Zu bedenken ist auch, dass zwei Komponenten, die für sich genommen korrekt gemäß ihrer jeweiligen Teilspezifikation arbeiten, zusammen nicht zwangsläufig eine korrekte Einheit gemäß der Gesamtspezifikation bilden. It is based on evaluating the code to test which line of the code is causing the error. Hochwertige, mehrfach ausgezeichnete digitale Vermögensverwaltung. White-box testing requires internal knowledge of the system and programming skills. Für letzteres benötigt man Black-Box-Tests. Im Gegensatz dazu werden White-Box-Tests mit Blick auf den implementierten Algorithmus entwickelt. Black-box testing is a method of software testing that examines the functionality of an application based on the specifications. White-box testing can be applied at the unit, integration and system levels of the software testing process. D.h. Tests werden ohne Kenntnisse über die innere Funktionsweise/ Implementierung des zu testenden Systems entwickelt. Where white-box testing is design-driven,[1] that is, driven exclusively by agreed specifications of how each component of software is required to behave (as in DO-178C and ISO 26262 processes) then white-box test techniques can accomplish assessment for unimplemented or missing requirements. White box test design is sophisticated, requires relevant programming skills, and the resources who have a thorough knowledge of the application design. Das Programm wird als Black Box behandelt. Spezielle Testabteilungen werden für White-Box-Tests in der Regel nicht eingesetzt, da der Nutzen speziell für diese Aufgabe abgestellter Tester meist durch den Aufwand der Einarbeitung in das System eliminiert wird. The code under test could be rewritten to implement the same functionality in a different way that invalidates the assumptions baked into the test. Kantenüberdeckung wird im Allgemeinen als minimales Testkriterium angesehen. ETF-Depot, Sparpläne, flexible Altersvorsorge, Top-Service & mehr. Gives the programmer introspection because developers carefully describe any new implementation. Takeaways. Once the source code is understood then the source code can be analyzed for test cases to be created. This could result in tests that fail unnecessarily or, in the worst case, tests that now give false positives and mask errors in the code. White box testing is often referenced in the context of Static Application Security Testing (SAST), an approach that checks source code or binaries automatically and provides feedback on bugs and possible vulnerabilities. This ensures the code is good – but doesn’t guarantee it does what users want it to do. Ein Beispiel für einen White-Box-Test ist ablaufbezogenes Testen (Kontrollflussorientierte Testverfahren), bei welchem der Ablaufgraph im Vordergrund steht. White-Box-Tests eignen sich besonders gut, um in Erscheinung getretene Fehler zu lokalisieren, d. h., die fehlerverursachende Komponente zu identifizieren und als Regressionstest ein Wiederauftreten des Fehlers bereits in der Komponente zu vermeiden. In white-box testing an internal perspective of the system, as well as programming skills, are used to design test cases. The main purposes of this type of testing are to test the inner workings of the software, as well as strengthen its security, and improve its usability and design. The following are the three basic steps that white-box testing takes in order to create test cases: White-box testing is one of the two biggest testing methods used today. In penetration testing, white-box testing refers to a method where a white hat hacker has full knowledge of the system being attacked. Gängig sind dabei u. a. folgende Maße (bzw. Since the developers have an in-depth understanding of the project code, they are capable of making the changes in the source code easily and in a small time. Qualitätskriterium des Tests ist es, sicherzustellen, dass Testfälle in Bezug auf die Überdeckung des Quellcodes gewisse Hinlänglichkeitskriterien erfüllen. White-Box-Testing. White-Box-Tests werden eingesetzt, um Fehler in den Teilkomponenten aufzudecken und zu lokalisieren, sind aber aufgrund ihrer Methodik kein geeignetes Werkzeug, Fehler gegenüber der Spezifikation aufzudecken. Processing involves performing risk analysis to guide whole testing process, proper test plan, execute test cases and communicate results. Although traditional testers tended to think of white-box testing as being done at the unit level, it is used for integration and system testing more frequently today. The tester chooses inputs to exercise paths through the code and determine the expected outputs. 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