adds specs for respective behaviour

app/controllers/concerns/kaminari_pagination.rb

@@ -1,8 +0,0 @@
-module KaminariPagination
-  extend ActiveSupport::Concern
-
-  def bounded_pagination(items, page_number)
-    items = items.page(page_number)
-    items.to_a.empty? ? items.page(items.total_pages) : items
-  end
-end

app/controllers/dashboard/todos_controller.rb

@@ -1,11 +1,12 @@
 class Dashboard::TodosController < Dashboard::ApplicationController
-  include KaminariPagination
-
   before_action :find_todos, only: [:index, :destroy_all]
 
   def index
     @sort = params[:sort]
-    @todos = bounded_pagination(@todos, params[:page])
+    @todos = @todos.page(params[:page])
+    if @todos.out_of_range? && @todos.total_pages != 0
+      redirect_to dashboard_todos_path(page: @todos.total_pages)
+    end
   end
 
   def destroy

app/controllers/projects/issues_controller.rb

@@ -5,7 +5,6 @@ class Projects::IssuesController < Projects::ApplicationController
   include ToggleAwardEmoji
   include IssuableCollections
   include SpammableActions
-  include KaminariPagination
 
   before_action :redirect_to_external_issue_tracker, only: [:index, :new]
   before_action :module_enabled
@@ -25,7 +24,10 @@ class Projects::IssuesController < Projects::ApplicationController
 
   def index
     @issues = issues_collection
-    @issues = bounded_pagination(@issues, params[:page])
+    @issues = @issues.page(params[:page])
+    if @issues.out_of_range? && @issues.total_pages != 0
+      return redirect_to namespace_project_issues_path(page: @issues.total_pages)
+    end
 
     if params[:label_name].present?
       @labels = LabelsFinder.new(current_user, project_id: @project.id, title: params[:label_name]).execute

app/controllers/projects/merge_requests_controller.rb

@@ -6,7 +6,6 @@ class Projects::MergeRequestsController < Projects::ApplicationController
   include NotesHelper
   include ToggleAwardEmoji
   include IssuableCollections
-  include KaminariPagination
 
   before_action :module_enabled
   before_action :merge_request, only: [
@@ -38,7 +37,10 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
   def index
     @merge_requests = merge_requests_collection
-    @merge_requests = bounded_pagination(@merge_requests, params[:page])
+    @merge_requests = @merge_requests.page(params[:page])
+    if @merge_requests.out_of_range? && @merge_requests.total_pages != 0
+      return redirect_to namespace_project_merge_requests_path(page: @merge_requests.total_pages)
+    end
 
     if params[:label_name].present?
       labels_params = { project_id: @project.id, title: params[:label_name] }

app/controllers/projects/snippets_controller.rb

@@ -1,6 +1,5 @@
 class Projects::SnippetsController < Projects::ApplicationController
   include ToggleAwardEmoji
-  include KaminariPagination
 
   before_action :module_enabled
   before_action :snippet, only: [:show, :edit, :destroy, :update, :raw, :toggle_award_emoji]
@@ -26,7 +25,10 @@ class Projects::SnippetsController < Projects::ApplicationController
       project: @project,
       scope: params[:scope]
     )
-    @snippets = bounded_pagination(@snippets, params[:page])
+    @snippets = @snippets.page(params[:page])
+    if @snippets.out_of_range? && @snippets.total_pages != 0
+      redirect_to namespace_project_snippets_path(page: @snippets.total_pages)
+    end
   end
 
   def new

spec/controllers/dashboard/todos_controller_spec.rb

@@ -0,0 +1,36 @@
+require 'spec_helper'
+
+describe Dashboard::TodosController do
+  let(:user) { create(:user) }
+  let(:project) { create(:project) }
+  let(:todo_service) { TodoService.new }
+
+  describe 'GET #index' do
+    before do
+      sign_in(user)
+      project.team << [user, :developer]
+    end
+
+    context 'when using pagination' do
+      let(:last_page) { user.todos.page().total_pages }
+      let!(:issues) { create_list(:issue, 30, project: project, assignee: user) }
+
+      before do
+        issues.each { |issue| todo_service.new_issue(issue, user) }
+      end
+
+      it 'redirects to last_page if page number is larger than number of pages' do
+        get :index, page: (last_page + 1).to_param
+
+        expect(response).to redirect_to(dashboard_todos_path(page: last_page))
+      end
+
+      it 'redirects to correspondent page' do
+        get :index, page: last_page
+
+        expect(assigns(:todos).current_page).to eq(last_page)
+        expect(response).to have_http_status(200)
+      end
+    end
+  end
+end

spec/controllers/projects/issues_controller_spec.rb

@@ -52,6 +52,35 @@ describe Projects::IssuesController do
         expect(response).to have_http_status(404)
       end
     end
+
+    context 'with page param' do
+      let(:last_page) { project.issues.page().total_pages }
+      let!(:issue_list) { create_list(:issue, 30, project: project) }
+
+      before do
+        sign_in(user)
+        project.team << [user, :developer]
+      end
+
+      it 'redirects to last_page if page number is larger than number of pages' do
+        get :index,
+          namespace_id: project.namespace.path.to_param,
+          project_id: project.path.to_param,
+          page: (last_page + 1).to_param
+
+        expect(response).to redirect_to(namespace_project_issues_path(page: last_page))
+      end
+
+      it 'redirects to specified page' do
+        get :index,
+          namespace_id: project.namespace.path.to_param,
+          project_id: project.path.to_param,
+          page: last_page.to_param
+
+        expect(assigns(:issues).current_page).to eq(last_page)
+        expect(response).to have_http_status(200)
+      end
+    end
   end
 
   describe 'GET #new' do

spec/controllers/projects/merge_requests_controller_spec.rb

@@ -127,11 +127,29 @@ describe Projects::MergeRequestsController do
   end
 
   describe 'GET index' do
-    def get_merge_requests
+    let(:last_page) { project.merge_requests.page().total_pages }
+    let!(:merge_request) { create(:merge_request_with_diffs, target_project: project, source_project: project) }
+
+    def get_merge_requests(page = nil)
       get :index,
           namespace_id: project.namespace.to_param,
           project_id: project.to_param,
-          state: 'opened'
+          state: 'opened', page: page.to_param
+    end
+
+    context 'when page param' do
+      it 'redirects to last_page if page number is larger than number of pages' do
+        get_merge_requests(last_page + 1)
+
+        expect(response).to redirect_to(namespace_project_merge_requests_path(page: last_page))
+      end
+
+      it 'redirects to specified page' do
+        get_merge_requests(last_page)
+
+        expect(assigns(:merge_requests).current_page).to eq(last_page)
+        expect(response).to have_http_status(200)
+      end
     end
 
     context 'when filtering by opened state' do

spec/controllers/projects/snippets_controller_spec.rb

@@ -11,6 +11,28 @@ describe Projects::SnippetsController do
   end
 
   describe 'GET #index' do
+    context 'when page param' do
+      let(:last_page) { project.snippets.page().total_pages }
+      let!(:project_snippet) { create(:project_snippet, :public, project: project, author: user) }
+
+      it 'redirects to last_page if page number is larger than number of pages' do
+        get :index,
+          namespace_id: project.namespace.path,
+          project_id: project.path, page: (last_page + 1).to_param
+
+        expect(response).to redirect_to(namespace_project_snippets_path(page: last_page))
+      end
+
+      it 'redirects to specified page' do
+        get :index,
+          namespace_id: project.namespace.path,
+          project_id: project.path, page: (last_page).to_param
+
+        expect(assigns(:snippets).current_page).to eq(last_page)
+        expect(response).to have_http_status(200)
+      end
+    end
+
     context 'when the project snippet is private' do
       let!(:project_snippet) { create(:project_snippet, :private, project: project, author: user) }