spec.rb

@@ -0,0 +1,67 @@
+require 'rails_helper'
+
+RSpec.describe "/user_follows", type: :request do
+  let(:followed) { create(:user) }
+  let(:follower) { create(:user) }
+
+  let(:valid_attributes) {
+    {
+      followed_id: followed.id,
+      follower_id: follower.id
+    }
+  }
+
+  let(:invalid_attributes) {
+    {
+      followed_id: followed.id,
+      follower_id: 'follower.id'
+    }
+  }
+
+  let(:valid_headers) {
+    {}
+  }
+
+  describe "POST /create" do
+    context "with valid parameters" do
+      it "creates a new UserFollow" do
+        expect {
+          post user_follows_url,
+               params: { user_follow: valid_attributes }, headers: valid_headers, as: :json
+        }.to change(UserFollow, :count).by(1)
+      end
+
+      it "renders a JSON response with the new user_follow" do
+        post user_follows_url,
+             params: { user_follow: valid_attributes }, headers: valid_headers, as: :json
+        expect(response).to have_http_status(:created)
+        expect(response.content_type).to match(a_string_including("application/json"))
+      end
+    end
+
+    context "with invalid parameters" do
+      it "does not create a new UserFollow" do
+        expect {
+          post user_follows_url,
+               params: { user_follow: invalid_attributes }, as: :json
+        }.to change(UserFollow, :count).by(0)
+      end
+
+      it "renders a JSON response with errors for the new user_follow" do
+        post user_follows_url,
+             params: { user_follow: invalid_attributes }, headers: valid_headers, as: :json
+        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response.content_type).to match(a_string_including("application/json"))
+      end
+    end
+  end
+
+  describe "DELETE /destroy" do
+    it "destroys the requested user_follow" do
+      user_follow = UserFollow.create! valid_attributes
+      expect {
+        delete user_follow_url(user_follow), headers: valid_headers, as: :json
+      }.to change(UserFollow, :count).by(-1)
+    end
+  end
+end