Testing

• What are the 5 components that you test

  Software

  Hardware

  Data

  Interface

  Resulting service
• Component testing, checks each part of a programs functionality
• First 2 component testing sections are hardware and software

  Software is all software, and can include the firmware and OS

  Hardware is all hardware, including external devices such as routers
• The third section is data, this includes any data used, stored, or exchanged. An example is user input or an API
• The fourth section is interface, which covers all interactions. This can be both internal, such as function arguments; or can be external, such as a dark mode button
• The final section is resulting services, this if the end product meets requirements. This can include logic errors in the program, and missing functionalities
• Software component testing:

  • Example: Testing the firmware and OS of a router to ensure they function correctly and securely.
• Hardware component testing:

  • Example: Testing the physical ports and signal strength of a router, as well as its durability and environmental resilience.
• Data component testing:

  • Example: Validating user input data, ensuring the integrity of data transmitted via APIs, and verifying data stored in databases.
• Interfaces component testing:

  • Example: Testing the API endpoints for correct data exchange, and verifying the functionality of a user interface button like a dark mode toggle.
• Resulting Services component testing:

  • Example: Ensuring that a router provides stable internet connectivity, meets performance benchmarks, and all its features (such as firewall protection) work as expected.
• When testing a program you can use many methodologies. Each methodology is suitable for different issues, and are all used before deploying a program
• CUBIP LARS represents all the main testing methodologies:

  Concept

  Unit

  BOundary

  Integration

  Performance

  Load

  Acceptance

  Regression

  System
• Concept testing is done early in a projects lifecycle and determines feasibility
• Unit testing test individual components of code to test functionality
• Boundary testing tests upper and lower limits of values that system can handle
• Integration testing test the how the modules of a system can work together
• Performance testing evaluates the performance of a system in normal conditions
• System testing tests the whole system on a representative device, of the end systems deployment
• Acceptance testing verifies if the program meets client requirements and ease of use
• Regression testing tests a programs compatibility with older versions of dependencies
• Load testing tests the ability of a program to handle a large number of users simultaneously
• Root cause analysis helps people find out why a problem occurred in the first place.
• RCA has 3 specific steps:

  Work out

  What happened

  Why it happened

  How to prevent it
• What is the purpose of RCA?


  To prevent a problem from happening again
• 5 why's approach is composed of 7 steps and in simple terms the steps are?

  Gather a qualified team

  Understand problem as cause of issue

  Ask why the orginal cause happened

  ASk the same question until fully broken down

  Identify the final useful answer as the root cause

  Address the root cause

  Consider the effectiveness of the solution overtime
• Test plans assess how well a program functions and how well it meets the requirements.
• You created a test plan for esp task 2, the columns should be:

  TestID

  Test description

  Test data

  Expected outcome

  Actual outcome

  Result
• There are 2 main types of data

  Valid, which is data that should work including the inner boundary

  INvalid, which is data that shouldn't work including outer boundary and erroneous
• A constraint of a program is a restraint on data coming
• 6 data validation types?

  Range

  Length

  Type

  Presence

  Format

  Checksum digits
• Range checks, check if a value is in a range

  length checks, check if a value is of a certain length

  Type checks, check if a value is of a certain type
• Presence checks if a value is present
• Format checks check if a value meets a certain format
• Checksum digits checks, use a checksum formula and a checksum digit to check if data is assured