CN102693182A - Repository mode using test-driven development in MVC (model view controller) - Google Patents

Abstract

The invention discloses a repository mode using test-driven development in an MVC (model view controller). If the repository mode with the MVC and the test-driven development is used, a tester needs to build an interface for a data access class. When a controller method is subjected to a unit test, a mock repository can be instantiated according to the interface to simulate the operations of adding, revising, deleting and inquiring the data in the practical operation process. When the repository mode carries out the unit test, a real database server is not required; for the unit test for editing and deleting data, a clean database environment does not need to be prepared when each round of unit test is performed; a substitution point is provided for the unit test; and service logic can be easily tested without the database or other external dependencies.

Description

A kind of in MVC the thesaurus pattern of use test drive development

 

Technical field

The present invention relates to the method for a kind of use test drive development (TDD), be specifically related to a kind of in MVC the thesaurus pattern of use test drive development.

Background technology

At present in the unit testing of MVC, when controller method is carried out unit testing, when relating to the interpolation of calling data access, modification, deletion, inquiry, often need real database server support, could normal operation unit testing code.Through analysis, find to exist the problem that inconvenience realizes to unit testing in the past.

Its particular problem comprises:

When 1, at first performance element is tested, need real database server support;

2, the unit testing of editor and deleted data will be changed the state of database, and this just needs each unit testing of taking turns all to have the clean data lab environment;

3, when controller method is carried out unit testing, if need call certain method in another type in the method to be tested, and needs obtain the rreturn value of this method, the ability correct execution.If invoked method is not exploitation completion for a certain reason, in this case, want the method is tested, can only wait for type of being called exploitation completion.

Summary of the invention

Invention provide a kind of in MVC the thesaurus pattern of use test drive development; Purpose is to solve the dependence of unit testing to True Data storehouse and other external modules; A kind of novel interim thesaurus pattern is provided, dirigibility, the testability of bigger optimization unit testing.

The apprizing system of appearance treatment plant reaches above-mentioned technique effect for realizing above-mentioned technical purpose, and the present invention realizes through following technical scheme:

A kind of in MVC the thesaurus pattern of use test drive development, it is characterized in that, may further comprise the steps:

Step 1) is added thesaurus, the interface of an accessing database of definition;

Step 2) creates test and drive, realize the mock thesaurus;

Step 3) is added the test class support, two constructed fuctions of definition in the target test class;

First constructed fuction is the printenv constructed fuction, and second constructed fuction adopted the parameter of IContactRepository type, and said second constructed fuction will import said mock thesaurus into by unit testing; Said first constructed fuction will be created the instance of EF_ContactRepository class, and during method of operating in calling controller, the MVC pipeline will call said first constructed fuction;

Step 4) is added test, in said test class, writes method of testing, calls said second constructed fuction.

Principle of the present invention is:

The present invention uses has the thesaurus pattern of MVC and TDD, needs the tester to create interface for the data access class; When controller method is carried out unit testing, can go to simulate the interpolation to data, modification, deletion, inquiry in the actual moving process according to interface instance mock thesaurus.

Adopt one of principle of the TDD of MVC to be, a particular requirement in the driving operations method is answered in each test, and test should not verified database or other assemblies (be placed on these assemblies in unit testing and the integration testing of data access as far as possible and test).

The invention has the beneficial effects as follows:

When 1, performance element is tested, do not need real database server;

2, the unit testing of editor and deleted data need not prepared the clean data lab environment when carrying out each wheel unit test;

3, for unit testing provides substitution point, test service logic and need not database and other outside rely on like a cork.

Description of drawings

Fig. 1 is a process flow diagram of the present invention.

Embodiment

Below with reference to accompanying drawing and combine embodiment, specify the present invention.

Referring to shown in Figure 1, a kind of in MVC the thesaurus pattern of use test drive development, may further comprise the steps:

Step 1) is added thesaurus:

Use has the thesaurus pattern of MVC and TDD (TDD), needs the tester to create interface for the data access class.When controller method is carried out unit testing, can go to simulate the interpolation to data, modification, deletion, inquiry in the actual moving process according to interface instance mock thesaurus.

The interface of an accessing database of definition:

1.public?interface?IContactRepository

2.{

3.?void?CreateNewContact(Contact?contactToCreate);

4. void?DeleteContact(int?id);

5. Contact?GetContactByID(int?id);

6. IEnumerable<Contact>?GetAllContacts();

7. int?SaveChanges();

8.}

Step 2) create test and drive, realize the mock thesaurus:

1.class?InMemoryContactRepository?:?IContactRepository

2.{

3. private?List<Contact>?_db?=?new?List<Contact>();

4. public?Exception?ExceptionToThrow?{?get;?set;?}

5. public?void?SaveChanges(Contact?contactToUpdate)?{}

6. public?void?Add(Contact?contactToAdd)?{}

7. public?Contact?GetContactByID(int?id)?{}

8. public?void?CreateNewContact(Contact?contactToCreate)?{}

public?int?SaveChanges()?{}

9. public?IEnumerable<Contact>?GetAllContacts()?{}

10. public?void?DeleteContact(int?id)?{}

11.}

Step 3) is added test support, two constructed fuctions of definition in the target test class:

1.public?HomeController()?:?this(new?EF_ContactRepository())?{?}

2.public?HomeController(IContactRepository?repository)

3.{

4. _repository?=?repository;

5.}

One is the printenv constructed fuction; Another constructed fuction has adopted the parameter of IContactRepository type, and this constructed fuction will import the mock thesaurus into by unit testing.The printenv constructed fuction will be created the instance of EF_ContactRepository class, and during method of operating in calling controller, the MVC pipeline will call this constructed fuction.

Step 4) is added test:

Adopt one of principle of the TDD of MVC to be, a particular requirement in the driving operations method is answered in each test, and test should not verified database or other assemblies (be placed on these assemblies in unit testing and the integration testing of data access as far as possible and test).

In test class, write method of testing, call the ginseng constructed fuction (having adopted the parameter of IContactRepository type) that has to be tested type.

1.private?static?HomeController?GetHomeController(IContactRepository?repository)?{…}

Write method of testing

1.[TestMethod]

2.public?void?CreateTest?()?{…}

In sum, adopting the TDD of MVC is that unit testing provides substitution point, and the tester is the test service logic like a cork, and need not database and other outside items that relies on.

The foregoing description just is to let the one of ordinary skilled in the art can understand content of the present invention and enforcement according to this in order technical conceive of the present invention and characteristics to be described, to be its objective is, can not limit protection scope of the present invention with this.The variation or the modification of every equivalence that the essence of content has been done according to the present invention all should be encompassed in protection scope of the present invention.

Claims (1)

1. the thesaurus pattern of a use test drive development in MVC is characterized in that, may further comprise the steps:

Step 1) is added thesaurus, the interface of an accessing database of definition;

Step 2) creates test and drive, realize the mock thesaurus;

Step 3) is added the test class support, two constructed fuctions of definition in the target test class;

First constructed fuction is the printenv constructed fuction, and second constructed fuction adopted the parameter of IContactRepository type, and said second constructed fuction will import said mock thesaurus into by unit testing; Said first constructed fuction will be created the instance of EF_ContactRepository class, and during method of operating in calling controller, the MVC pipeline will call said first constructed fuction;

Step 4) is added test, in said test class, writes method of testing, calls said second constructed fuction.

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