Digitalization has changed our world and how we interact with different systems. Desktop applications have more and more been integrated with internet, and the web browser has become the Graphical User Interface (GUI) in today’s system solutions. A change that needs to be considered in the automated regression testing process. Using the actual GUI has over time shown to be a complicated task and is therefore often broken out as its own standalone test object. This study looked into time and quality constrains of using the GUI as driver of the regression testing of business requirements in a web based solution. By evaluating the differences in execution times of test cases between Application Programming Interface (API) calls and GUI driven testing, flakiness of test results and required modifications over time for a specific test suite. These constraints were analyzed by looking into how reliability of the test results could be achieved. With a GUI driven full end to end scope the quality in software solutions could be improved with a reduction in the number of interface issues and detected errors in deployed systems. It would also reduce the volume of test cases that needs to be executed and maintained as there are no longer standalone parts to verify separately with partially overlapping test cases. The implementation utilized Selenium WebDriver to drive the GUI and the results showed that by utilizing Selenium the test execution times were increased from approximately 2 seconds (API) to 20-75 seconds (Selenium). The flaky test results could be eliminated by applying the appropriate pattern to detect, locate, and scroll into visibility prior to interacting with the elements. In the end of the study the test execution results were 100% reliable. The navigation required 15 modifications over time to keep them running. By applying the appropriate pattern a reliable test result can be achieved in end to end regression testing where the test case is driven from the GUI, however with an increase in execution time.

This thesis was created as a helping tool to estimate the price of properties by comparative method, which needs a database of properties. This database is created by a program. The main aim of this thesis is to create an application in Python language, which will search through contents of websites of a chosen real estate portal in Czech Republic. The next aim of this thesis is to create program which will search for real estate according to chosen criteria. The purpose of these criteria is to compare and estimate the price of properties. In the theoretical part of this thesis I will describe data mining and architecture of data mining. In the practical part I will design an aplication and in the end I will implement it. This aplication will go through websites and obtain data about real estate offices, their advertisements and photos of advertisements. For easier work with the output file that contains the advertisements, I created an application for searching individual advertisements based on users specification. This program allows to quickly search for the requested data from the output file. These data are subject to further work, it is possible to analyse them and create interesting statistics and maps.

This diploma thesis deals with automated testing of web applications. First of all, it introduces automated testing and compares it with manual testing, then classifies currently available testing tools and describes Selenium testing tools. In further chapter a methodology for automation of testing of web applications is described, providing a systematic manual, how to automate testing, which mistakes to avoid, and also tasks and responsibilities of involved roles. Appendix of this thesis consists of a user manual for Selenium WebDriver, one of the most popular tools for automated functional testing of web application. This manual guides reader from the basics of using Selenium WebDriver tool to its advanced features and provides complete information set needed for writing automated tests. This thesis represents a complex material that can be used for carrying out a process of test automation using a particular testing tool.

Diploma thesis deals with creating a Methodology for small software projects focused on automated testing of using Selenium WebDriver tool (abbreviated MMSP - Selenium). The created methodology is based on customized methodology MMSP, which aims to transform part for automated testing of using Selenium WebDriver tool through the best principles and practices of already completed studies. Firstly, there will be summarized the most important terms related to the diploma thesis. Then will follow implementation of the methodology MMSP - Selenium, which is complemented by its new roles, tasks, and work products. Personal benefit of the diploma thesis is also created guidelines for Selenium WebDriver testing tool. For great benefit is also considered the publication of the methodology using the Eclipse Process Framework Composer tool. In conclusion of the created methodology verifies the business use cases, aimed at testing the functionality of web application Manuscriptorium.

The aim of the thesis was to design, implement and evaluate the results of automatic tests for the JavaScript Restrictor project, which is being developed as a web browser extension. The tests are divided into three levels - unit, integration, and system. The Unit Tests verify the behavior of individual features, the Integration Tests verify the correct wrapping of browser API endpoints, and the System Tests check that the extension does not suppress the desired functionality of web pages. The System Tests are implemented for parallel execution in a distributed environment which has succeeded in achieving an almost directly proportional reduction in time with respect to the number of the tested nodes. The benefit of this work is detection of previously unknown errors in the JavaScript Restrictor extension and provision of the necessary information that allowed to fix some of the detected bugs.