Unit Testing - Reading Assignment

Blockchain Business Course
#161

  • **What is Unit Testing?
    Unit testing is testing separate units of work.

  • Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behaviour of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task. Why is unit testing important for refactoring?
    To at least conclude that the area that is changed is still working correctly.

  • How does Unit Testing help the bottom-up testing approach?
    You first start with unit testing when something is developed. After that integration testing is triggered and finally acceptance testing. So you see you start small with testing and after that the complete process is tested.

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#162

  1. What is Unit Testing?
    It is a method thorough which tests are run for individual elements of a source code to identify if their purpose is fit.

  2. Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behaviour of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task. Why is unit testing important for refactoring?
    Unit testing plays a role of validating whether functionalities are kept unchanged after refactoring.

  3. How does Unit Testing help the bottom-up testing approach?
    Using this approach, unit testing permits rectifying source codes linked to individual units and therefore reducing redundancies in the bottom-up testing. Thus, integration testing becomes more fluid by fixing the bugs after unit tests are run.

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#163

  1. What is Unit Testing?
    Unit testing pretend to divide the source code of an application into small units of codes that constitute a smallest testable part of the application.

  2. Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behaviour of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task. Why is unit testing important for refactoring?

Because most of the time a simple error or malfunction of a unit of code affects the performance of the whole application, that is why a Unit testing give the programmer the opportunity to keep testing codes per unit and be sure that are working perfectly.

  1. How does Unit Testing help the bottom-up testing approach?

By testing the parts of a program first and then testing the sum of its parts, integration testing becomes much easier.

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#164

  1. Unit testing is a method by which individual units of source code are tested to determine if they are fit for use. A unit is the smallest testable part of an application. In procedural programming a unit may be an individual function or procedure.

  2. Because it ensures that each individual part of the program is correct.

  3. It helps reduce uncertainty in the units.

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#165

Unit Testing - Reading Assignment

1. What is Unit Testing?

  • Unit testing is the process of writing code to test the behaviour and functionality of your system. It is essentially, testing bits of your code in isolation with test code.

The immediate advantages that come to mind are:

  • Running the tests becomes automate-able and repeatable

  • You can test at a much more granular detailed level

2. Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behaviour of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task.
Why is unit testing important for refactoring?

  • As we said above; A unit test is an automated piece of code that invokes a different method and then checks some assumptions about the logical behaviour of the codes.

  • Refactoring can be done after writing several tests, or after each test. It is the act of changing a piece of code without changing its functionality.

  • This process will help to quickly identify problems and facilitate any change in the source code.

3. How does Unit Testing help the bottom-up testing approach?

  • Bottom-up testing is an approach to integrated testing where the lowest level components are tested first, then used to facilitate the testing of higher level components. The process is repeated until the component at the top of the hierarchy is tested.

  • In top-down approach, testing can start only after the top-level modules have been coded and unit tested.

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#166

  1. Unit testing is a testing the smallest testable part of an application. By unit testing, the developer learns its functionality and its API. This will also show the unitā€™s characteristics of appropriate and inappropriate use and negative behaviour that are trapped by units.

  2. Unit test is important for Refacotring to ensure that the code still have the same function and behaviour as originally desingned.

  3. Unit testing makes the bottom up testing approach easier, because before the integration test, each components has been tested and known. Also unit test can be automated whereas, the integration test on high level or global scope relies still heavily on manual testing.

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#167

Excellent answers sir, well documented! Please keep them like that :muscle:

Carlos Z.

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#168
  1. A method determining whether certain sections of code work properly/are fit for use
  2. When refactoring, errors can occur in other parts of the program. Unit testing at every step helps pinpoint those errors.
  3. Testing is easier when parts all work by themselves, so integrating them is more seamless
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#169
  1. Unit testing is basically testing individual components/parts to detect failures of the smallest unit before putting it all together. Like checking each lego brick before building a big tower with it, to make sure it doesnā€™t collapse later due to a faulty brick.
    2.In changing the code certain links which existed before may be broken and while the unit itself may run more efficient, others may be affected by the changes.
  2. By unit testing, the error detection will come a lot earlier, resulting in shorter analytics to find a certain error. It also avoids large parts of code having to be redone because of mistakes that could have been detected early on.
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#170

  1. Unit Testing is a method by which units of code are tested individually to determine if they are fit for use.

  2. Unit Testing is important for refactoring because it makes sure the programmer hasnā€™t made a change which alters the behaviour of the program.

  3. Unit Testing helps with the bottom-up testing approach because it only tests one part of a program at a time. By testing individual parts, it makes the integration testing easier because any errors can be spotted easily and immediately, pin-pointed to the unit just tested and then corrected before integration.

#171

  1. testing individual parts of the code like testing a module, function, the smallest testable unit of a development.

  2. important to ensure it still works like before without any errors.

  3. 1st = test integration, without doing the unit test in the first place can lead to complications. As one does not now what part of program the erros is coming.

#172

What is Unit Testing?
In computer programming, unit testing is a method by which individual units of source code are tested to determine if they are fit for use.

Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behaviour of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task. Why is unit testing important for refactoring?
The procedure is to write test cases for all functions and methods so that whenever a change causes a fault, it can be quickly identified and fixed. Readily-available unit tests make it easy for the programmer to check whether a piece of code is still working properly.
How does Unit Testing help the bottom-up testing approach?
By testing the parts of a program first and then testing the sum of its parts, integration testing becomes much easier. Unit testing may reduce uncertainty in the units themselves and can be used in a bottom-up testing style approach.

#173

  1. What is Unit Testing?
    Method by which individual units of source code are tested to determine if they are fit for use

  2. Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behavior of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task. Why is unit testing important for refactoring?
    So you donā€™t break the rest of the code and that errors are introduced.

  3. How does Unit Testing help the bottom-up testing approach
    Because unit testing breaks the components down at function level, where they are tested individually before introduced to the main source.

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#174
  1. What is Unit Testing?

Is a method where individual units of source code are tested to see if they are fit for use.

  1. Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behaviour of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task. Why is unit testing important for refactoring?

so u look at only small parts of the code, tobe certain that they are right. So you should be faster finde the code which is not right.

  1. How does Unit Testing help the bottom-up testing approach?
    By testing the parts of a program first and then testing the sum of its parts.
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#175

1)What is Unit Testing?
unit testing is a method where individual units of source code
are tested to determine if they are ā€œbug-freeā€.
A unit is the smallest testable part of an application.

2)Refactoring means that you change and (hopefully) improve the internal structure
of the code without changing the behaviour of the code. For example, developers may
change a piece of code in order to make the code run faster but still perform the same task.
Why is unit testing important for refactoring?
Because if other entities are affected by refactoring these modifications can be reversed?:
"
Unit testing allows the programmer to refactor code at a later date, and make sure the module still works correctly (e.g., in regression testing)."

3)How does Unit Testing help the bottom-up testing approach?
if smaller puzzle-parts of code work after unit testing (no bugs), this might be a better approach than testing the whole thing?

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#176

  1. ā€œIn computer programming, unit testing is a method by which individual units of source code are tested to determine if they are fit for use. A unit is the smallest testable part of an application. In procedural programming a unit may be an individual function or procedure. Unit tests are created by programmers or occasionally by white box testersā€¦Unit tests are typically written and run by software developers to ensure that code meets its design and behaves as intended. Its implementation can vary from being very manual (pencil and paper) to being formalized as part of build automation.ā€
    ā€œThe goal of unit testing is to isolate each part of the program and show that the individual parts are correct.[2] A unit test provides a strict, written contract that the piece of code must satisfy. As a result, it affords several benefits. Unit tests find problems early in the development cycle.ā€

  2. Unit testing allows the programmer to refactor (change and hopefully improve the internal structure of the code without changing the behavior of the code) the code at a later date, and make sure the module still works correctly.

  3. ā€œUnit testing may reduce uncertainty in the units themselves and can be used in a bottom-up testing style approach. By testing the parts of a program first and then testing the sum of its parts, integration testing becomes much easier.ā€

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#177

[quote=ā€œivan, post:1, topic:6437ā€]

  • What is Unit Testing?
    It is a method by which individual units of source code are tested to determine if they are fit for use.
  • Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behaviour of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task. Why is unit testing important for refactoring?
    It is important because it reduces costs and identifies if there are bugs before deployment.
  • How does Unit Testing help the bottom-up testing approach? The unit testing help in the bottom up approach because it tests the lower level modules first to see if there would be any bugs up the line. Errors/bugs are easier to identify by doing unit testing using the bottom up testing approach
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#178

1:It is testing of separate components of codes for a system before integrating it in the total system

2:It confirms if the code change do not affect in a negative way the program.Although improvements in one action is improved integrating the unit in the system may cause problems somewhere else

3: It confirms that the smallest units are functioning before integrating them in the complete program Integration testing will be easier

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#179

What is Unit Testing?
Testing specific areas of an application in isolation

Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behaviour of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task. Why is unit testing important for refactoring?
Unit testing can isolate a problem to a particular area and deal with it at source without changing the code as a whole.

How does Unit Testing help the bottom-up testing approach?
Testing individual parts first before integrating them greatly simplifies the testing process as a whole

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#180

  1. What is Unit Testing?
    A unit is the smallest testable component of an application e.g. a function or procedure. Unit testing involves running a specific unit of code to see if it is fit for use (it should give the right output for the given input)

  2. Refactoring means that you change and (hopefully) improve the internal structure of the code without changing the behaviour of the code. For example, developers may change a piece of code in order to make the code run faster but still perform the same task. Why is unit testing important for refactoring?
    Unit testing is important for refactoring because if you know that all components are working individually but there is some bug during refactoring, you can reduce the scope of where to look for bugs.

  3. How does Unit Testing help the bottom-up testing approach?
    If each unit component is tested separately first to ensure they work, then it is easier to test the codebase as a whole and run integration testing

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