Black Box test method

In Beijing de run education this period of study I learned a lot of knowledge, including in the past do not know what is software testing, after this two months of system training to know what is software functional testing.

Black-Box testing is also known as functional testing, and it is tested to see if each feature is working properly. In the test, the program as a black box can not be opened, regardless of the internal structure of the program and internal characteristics of the case, in the program interface testing, it only checks whether the program function in accordance with the requirements of the specification of the normal use, the program can properly receive input data and produce the correct output information. Black box testing focuses on the external structure of the program, regardless of the internal logical structure, mainly for the software interface and software function testing.

The effect is that the black box test is based on the user's point of view, from the input data and output data corresponding to the relationship between the test. Obviously, if the external characteristics of the design of the problem or specification is wrong, the black box test method is not found.

Theoretically, the black box test only uses the exhaustive input test, all possible inputs are considered as test cases, in order to find out all the errors in the program. In fact, there are an infinite number of test cases where people are not only testing all legitimate inputs, but also testing for illegal but possible inputs. In this sense, complete testing is not possible, so we have to conduct targeted testing, through the development of test cases to guide the implementation of the test, to ensure that the software testing organized, steps, and planned.

Black-Box test behavior must be quantifiable to truly guarantee software quality, and test cases are one of the methods of quantifying test behavior. Specific black box test case design methods include equivalence class partitioning method, boundary value analysis method, error inference method, causality diagram method, decision table driving method, orthogonal test design method, function diagram method, scene method, etc.

These are the concepts and methods of functional testing. In addition to these are the use of dos,linux systems and common commands, concepts, uses and so on.
DOS is the abbreviation for the English disk Operating system, which means "disk operating system". DOS is a class of operating system on a personal computer. In the 15 years from 1981 until 1995, DOS played an important role in the IBM PC Compatibility Machine market. Also, if you count a subset of DOS-based versions of Microsoft Windows, such as Windows 95, 98, and me, then the business life can be at least 2000 years.

The Linux operating system is a cloning system based on the development of UNIX operating system, it was born in 1991 [Linux desktop] October 5 (This is the first time officially announced). With the help of Internet networks and the concerted efforts of computer enthusiasts around the world, it has become the most widely used UNIX class operating system in the world today, and the number of users is growing rapidly.

In this period of study also done two projects, one is China's logistics financial services Platform and OA Automation Office system, testing the purpose of this system is to meet the requirements of the function of the specification. OA system is a system without requirement specification. Based on these two projects the hands-on operation felt very deep.

Black Box test method