Integration Testing - Reading Assignment

[zinovsky]

All links of the article are not working or outdated

What is integration testing or integration and testing (I&T) ? -...

I just googled for other articles online, to answer these questions

1. Why do we write integration tests?
   To verify that the components works as expected individually and also when are integrated. The main aim here is to test the interface between the components.

2. What problems do integration tests solve?
   It detects issues like data formatting, error trapping, hardware interfaces

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

In Top-down approach we test first the top level code and then we go step by step down in code units
For Bottom-Down approach i couldn` t find anything online, if you mean the Bottom-up approach then the meaning is that the components at lower hierarchy are tested first, then we test the upon components that rely to the lower one.

[welowy]

1. To make sure that components correctly work together.

2. Identify if there are any issues between components.

3. In top-down testing, the highest-level modules are tested first and progressively lower-level modules are tested after. The bottom-up process starts with unit testing followed by progressively higher level tests of combinations of units otherwise known as builds

[Kapo]

1. Why do we write integration tests?

• In this context, a unit is defined as the smallest testable part of an application. Integration tests are written and executed for functional interactions which typically crosses boundaries, to expose problems with the interfaces among program components before trouble occurs in real-world program execution.

2. What problems do integration tests solve?

• They identify problems with the way different program components interact with each other.

• Integration tests and unit tests both test the functionality of software, but they alone cannot replace functional testing.

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

There are two major ways of carrying out an integration test:

The bottom-up method and the top-down method.

• 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.

• In a comprehensive software development environment, bottom-up testing is usually done first, followed by top-down testing. The process concludes with multiple tests of the complete application.

[IZUMI]

1.We write the integration test, in order to expose faults in the interaction between integrated units before the system testing.

2. Integration test solve the unexpected errors in functions of combined components before real world program execution.

3.Bottom up approach is test starts from units of lowest level of hierarchy and progressively to higher level. Top down is to first test top integrated module then test the branch modules step by step till the end of related module.

[thecil]

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

Carlos Z.

[filip4900]

1. To make sure units, combined, work together to produce the desired outcome
2. When errors occur not in the individual code elements, but in the complete application
3. Top-down starts at higher level of software, then tests down to units. Bottom-up starts with unit testing and then goes up to integration testing.

[Arvee8]

@ivan

• Why do we write integration tests?
• What problems do integration tests solve?
• What are the differences between top-down and bottom-down approaches?

1. Integration tests are test of the various units/modules once they have been brought together, and tests the interoperability of those various units
2. Integration tests will step by step bring together various units to test their interfaces and detect any issues between them.
3. Bottom-up testing is the typical step by step approach when various units are brought together. In top-down testing, the overall operation is tested and gradually flows down into individual modules

@Ivan - I assume you made a mistake in 3rd question. I guess that is supposed to be “bottom-up” in stead of “bottom-down”

[Brijay]

1. Integration tests are written in order to check for any problems with the interfaces among program components before the programs are used for real.

2. Integration tests solve problems with the way different components work with each other.

3. Bottom-up integration testing begins with unit testing, followed by tests of progressively higher level combinations of units. In top-down integration testing, the higher level modules are tested first, and progressively lower level modules are tested after that.

[Diego_BM]

1. because we want the test all the code wich make the application & also the nterfaces linking all the components together.

2. what problem do integration tests solve? inter operability between systems to expose problems with the interfaces among program components before they occur.

3. top down starts high level funct. test cases or user scenarios. bottum up integration testing beguns with unit testing. followed by tests of progreessively higher level tests of combinations of units otherwise known as builds.

[Mr_Lundholm]

Why do we write integration tests?
Integration tests is written to make sure that components correctly work together. These tests are written to expose problems with the interfaces among program components before trouble occurs in real-world program execution.

What problems do integration tests solve?
They identify problems with the way different program components interact with each other, namely identifying if there are any issues between components.

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

The bottom-up process starts with unit testing followed by progressively higher level tests of combinations of units otherwise known as modules or builds. Top-down integration testing is the opposite, the highest-level modules are tested first and progressively lower-level modules are tested thereafter.

[ashishc]

• Why do we write integration tests?
  So that we can expose any problem with the interface among program components which may arise before the problem occurs in real world situation.
• What problems do integration tests solve?
  They find errors that happens while using applications. They test the whether the interfaces are working individually and together.
• What are the differences between top-down and bottom-down approaches?
  Bottom-up integration testing begins with unit testing, followed by tests of of progressively higher-level combinations of units and In top-down integration testing, the highest-level modules are tested first and progressively lower-level modules are tested after that.

[WesselVosloo]

1. Why do we write integration tests?
   Program units are combined and tested as groups in multiple ways.

2. What problems do integration tests solve?
   Expose problems with the interfaces among program components before trouble occurs in real-world program execution.

3. What are the differences between top-down and bottom-down 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.

[Chris78]

1. Why do we write integration tests?
   to check wether the whole code works together aswell
2. What problems do integration tests solve?
   it checks whether all parts of the code work together as planed
3. What are the differences between top-down and bottom-down approaches?
   top-down- testing the whole code and the going down to the different parts of the code
   bottom-down- staring with parts of the code before testing the whole code

[Steffen]

1)Why do we write integration tests?
that means units were combined to packages, these so called modules or builds were tested as they work in combination.
the next bigger compartiment is then a module. this is the bottom-up approach of unit testing.

2)What problems do integration tests solve?
they are used to detect problems if units interact with each other.

3)What are the differences between top-down and bottom-down approaches?
top down means an analytic approach of testing beginning with the builds to the units
bottom up is a synthetic approach of testing beginning with the units to the builds

[Drew_Mackey]

1. Integration testing concentrates on verifying the interactions between the parts of the whole. In this context, a unit is defined as the smallest testable part of an application.

2. Integration testing can expose problems with the interfaces among program components before trouble occurs in real-world program execution.

3. There are two major ways of carrying out an integration test, called the bottom-up method and the top-down method. Bottom-up integration testing begins with unit testing, followed by tests 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.
   In a comprehensive software development environment, bottom-up testing is usually done first, followed by top-down testing. The process concludes with multiple tests of the complete application, preferably in scenarios designed to mimic those it will encounter in customers’ computers, systems, and networks.

[wtraveller]

1: To find out if conflicts are present between you combine modules assembled from units in a test environment to be able to detect possible issues before final assemble the modules in the final product

2:Mic communication between different interfaces and components from different suppliers can be identified

3: In top down testing the tests start from the bigger module to the smaller ones. In bottom up it it is the opposite starting from the smaller to the bigger modules

[Crypto_Mark_007]

[quote=“ivan, post:1, topic:6441”]

• Why do we write integration tests?
  Integration tests are written to test that everything works fine together before they are published live
• What problems do integration tests solve?
  Things may work fine with individual unit tests but an integration test will confirm if all the program component work with each other.
• 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. The opposite is with the bottom-up method where begins with unit testing followed by tests of a progressively higher-level combinations of units called modules or builds. In a more comprehensive software development environment, bottom-up testing is usually done first, followed by top-down testing.

[Irina_Karagyaur]

1. Why do we write integration tests?
   Integration testing, also known as integration and testing (I&T), is a [software development process which program units are combined and tested as groups in multiple ways. In this context, a unit is defined as the smallest testable part of an [application]. Integration testing is a component of Extreme Programming, a pragmatic method of software development that takes a meticulous approach to building a product by means of continual testing and revision.
2. What problems do integration tests solve?
   Integration testing can expose problems with the [interfaces]among program components before trouble occurs in real-world program execution.
3. What are the differences between top-down and bottom-down 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.

[Jazmin]

1. Why do we write integration tests?
   To expose faults in the interfaces and interaction between integrated unit components of code

2. What problems do integration tests solve?
   It can identify issues that might occur in real world use, this could be errors related to the interface or interactions between the interfaces and the API

3. What are the differences between top-down and bottom-up approaches?
   Top down means that top level units are tested first and lower level units tested step by step after that
   Bottom up starts with smallest unit component, working up to combinations of units (modules)

[BenObi]

1. Why do we write integration tests?
   Putting together the units can cause problems. We need to test clusters of units to see their interaction.
2. What problems do integration tests solve?
   Real world problems instead of the problems that occur only in a unit
3. What are the differences between top-down and bottom-down approaches?
   Integration is top, unit is down. Testing from the big picture to the pixel or vice versa