Create sessions_controller tests

spec/requests/api/sessions_spec.rb

@@ -0,0 +1,46 @@
+require 'swagger_helper'
+require 'rails_helper'
+
+RSpec.describe 'Api::SessionsControllers', type: :request do
+  before do
+    post '/api/users', params: {
+      user: {
+        username: 'user',
+        email: 'user@example.com',
+        password: 'password'
+      }
+    }
+  end
+
+  describe 'POST /create' do
+    context 'successful user login' do
+      it 'logs a user in' do
+        post '/api/users/sign_in', params: {
+          user: {
+            username: 'user',
+            password: 'password'
+          }
+        }
+
+        json = JSON.parse(response.body).deep_symbolize_keys
+        expect(response.status).to eq(200)
+        expect(json[:message]).to eq('Login successful')
+      end
+    end
+
+    context 'failed user login' do
+      it 'returns an error message' do
+        post '/api/users/sign_in', params: {
+          user: {
+            username: 'login_user',
+            password: 'password'
+          }
+        }
+
+        json = JSON.parse(response.body).deep_symbolize_keys
+        expect(response.status).to eq(401)
+        expect(json[:message]).to eq('Invalid username or password')
+      end
+    end
+  end
+end