Integration Testing - Reading Assignment

Blockchain Business Course
#443

  1. Why do we write integration tests?
    To test program units in multiple ways so problems between each unit can be filtered out and each part works as a whole.

  2. What problems do integration tests solve?
    Integration issues between different units.

  3. What are the differences between top-down and bottom-up approaches?
    Bottom up starts with individual units testing. Then works its way up to the top by testing higher level units and combinations. Top down tests the software/product the other way around. More as a whole from an end-user perspective and then works its way down to lower level combinations of units.

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#444
  1. Why do we write integration tests?
    To test combined units and to test in groups in multiple ways.
  2. What problems do integration tests solve?
    It finds bugs when combining different units.
  3. What are the differences between top-down and bottom-up approaches?
    In top-down integration testing, the highest-level modules are tested first and progressively lower-level modules are tested after that.
    Bottom up begins with unit testing, followed by tests of of progressively higher-level combinations of units called modules or builds.
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#445
  1. You write integration tests to ensure that different units of a program work together as intended
  2. Integration tests can find interaction or communication bugs between different parts of a program, which is especially helpful if multiple programmers work on the same program
  3. In a bottom-up approach you start with testing the smallest testable parts of an application and progressively test higher-order combinations of those parts. In a top-down approach you do it the other way round.
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#446
  1. In order to ensure that programm units also work as expected when combined and not treated as singular unit.
  2. Problems that become visible and appear when combining units, which is the next step after testing the individual functionality of units
  3. Bottom-up integration testing begins with unit testing, followed by tests of a progressively higher-level combinations of units called modules or builds. Top-down integration testing, the highest level modules are tested first and progressively lower level modules are tested after.
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#447

  1. Why do we write integration tests?
    To expose problems with the interfaces among program components before trouble occurs in real-world program execution.

  2. What problems do integration tests solve?
    It can find communication bugs that are caused by different parts of code.

  3. What are the differences between top-down and bottom-up approaches?
    Bottom-up integration testing begins with unit testing, followed by tests of of progressively higher-level combinations of units called modules or builds. In top-down integration testing, the highest-level modules are tested first and progressively lower-level modules are tested after that.

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#448
  1. to ensure right from start proper functionality and expose errors among program components
  2. problem with the code, APIs
  3. top-down represents the assessment from larger to smaller components of the system and bottom up represents the assessment from smaller to larger components of the system
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#449
  1. To verify the functionality, performance and reliability of units acting as an integrated whole.
  2. Integration tests help confirm the interactions between a programs integrated components.
  3. Bottom-up approach starts testing with the smallest unit and expands to test higher elements of the program. Top-down approach starts with the highest level of the program and proceeds to test smaller and smaller elements.
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#450
  • Why do we write integration tests?
    to determine problems with the unit and or its links to interfaces
  • What problems do integration tests solve?
    detects disruption in code nad can check if unit fits with interface
  • What are the differences between top-down and bottom-up approaches?
    Top down starts with end product and works down . Top up starts with unit testing to end product
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#451
  1. Why do we write integration tests?
  • To find out how different components work together.
  1. What problems do integration tests solve?
  • It allows us to see how the whole program works together, and if there is any incompatibility between the components.
  1. What are the differences between top-down and bottom-up approaches?
  • Top-down means testing the whole program, then a section of it, then a component of that section.
  • Bottom-up means testing the smallest unit, then a section of units, then a larger section and finally the whole program.
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#452
  1. to find out if components work together
  2. They check interoperability of different units/components. That communication between different parts of code work
  3. Top down perception is to start from end user view, that software works as whole. Where as bottom down check that smallest parts of code work as expected.
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#453
  1. Why do we write integration tests?
  • Integration tests verify the correct behavior of the different modules of a system when they work together.
  1. What problems do integration tests solve?
  • It ensures that the different parts of the system actually can work together.
  1. What are the differences between top-down and bottom-up approaches?
  • In the “bottom-up” approach we test the smallest testable units of code in an isolated manner and after that we proceed towards testing ever bigger parts of the program/system and the interactions between them.
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#454
  1. Why do we write integration tests?
    To check interoperability between systems, to expose problems with the interfaces among program components before they occur.
  2. What problems do integration tests solve?
    They identify problems with the way different program components interact with each other.
  3. What are the differences between top-down and bottom-up approaches?
    In top-down integration testing, the highest-level modules are tested first and progressively lower-level modules are tested after that. Bottom-up integration testing begins with unit testing, followed by tests of progressively higher-level combinations of units called modules or builds.
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#455

  1. To identify any potential problems with the application interface among program components before any actual error occurs in real-world program execution.

  2. To identify any potential problems with the application interface among program components before any actual error occurs in real-world program execution.

  3. Top-down approach has the highest-level of units (modules) get tested first and then progressively to lower-level modules. Bottom-up approach has the testing begins with unit testing, followed by tests of progressively higher-level combinations of units (modules/builds).

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#456
  1. to test all parts of code individualy.
  2. they test weather each individual pice of code for faults.
    3.using the bottom up approach means testing smaller individual functions for faults, top down means testing the whole application works.
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#457

1.To test all code that makes up the application combined with all the interfaces linking all the components together. Individual modules are combined and tested as a group to evaluate the compliance of a system or a component with specified functional requirements.
2. The purpose of this level of testing is to expose defects in the interaction between these software modules when they are integrated. Integration Testing is necessary to verify the software modules work in unity when live. At the time of module development, there are wide chances of change in requirements by the clients. These new requirements may not be unit tested and hence system integration Testing becomes necessary. Interfaces of the software modules with the database could be erroneous
External Hardware interfaces, if any, could be erroneous
Inadequate exception handling could cause issues.
3.Top down and bottom up are both incremental approaches to testing whenever the modules are available incrementally. Bottom-up Integration Testing is a strategy in which the lower level modules are tested first. These tested modules are then further used to facilitate the testing of higher level modules. The process continues until all modules at top level are tested. Once the lower level modules are tested and integrated, then the next level of modules are formed. .
Top Down Integration Testing is a strategy in which integration testing takes place from top to bottom following the control flow of software system. The higher level modules are tested first and then lower level modules are tested and integrated in order to check the software functionality. Stubs are used for testing if some modules are not ready.
Stubs and Drivers are the dummy programs in Integration testing used to facilitate the software testing activity. These programs act as a substitute for the missing models in the testing. They do not implement the entire programming logic of the software module but they simulate data communication with the calling module while testing.
Stub: Is called by the Module under Test.
Driver: Calls the Module to be tested.

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#458

We write integration tests to check whether program units function correctly when combined.

Integration tests expose problems with the interfaces among program components. So they solve the problem of unknown combination problems.

Bottom-up integration testing begins with unit testing , followed by tests of of progressively higher-level combinations of units called modules or builds.

In top-down integration testing, the highest-level modules are tested first and progressively lower-level modules are tested after that.

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#459

  1. Why do we write integration tests?
    To make sure that different components of the code work together.

  2. What problems do integration tests solve?
    It finds communication bugs and errors that could have been caused by different programmers or even companies working on different sections of the code.

  3. What are the differences between top-down and bottom-down approaches?
    Top-down starts by testing of main functions and modules, and works downward. Bottom-up starts with unit testing individual functions, and works upward.

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#460
  1. Why do we write integration tests?
    to verify if there are problems with interfaces because they are actually executed
  2. What problems do integration tests solve?
    it exposes potential problems between program components
  3. What are the differences between top-down and bottom-up approaches?
    in top down the highest level modules are tested first. In bottom up, the lower units are tested first.
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#461

  • Why do we write integration tests?
    To expose problems of the interface among program components before real world use.

  • What problems do integration tests solve?
    Integration tests expose problems of the interface among program components before real world use.

  • What are the differences between top-down and bottom-up approaches?
    Bottom-up focuses on unit testing first then focuses on different combinations of units called modules. The top-down approach is just the opposite.

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#462
  1. Why do we write integration tests?

To ensure various combinations of units will work together as they should.

  1. What problems do integration tests solve?

Problems that may occur with the interface components before problems with real world program execution.

  1. What are the differences between top-down and bottom-up approaches?

The top down approach works with the complex combinations and groups of units and modules working together, to the smallest unit test last and bottom up does the opposite.

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