Unit testing 实体框架集成测试DropCreateDatabase始终不在测试之间清除数据库
我正在编写一组集成测试(使用MS Test进行单元测试,测试Entity Framework 4.2是否将所有类正确地持久化到数据库) 当我一个接一个地运行所有测试时,它们都工作得很好。当我在一个组中运行它们时——其中一些由于返回的对象数量错误而失败——看起来db在测试开始时被清理了一次,而不是在每个测试之间——尽管我可以看到创建了一个新的上下文,然后为每个测试处理了它 有什么想法吗Unit testing 实体框架集成测试DropCreateDatabase始终不在测试之间清除数据库,unit-testing,entity-framework-4.1,Unit Testing,Entity Framework 4.1,我正在编写一组集成测试(使用MS Test进行单元测试,测试Entity Framework 4.2是否将所有类正确地持久化到数据库) 当我一个接一个地运行所有测试时,它们都工作得很好。当我在一个组中运行它们时——其中一些由于返回的对象数量错误而失败——看起来db在测试开始时被清理了一次,而不是在每个测试之间——尽管我可以看到创建了一个新的上下文,然后为每个测试处理了它 有什么想法吗 public class EmptyDataInitializer : DropCreateDatabaseAl
public class EmptyDataInitializer : DropCreateDatabaseAlways<myContext>
{
protected override void Seed(myContext db)
{
//Do Nothing Create Empty Database
db.SaveChanges();
base.Seed(db);
}
}
公共类EmptyDataInitializer:DropCreateDatabaseAlways
{
受保护的覆盖无效种子(myContext db)
{
//不执行任何操作创建空数据库
db.SaveChanges();
基部种子(db);
}
}
单元/集成测试的精简版本
[TestClass]
public class PersistanceTests
{
//Creating two instances of our Repository so that we can make sure that we are reading from our database rather than in-memory
private myContext _db;
private myContext _dbResults;
private readonly ISettings _configSettings;
public PersistanceTests()
{
_configSettings = MockRepository.GenerateStub<ISettings>();
_configSettings.ConnectionString = "data source=.;initial catalog=myContext_Test; Integrated Security=SSPI; Pooling=false";
Database.SetInitializer(new EmptyDataInitializer());
}
//This is called a single time after the last test has finished executing
[TestCleanup]
public void TearDownTest()
{
_db.Dispose();
_db = null;
_dbResults.Dispose();
_dbResults = null;
}
//This is called each time prior to a test being run
[TestInitialize]
public void SetupTest()
{
_db = new myContext(_configSettings);
_dbResults = new myContext(_configSettings);
// This forces the database to initialise at this point with the initialization data / Empty DB
var count = _db.Accounts.Count();
var resultCount = _dbResults.Accounts.Count();
if (count != resultCount) throw new InvalidOperationException("We do not have a consistant DB experiance.");
}
[TestMethod]
public void OrganisationPersistanceTest()
{
// Arrange
var apple = new Organisation { Name = "Apple" };
_db.Organisations.Add(apple);
// Act
_db.SaveChanges();
var organisationsCount = _dbResults.Organisations.Count();
var organisationsAppleCount = _dbResults.Organisations.Where(a => a.Id == apple.Id).Count();
var result = _dbResults.Organisations.FirstOrDefault(a => a.Id == apple.Id);
// Assert
Assert.IsTrue(organisationsCount == 1, string.Format("Organisations Count Mismatch - Actual={0}, Expected={1}", organisationsCount, 1));
Assert.IsTrue(organisationsAppleCount == 1, string.Format("Apple Organisations Count Mismatch - Actual={0}, Expected={1}", organisationsAppleCount, 1));
Assert.IsNotNull(result, "Organisations Result should not be null");
Assert.AreEqual(result.Name, apple.Name, "Name Mismatch");
}
//A Unit test
[TestMethod]
public void OrganisationWithNumberOfPeople_PersistanceTest()
{
// Arrange
var person = new Person { Firstname = "Bea" };
var anotherPerson = new Person { Firstname = "Tapiwa" };
var apple = new Organisation { Name = "Apple" };
apple.AddPerson(person);
apple.AddPerson(anotherPerson);
_db.Organisations.Add(apple);
// Act
_db.SaveChanges();
var organisationsCount = _dbResults.Organisations.Count();
var organisationsAppleCount = _dbResults.Organisations.Where(a => a.Id == apple.Id).Count();
var result = _dbResults.Organisations.FirstOrDefault(a => a.Id == apple.Id);
var peopleCountInOrganisation = result.People.Count();
// Assert
Assert.IsTrue(organisationsCount == 1, string.Format("Organisations Count Mismatch - Actual={0}, Expected={1}", organisationsCount, 1));
Assert.IsTrue(organisationsAppleCount == 1, string.Format("Apple Organisations Count Mismatch - Actual={0}, Expected={1}", organisationsAppleCount, 1));
Assert.IsNotNull(result, "Organisations Result should not be null");
Assert.AreEqual(result.People.Count, peopleCountInOrganisation, "People count mismatch in organisation Apple - Actual={0}, Expected={1}", peopleCountInOrganisation, 2);
Assert.AreEqual(result.Name, apple.Name, "Name Mismatch");
}
[TestClass]
公共类持久性测试
{
//创建存储库的两个实例,以便确保从数据库而不是内存中读取
私有myContext数据库;
私有myContext_dbResults;
专用只读设置\u配置设置;
公共持久性测试()
{
_configSettings=MockRepository.GenerateSub();
_configSettings.ConnectionString=“数据源=;初始目录=myContext\u测试;集成安全性=SSPI;池=false”;
SetInitializer(新的EmptyDataInitializer());
}
//这在最后一个测试完成执行后称为一次
[测试清理]
公共无效删除测试()
{
_db.Dispose();
_db=null;
_dbResults.Dispose();
_dbResults=null;
}
//每次运行测试之前都会调用此函数
[测试初始化]
公共测试()
{
_db=新的myContext(_configSettings);
_dbResults=新的myContext(_configSettings);
//这将强制数据库在此时使用初始化数据/空数据库进行初始化
var count=_db.Accounts.count();
var resultCount=_dbResults.Accounts.Count();
如果(count!=resultCount)抛出新的InvalidOperationException(“我们没有一致的数据库经验”);
}
[测试方法]
公共无效组织持久性测试()
{
//安排
var apple=新组织{Name=“apple”};
_db.organizations.Add(苹果);
//表演
_db.SaveChanges();
var organizationScont=_dbResults.organizations.Count();
var organizationsaplecount=_dbResults.organizations.Where(a=>a.Id==apple.Id).Count();
var result=\u dbResults.organizations.FirstOrDefault(a=>a.Id==apple.Id);
//断言
Assert.IsTrue(OrganizationScont==1,string.Format(“Organizations Count Mismatch-Actual={0},Expected={1}”,OrganizationScont,1));
Assert.IsTrue(organizationsapplecount==1,string.Format(“苹果组织计数不匹配-实际={0},预期={1}”,organizationsapplecount,1));
Assert.IsNotNull(结果,“结果不应为null”);
Assert.AreEqual(result.Name,apple.Name,“名称不匹配”);
}
//单元测试
[测试方法]
具有人数的公共无效组织\u持久性测试()
{
//安排
var person=newperson{Firstname=“Bea”};
var anotherPerson=新人{Firstname=“Tapiwa”};
var apple=新组织{Name=“apple”};
苹果。AddPerson(人);
apple.AddPerson(另一个人);
_db.organizations.Add(苹果);
//表演
_db.SaveChanges();
var organizationScont=_dbResults.organizations.Count();
var organizationsaplecount=_dbResults.organizations.Where(a=>a.Id==apple.Id).Count();
var result=\u dbResults.organizations.FirstOrDefault(a=>a.Id==apple.Id);
var peopleCountInOrganization=result.People.Count();
//断言
Assert.IsTrue(OrganizationScont==1,string.Format(“Organizations Count Mismatch-Actual={0},Expected={1}”,OrganizationScont,1));
Assert.IsTrue(organizationsapplecount==1,string.Format(“苹果组织计数不匹配-实际={0},预期={1}”,organizationsapplecount,1));
Assert.IsNotNull(结果,“结果不应为null”);
Assert.AreEqual(result.People.Count,PeopleCountInOrganization,“组织中的人员计数不匹配-实际={0},预期={1}”,PeopleCountInOrganization,2);
Assert.AreEqual(result.Name,apple.Name,“名称不匹配”);
}
}
在测试过程中,我可以看到SetupTest和TearDownTest方法被调用,但在测试之间,它似乎没有清理数据库 好的,更好的答案-添加一个数据库。初始化(force:true); 进入测试初始化方法
[TestInitialize]
public void SetupTest()
{
_db = new myContext(_configSettings);
_db.Database.Initialize(force: true);
_dbResults = new myContext(_configSettings);
// This forces the database to initialise at this point with the initialization data / Empty DB
var count = _db.Accounts.Count();
var resultCount = _dbResults.Accounts.Count();
if (count != resultCount) throw new InvalidOperationException("We do not have a consistant DB experiance.");
}
我使用助手来完成此类任务:
public abstract class TestingHelper
{
public static void ClearDatabase()
{
DatabaseContext myDbContext = new DatabaseContext();
myDbContext.Database.Delete();
myDbContext.Database.Create();
//FillDatabase(lawyers); //<- OPTIONAL if you want to add rows to any type tables
}
}
好的,答案似乎是修改TestCleanup方法,以便在每次测试[TestCleanup]public void TearDownTest(){if(_db.database.Exists()){{u db.database.Delete()之后显式删除并重新创建数据库db.Database.CreateIfNotExists();}db.Dispose();db=null;dbResults.Dispose();dbResults=null;}好的更好答案-添加一个数据库。初始化(强制:true);进入测试初始化方法。[TestInitialize]public void SetupTest(){_db=new myContext(_configSettings);_db.Database.Initialize(force:true);这适用于常规连接(非MDF),在调用
.Initia之后,是否有提示,说明当连接字符串包含AttachDBFilename
参数时,为什么相同的代码不起作用
[SetUp]
public void MyTests_SetUp()
{
TestingHelper.ClearDatabase();
}