Multiple Unit Tests' Running With multiple Connections To Database











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In the Asp.Net core project, there are several unit tests used services for connecting to the database and bring real data, so multiple concurrent connections are created. When these tests run, I received 'A second operation started on this context before a previous operation completed. Any instance members are not guaranteed to be thread safe.' error, but I do not know how can I fix this error without using async ways.






asp.net testing model-view-controller core xunit







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  • Are you sure you have a bug in your test setup and not a bug in the system under test?
    – John Wu
    yesterday










  • Yes, I am sure because I used this way for another project.
    – Niloufar Mohammadi
    yesterday















up vote
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In the Asp.Net core project, there are several unit tests used services for connecting to the database and bring real data, so multiple concurrent connections are created. When these tests run, I received 'A second operation started on this context before a previous operation completed. Any instance members are not guaranteed to be thread safe.' error, but I do not know how can I fix this error without using async ways.






asp.net testing model-view-controller core xunit







share|improve this question







New contributor




Niloufar Mohammadi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




















  • Are you sure you have a bug in your test setup and not a bug in the system under test?
    – John Wu
    yesterday










  • Yes, I am sure because I used this way for another project.
    – Niloufar Mohammadi
    yesterday













up vote
1
down vote

favorite









up vote
1
down vote

favorite











In the Asp.Net core project, there are several unit tests used services for connecting to the database and bring real data, so multiple concurrent connections are created. When these tests run, I received 'A second operation started on this context before a previous operation completed. Any instance members are not guaranteed to be thread safe.' error, but I do not know how can I fix this error without using async ways.






asp.net testing model-view-controller core xunit







share|improve this question







New contributor




Niloufar Mohammadi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











In the Asp.Net core project, there are several unit tests used services for connecting to the database and bring real data, so multiple concurrent connections are created. When these tests run, I received 'A second operation started on this context before a previous operation completed. Any instance members are not guaranteed to be thread safe.' error, but I do not know how can I fix this error without using async ways.






asp.net testing model-view-controller core xunit




asp.net testing model-view-controller core xunit






share|improve this question







New contributor




Niloufar Mohammadi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question







New contributor




Niloufar Mohammadi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question






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Niloufar Mohammadi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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New contributor




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New contributor





Niloufar Mohammadi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Niloufar Mohammadi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












  • Are you sure you have a bug in your test setup and not a bug in the system under test?
    – John Wu
    yesterday










  • Yes, I am sure because I used this way for another project.
    – Niloufar Mohammadi
    yesterday


















  • Are you sure you have a bug in your test setup and not a bug in the system under test?
    – John Wu
    yesterday










  • Yes, I am sure because I used this way for another project.
    – Niloufar Mohammadi
    yesterday
















Are you sure you have a bug in your test setup and not a bug in the system under test?
– John Wu
yesterday




Are you sure you have a bug in your test setup and not a bug in the system under test?
– John Wu
yesterday












Yes, I am sure because I used this way for another project.
– Niloufar Mohammadi
yesterday




Yes, I am sure because I used this way for another project.
– Niloufar Mohammadi
yesterday












1 Answer
1






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up vote
1
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In unit tests you should not use connection to a DB. You should use mockups and create your own data to test with.



Use the NuGet package moqto easily create mockup objects.



Example of using the mockup objects:



public void Test_Login()

    {

        Mock<IDatabase> mockDatabase = new Mock<IDatabase>();

        mockDatabase.Setup(p => p.GetAccountAsync(It.IsAny<string>()))

            .Returns((string givenEmail) => Task.FromResult(new Account(1, "test", givenEmail, "123", "$2b$10$pfsnDQ3IWuY/zER/uBQpedvRFntMNHGOGhOSpABKZ7bwS", false)));



        Mock<IConfiguration> mockConfiguration = new Mock<IConfiguration>();

        Mock<IHostingEnvironment> mockHostingEnvironment = new Mock<IHostingEnvironment>();



        AccountService accountService = new AccountService(mockDatabase.Object, mockConfiguration.Object, mockHostingEnvironment.Object);



        LoginViewModel loginViewModel = new LoginViewModel

        {

            EmailLogin = "test@test.com",

            PasswordLogin = "s"

        };



        Task<Account> account = accountService.LoginAsync(loginViewModel);



        Assert.NotNull(account.Result);

        Assert.Equal(loginViewModel.EmailLogin, account.Result.Email);

    }


In the example above I manually set the value of the mockup database that the service method will use to retrieve the account and compare the returned email with the given email.






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  • Actually, I used mockups and now I want to test services connecting to the database. If you know how can I do it with multiple connections, please help me. Thank you!
    – Niloufar Mohammadi
    yesterday











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up vote
1
down vote













In unit tests you should not use connection to a DB. You should use mockups and create your own data to test with.



Use the NuGet package moqto easily create mockup objects.



Example of using the mockup objects:



public void Test_Login()

    {

        Mock<IDatabase> mockDatabase = new Mock<IDatabase>();

        mockDatabase.Setup(p => p.GetAccountAsync(It.IsAny<string>()))

            .Returns((string givenEmail) => Task.FromResult(new Account(1, "test", givenEmail, "123", "$2b$10$pfsnDQ3IWuY/zER/uBQpedvRFntMNHGOGhOSpABKZ7bwS", false)));



        Mock<IConfiguration> mockConfiguration = new Mock<IConfiguration>();

        Mock<IHostingEnvironment> mockHostingEnvironment = new Mock<IHostingEnvironment>();



        AccountService accountService = new AccountService(mockDatabase.Object, mockConfiguration.Object, mockHostingEnvironment.Object);



        LoginViewModel loginViewModel = new LoginViewModel

        {

            EmailLogin = "test@test.com",

            PasswordLogin = "s"

        };



        Task<Account> account = accountService.LoginAsync(loginViewModel);



        Assert.NotNull(account.Result);

        Assert.Equal(loginViewModel.EmailLogin, account.Result.Email);

    }


In the example above I manually set the value of the mockup database that the service method will use to retrieve the account and compare the returned email with the given email.






share|improve this answer























  • Actually, I used mockups and now I want to test services connecting to the database. If you know how can I do it with multiple connections, please help me. Thank you!
    – Niloufar Mohammadi
    yesterday















up vote
1
down vote













In unit tests you should not use connection to a DB. You should use mockups and create your own data to test with.



Use the NuGet package moqto easily create mockup objects.



Example of using the mockup objects:



public void Test_Login()

    {

        Mock<IDatabase> mockDatabase = new Mock<IDatabase>();

        mockDatabase.Setup(p => p.GetAccountAsync(It.IsAny<string>()))

            .Returns((string givenEmail) => Task.FromResult(new Account(1, "test", givenEmail, "123", "$2b$10$pfsnDQ3IWuY/zER/uBQpedvRFntMNHGOGhOSpABKZ7bwS", false)));



        Mock<IConfiguration> mockConfiguration = new Mock<IConfiguration>();

        Mock<IHostingEnvironment> mockHostingEnvironment = new Mock<IHostingEnvironment>();



        AccountService accountService = new AccountService(mockDatabase.Object, mockConfiguration.Object, mockHostingEnvironment.Object);



        LoginViewModel loginViewModel = new LoginViewModel

        {

            EmailLogin = "test@test.com",

            PasswordLogin = "s"

        };



        Task<Account> account = accountService.LoginAsync(loginViewModel);



        Assert.NotNull(account.Result);

        Assert.Equal(loginViewModel.EmailLogin, account.Result.Email);

    }


In the example above I manually set the value of the mockup database that the service method will use to retrieve the account and compare the returned email with the given email.






share|improve this answer























  • Actually, I used mockups and now I want to test services connecting to the database. If you know how can I do it with multiple connections, please help me. Thank you!
    – Niloufar Mohammadi
    yesterday













up vote
1
down vote










up vote
1
down vote









In unit tests you should not use connection to a DB. You should use mockups and create your own data to test with.



Use the NuGet package moqto easily create mockup objects.



Example of using the mockup objects:



public void Test_Login()

    {

        Mock<IDatabase> mockDatabase = new Mock<IDatabase>();

        mockDatabase.Setup(p => p.GetAccountAsync(It.IsAny<string>()))

            .Returns((string givenEmail) => Task.FromResult(new Account(1, "test", givenEmail, "123", "$2b$10$pfsnDQ3IWuY/zER/uBQpedvRFntMNHGOGhOSpABKZ7bwS", false)));



        Mock<IConfiguration> mockConfiguration = new Mock<IConfiguration>();

        Mock<IHostingEnvironment> mockHostingEnvironment = new Mock<IHostingEnvironment>();



        AccountService accountService = new AccountService(mockDatabase.Object, mockConfiguration.Object, mockHostingEnvironment.Object);



        LoginViewModel loginViewModel = new LoginViewModel

        {

            EmailLogin = "test@test.com",

            PasswordLogin = "s"

        };



        Task<Account> account = accountService.LoginAsync(loginViewModel);



        Assert.NotNull(account.Result);

        Assert.Equal(loginViewModel.EmailLogin, account.Result.Email);

    }


In the example above I manually set the value of the mockup database that the service method will use to retrieve the account and compare the returned email with the given email.






share|improve this answer














In unit tests you should not use connection to a DB. You should use mockups and create your own data to test with.



Use the NuGet package moqto easily create mockup objects.



Example of using the mockup objects:



public void Test_Login()

    {

        Mock<IDatabase> mockDatabase = new Mock<IDatabase>();

        mockDatabase.Setup(p => p.GetAccountAsync(It.IsAny<string>()))

            .Returns((string givenEmail) => Task.FromResult(new Account(1, "test", givenEmail, "123", "$2b$10$pfsnDQ3IWuY/zER/uBQpedvRFntMNHGOGhOSpABKZ7bwS", false)));



        Mock<IConfiguration> mockConfiguration = new Mock<IConfiguration>();

        Mock<IHostingEnvironment> mockHostingEnvironment = new Mock<IHostingEnvironment>();



        AccountService accountService = new AccountService(mockDatabase.Object, mockConfiguration.Object, mockHostingEnvironment.Object);



        LoginViewModel loginViewModel = new LoginViewModel

        {

            EmailLogin = "test@test.com",

            PasswordLogin = "s"

        };



        Task<Account> account = accountService.LoginAsync(loginViewModel);



        Assert.NotNull(account.Result);

        Assert.Equal(loginViewModel.EmailLogin, account.Result.Email);

    }


In the example above I manually set the value of the mockup database that the service method will use to retrieve the account and compare the returned email with the given email.







share|improve this answer














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edited yesterday

























answered yesterday









Svenmarim

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  • Actually, I used mockups and now I want to test services connecting to the database. If you know how can I do it with multiple connections, please help me. Thank you!
    – Niloufar Mohammadi
    yesterday


















  • Actually, I used mockups and now I want to test services connecting to the database. If you know how can I do it with multiple connections, please help me. Thank you!
    – Niloufar Mohammadi
    yesterday
















Actually, I used mockups and now I want to test services connecting to the database. If you know how can I do it with multiple connections, please help me. Thank you!
– Niloufar Mohammadi
yesterday




Actually, I used mockups and now I want to test services connecting to the database. If you know how can I do it with multiple connections, please help me. Thank you!
– Niloufar Mohammadi
yesterday










Niloufar Mohammadi is a new contributor. Be nice, and check out our Code of Conduct.










 

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