https://github.com/neurospeech/ef-core-localdb-mock

Entity Framework Mocking using SQL Server LocalDB
https://github.com/neurospeech/ef-core-localdb-mock

Last synced: about 2 months ago
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Entity Framework Mocking using SQL Server LocalDB

• Host: GitHub
• URL: https://github.com/neurospeech/ef-core-localdb-mock
• Owner: neurospeech
• License: gpl-3.0
• Created: 2017-11-10T11:30:16.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2019-02-01T10:22:40.000Z (almost 6 years ago)
• Last Synced: 2024-10-07T00:35:12.873Z (3 months ago)
• Language: C#
• Size: 24.4 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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# ef-core-localdb-mock

Entity Framework Mocking using SQL Server LocalDB

```c#

    // Assuming you have `AppDbContext` as your EF DbContext in side your actual application project

    // For test purposes, you will have to use AppDbTestContext 

    // or you can use AppDbTestContext as dependency in your DI container

    public class AppDbTestContext : ShopContext

    {

        // this is important

        // since databases are dynamically created and destroyed

        // MockDatabaseContext.Current.ConnectionString contains 

        // correct database for current test context

        // MockDatabaseContext.Current will work correctly with async await

        // without worrying about passing context

        public AppDbTestContext(DbContextOptions options): base(options)

        {

        }

        public AppDbTestContext(): base(Create(MockDatabaseContext.Current.ConnectionString))

        {

        }

        public AppDbTestContext(string cnstr) : base(Create(cnstr)) {

        }

        public static DbContextOptions Create(string connectionString) {

            DbContextOptionsBuilder builder = new DbContextOptionsBuilder();

            builder.UseSqlServer(connectionString);

            return builder.Options;

        }

    }

    public abstract class BaseTest : 

        MockSqlDatabaseContext

    {

        public BaseTest(ITestOutputHelper writer)

        {

            this.Writer = writer;

        }

        protected override void DumpLogs()

        {

            this.Writer.WriteLine(base.GeneratedLog);

        }

        public ITestOutputHelper Writer { get; private set; }

        public AppDbTestContext CreateContext()

        {

            AppDbTestContext db = new AppDbTestContext(ConnectionString);

            db.Database.EnsureCreated();

            Seed(db);

            return db;

        }

        public void Seed(AppDbTestContext db) {

            db.Products.Add(new Product {

                Name = "a"

            });

            db.SaveChanges();

            DoNotDelete = true;

        }

    }

```

Test Case

```c#

    public class DbTest : BaseTest {

    

        [Fact]

        public void Test1() {

        

            using(var db = CreateContext()) {

                 // do test here...

            }

            

            // after this test is finished, database will be deleted automatically

            // if you want to prevent deletion of database to investigate anything

            // uncomment following

            

            // DoNotDelete = true;

          

        }

    

    }

```