Mocking or faking DbEntityEntry or creating a new DbEntityEntry

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Following on the heels of my other question about mocking DbContext.Set I've got another question about mocking EF Code First.

I now have a method for my update that looks like:

if (entity == null)

    throw new ArgumentNullException("entity");



Context.GetIDbSet<T>().Attach(entity);

Context.Entry(entity).State = EntityState.Modified;

Context.CommitChanges();



return entity;

Context is an interface of my own DbContext.

The problem I'm running in to is, how do I handle the

Context.Entry(entity).State.

I've stepped through this code and it works when I have a real live DbContext as the implementation of my Context interface. But when I put my fake context there, I don't know how to handle it.

There is no constructor for a DbEntityEntry class, so I can't just create a new one in my fake context.

Has anyone had any success with either mocking or faking DbEntityEntry in your CodeFirst solutions?

Or is there a better way to handle the state changes?

edited May 23 '17 at 11:54

Community♦

asked Feb 17 '11 at 22:13

taylonr

9,23053063

add a comment |

Following on the heels of my other question about mocking DbContext.Set I've got another question about mocking EF Code First.

I now have a method for my update that looks like:

if (entity == null)

    throw new ArgumentNullException("entity");



Context.GetIDbSet<T>().Attach(entity);

Context.Entry(entity).State = EntityState.Modified;

Context.CommitChanges();



return entity;

Context is an interface of my own DbContext.

The problem I'm running in to is, how do I handle the

Context.Entry(entity).State.

I've stepped through this code and it works when I have a real live DbContext as the implementation of my Context interface. But when I put my fake context there, I don't know how to handle it.

There is no constructor for a DbEntityEntry class, so I can't just create a new one in my fake context.

Has anyone had any success with either mocking or faking DbEntityEntry in your CodeFirst solutions?

Or is there a better way to handle the state changes?

edited May 23 '17 at 11:54

Community♦

asked Feb 17 '11 at 22:13

taylonr

9,23053063

add a comment |

Following on the heels of my other question about mocking DbContext.Set I've got another question about mocking EF Code First.

I now have a method for my update that looks like:

if (entity == null)

    throw new ArgumentNullException("entity");



Context.GetIDbSet<T>().Attach(entity);

Context.Entry(entity).State = EntityState.Modified;

Context.CommitChanges();



return entity;

Context is an interface of my own DbContext.

The problem I'm running in to is, how do I handle the

Context.Entry(entity).State.

I've stepped through this code and it works when I have a real live DbContext as the implementation of my Context interface. But when I put my fake context there, I don't know how to handle it.

There is no constructor for a DbEntityEntry class, so I can't just create a new one in my fake context.

Has anyone had any success with either mocking or faking DbEntityEntry in your CodeFirst solutions?

Or is there a better way to handle the state changes?

edited May 23 '17 at 11:54

Community♦

asked Feb 17 '11 at 22:13

taylonr

9,23053063

Following on the heels of my other question about mocking DbContext.Set I've got another question about mocking EF Code First.

I now have a method for my update that looks like:

if (entity == null)

    throw new ArgumentNullException("entity");



Context.GetIDbSet<T>().Attach(entity);

Context.Entry(entity).State = EntityState.Modified;

Context.CommitChanges();



return entity;

Context is an interface of my own DbContext.

The problem I'm running in to is, how do I handle the

Context.Entry(entity).State.

I've stepped through this code and it works when I have a real live DbContext as the implementation of my Context interface. But when I put my fake context there, I don't know how to handle it.

There is no constructor for a DbEntityEntry class, so I can't just create a new one in my fake context.

Has anyone had any success with either mocking or faking DbEntityEntry in your CodeFirst solutions?

Or is there a better way to handle the state changes?

entity-framework ef-code-first

edited May 23 '17 at 11:54

Community♦

asked Feb 17 '11 at 22:13

taylonr

9,23053063

edited May 23 '17 at 11:54

Community♦

asked Feb 17 '11 at 22:13

taylonr

9,23053063

edited May 23 '17 at 11:54

Community♦

edited May 23 '17 at 11:54

Community♦

edited May 23 '17 at 11:54

Community♦

asked Feb 17 '11 at 22:13

taylonr

9,23053063

asked Feb 17 '11 at 22:13

taylonr

9,23053063

asked Feb 17 '11 at 22:13

taylonr

9,23053063

add a comment |

2 Answers
2

active

oldest

votes

Just like the other case, what you need is to add an additional level of indirection:

interface ISalesContext

{

    IDbSet<T> GetIDbSet<T>();

    void SetModified(object entity)

}



class SalesContext : DbContext, ISalesContext

{

    public IDbSet<T> GetIDbSet<T>()

    {

        return Set<T>();

    }



    public void SetModified(object entity)

    {

        Entry(entity).State = EntityState.Modified;

    }

}

So, instead of calling the implementation, you just call SetModified.

answered Feb 18 '11 at 0:19

Diego Mijelshon

48.9k11100139

Thanks... I got stuck thinking "How do I mock Entry" when I don't need to, I just need to mock the modified functionality... I'm almost embarrassed it's so obvious now.

– taylonr
Feb 18 '11 at 13:57

10

Don't be - our lives as developers are filled with "duh!" moments :-)

– Diego Mijelshon
Feb 18 '11 at 15:09

4

+9000 I just spent an hour researching how to mock classes with internal ctors and internal classes. I was getting thwarted at every turn and the solution is so simple! Thanks to both the asker and the answerer

– Darko Z
May 20 '11 at 5:03

@DiegoMijelshon This is elegant!

– devlord
Oct 16 '13 at 22:36

1

@ErwinRooijakkers late response, but in your tests, you don't do anything. Just implement the SetModified in your fake of ISalesContext and leave it empty. Just public void SetModified(object entity){}

– Nathan Koop
Jun 19 '15 at 14:32

|
show 2 more comments

Found this question when I needed to unit test with Moq, no need for your own interface. I wanted to set specific fields to not modified but the method SetModified can be used with object as well.

DbContext:

public class AppDbContext : DbContext

{   

    ...

    public virtual void SetModified(GuidEntityBase entity)

    {

        Entry(entity).State = EntityState.Modified;

        Entry(entity).Property(x => x.CreatedDate).IsModified = false;

        Entry(entity).Property(x => x.CreatedBy).IsModified = false;

    }

    ...

}

Test:

var mockContext = new Mock<AppDbContext>();

mockContext.Setup(c => c.MyDbSet).Returns(mockMyDbSet.Object);

mockContext.Setup(c => c.SetModified(It.IsAny<GuidEntityBase>()));

answered Jan 3 at 14:15

Ogglas

16.5k7102138

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

Just like the other case, what you need is to add an additional level of indirection:

interface ISalesContext

{

    IDbSet<T> GetIDbSet<T>();

    void SetModified(object entity)

}



class SalesContext : DbContext, ISalesContext

{

    public IDbSet<T> GetIDbSet<T>()

    {

        return Set<T>();

    }



    public void SetModified(object entity)

    {

        Entry(entity).State = EntityState.Modified;

    }

}

So, instead of calling the implementation, you just call SetModified.

answered Feb 18 '11 at 0:19

Diego Mijelshon

48.9k11100139

Thanks... I got stuck thinking "How do I mock Entry" when I don't need to, I just need to mock the modified functionality... I'm almost embarrassed it's so obvious now.

– taylonr
Feb 18 '11 at 13:57

10

Don't be - our lives as developers are filled with "duh!" moments :-)

– Diego Mijelshon
Feb 18 '11 at 15:09

4

+9000 I just spent an hour researching how to mock classes with internal ctors and internal classes. I was getting thwarted at every turn and the solution is so simple! Thanks to both the asker and the answerer

– Darko Z
May 20 '11 at 5:03

@DiegoMijelshon This is elegant!

– devlord
Oct 16 '13 at 22:36

1

@ErwinRooijakkers late response, but in your tests, you don't do anything. Just implement the SetModified in your fake of ISalesContext and leave it empty. Just public void SetModified(object entity){}

– Nathan Koop
Jun 19 '15 at 14:32

|
show 2 more comments

Just like the other case, what you need is to add an additional level of indirection:

interface ISalesContext

{

    IDbSet<T> GetIDbSet<T>();

    void SetModified(object entity)

}



class SalesContext : DbContext, ISalesContext

{

    public IDbSet<T> GetIDbSet<T>()

    {

        return Set<T>();

    }



    public void SetModified(object entity)

    {

        Entry(entity).State = EntityState.Modified;

    }

}

So, instead of calling the implementation, you just call SetModified.

answered Feb 18 '11 at 0:19

Diego Mijelshon

48.9k11100139

Thanks... I got stuck thinking "How do I mock Entry" when I don't need to, I just need to mock the modified functionality... I'm almost embarrassed it's so obvious now.

– taylonr
Feb 18 '11 at 13:57

10

Don't be - our lives as developers are filled with "duh!" moments :-)

– Diego Mijelshon
Feb 18 '11 at 15:09

4

+9000 I just spent an hour researching how to mock classes with internal ctors and internal classes. I was getting thwarted at every turn and the solution is so simple! Thanks to both the asker and the answerer

– Darko Z
May 20 '11 at 5:03

@DiegoMijelshon This is elegant!

– devlord
Oct 16 '13 at 22:36

1

@ErwinRooijakkers late response, but in your tests, you don't do anything. Just implement the SetModified in your fake of ISalesContext and leave it empty. Just public void SetModified(object entity){}

– Nathan Koop
Jun 19 '15 at 14:32

|
show 2 more comments

Just like the other case, what you need is to add an additional level of indirection:

interface ISalesContext

{

    IDbSet<T> GetIDbSet<T>();

    void SetModified(object entity)

}



class SalesContext : DbContext, ISalesContext

{

    public IDbSet<T> GetIDbSet<T>()

    {

        return Set<T>();

    }



    public void SetModified(object entity)

    {

        Entry(entity).State = EntityState.Modified;

    }

}

So, instead of calling the implementation, you just call SetModified.

answered Feb 18 '11 at 0:19

Diego Mijelshon

48.9k11100139

Just like the other case, what you need is to add an additional level of indirection:

interface ISalesContext

{

    IDbSet<T> GetIDbSet<T>();

    void SetModified(object entity)

}



class SalesContext : DbContext, ISalesContext

{

    public IDbSet<T> GetIDbSet<T>()

    {

        return Set<T>();

    }



    public void SetModified(object entity)

    {

        Entry(entity).State = EntityState.Modified;

    }

}

So, instead of calling the implementation, you just call SetModified.

answered Feb 18 '11 at 0:19

Diego Mijelshon

48.9k11100139

answered Feb 18 '11 at 0:19

Diego Mijelshon

48.9k11100139

answered Feb 18 '11 at 0:19

Diego Mijelshon

48.9k11100139

answered Feb 18 '11 at 0:19

Diego Mijelshon

48.9k11100139

Thanks... I got stuck thinking "How do I mock Entry" when I don't need to, I just need to mock the modified functionality... I'm almost embarrassed it's so obvious now.

– taylonr
Feb 18 '11 at 13:57

10

Don't be - our lives as developers are filled with "duh!" moments :-)

– Diego Mijelshon
Feb 18 '11 at 15:09

4

+9000 I just spent an hour researching how to mock classes with internal ctors and internal classes. I was getting thwarted at every turn and the solution is so simple! Thanks to both the asker and the answerer

– Darko Z
May 20 '11 at 5:03

@DiegoMijelshon This is elegant!

– devlord
Oct 16 '13 at 22:36

1

@ErwinRooijakkers late response, but in your tests, you don't do anything. Just implement the SetModified in your fake of ISalesContext and leave it empty. Just public void SetModified(object entity){}

– Nathan Koop
Jun 19 '15 at 14:32

|
show 2 more comments

Thanks... I got stuck thinking "How do I mock Entry" when I don't need to, I just need to mock the modified functionality... I'm almost embarrassed it's so obvious now.

– taylonr
Feb 18 '11 at 13:57

10

Don't be - our lives as developers are filled with "duh!" moments :-)

– Diego Mijelshon
Feb 18 '11 at 15:09

4

+9000 I just spent an hour researching how to mock classes with internal ctors and internal classes. I was getting thwarted at every turn and the solution is so simple! Thanks to both the asker and the answerer

– Darko Z
May 20 '11 at 5:03

@DiegoMijelshon This is elegant!

– devlord
Oct 16 '13 at 22:36

1

@ErwinRooijakkers late response, but in your tests, you don't do anything. Just implement the SetModified in your fake of ISalesContext and leave it empty. Just public void SetModified(object entity){}

– Nathan Koop
Jun 19 '15 at 14:32

Thanks... I got stuck thinking "How do I mock Entry" when I don't need to, I just need to mock the modified functionality... I'm almost embarrassed it's so obvious now.

– taylonr
Feb 18 '11 at 13:57

Don't be - our lives as developers are filled with "duh!" moments :-)

– Diego Mijelshon
Feb 18 '11 at 15:09

+9000 I just spent an hour researching how to mock classes with internal ctors and internal classes. I was getting thwarted at every turn and the solution is so simple! Thanks to both the asker and the answerer

– Darko Z
May 20 '11 at 5:03

@DiegoMijelshon This is elegant!

– devlord
Oct 16 '13 at 22:36

@ErwinRooijakkers late response, but in your tests, you don't do anything. Just implement the SetModified in your fake of ISalesContext and leave it empty. Just public void SetModified(object entity){}

– Nathan Koop
Jun 19 '15 at 14:32

|
show 2 more comments

DbContext:

public class AppDbContext : DbContext

{   

    ...

    public virtual void SetModified(GuidEntityBase entity)

    {

        Entry(entity).State = EntityState.Modified;

        Entry(entity).Property(x => x.CreatedDate).IsModified = false;

        Entry(entity).Property(x => x.CreatedBy).IsModified = false;

    }

    ...

}

Test:

var mockContext = new Mock<AppDbContext>();

mockContext.Setup(c => c.MyDbSet).Returns(mockMyDbSet.Object);

mockContext.Setup(c => c.SetModified(It.IsAny<GuidEntityBase>()));

answered Jan 3 at 14:15

Ogglas

16.5k7102138

add a comment |

DbContext:

public class AppDbContext : DbContext

{   

    ...

    public virtual void SetModified(GuidEntityBase entity)

    {

        Entry(entity).State = EntityState.Modified;

        Entry(entity).Property(x => x.CreatedDate).IsModified = false;

        Entry(entity).Property(x => x.CreatedBy).IsModified = false;

    }

    ...

}

Test:

var mockContext = new Mock<AppDbContext>();

mockContext.Setup(c => c.MyDbSet).Returns(mockMyDbSet.Object);

mockContext.Setup(c => c.SetModified(It.IsAny<GuidEntityBase>()));

answered Jan 3 at 14:15

Ogglas

16.5k7102138

add a comment |

DbContext:

public class AppDbContext : DbContext

{   

    ...

    public virtual void SetModified(GuidEntityBase entity)

    {

        Entry(entity).State = EntityState.Modified;

        Entry(entity).Property(x => x.CreatedDate).IsModified = false;

        Entry(entity).Property(x => x.CreatedBy).IsModified = false;

    }

    ...

}

Test:

var mockContext = new Mock<AppDbContext>();

mockContext.Setup(c => c.MyDbSet).Returns(mockMyDbSet.Object);

mockContext.Setup(c => c.SetModified(It.IsAny<GuidEntityBase>()));

answered Jan 3 at 14:15

Ogglas

16.5k7102138

DbContext:

public class AppDbContext : DbContext

{   

    ...

    public virtual void SetModified(GuidEntityBase entity)

    {

        Entry(entity).State = EntityState.Modified;

        Entry(entity).Property(x => x.CreatedDate).IsModified = false;

        Entry(entity).Property(x => x.CreatedBy).IsModified = false;

    }

    ...

}

Test:

var mockContext = new Mock<AppDbContext>();

mockContext.Setup(c => c.MyDbSet).Returns(mockMyDbSet.Object);

mockContext.Setup(c => c.SetModified(It.IsAny<GuidEntityBase>()));

answered Jan 3 at 14:15

Ogglas

16.5k7102138

answered Jan 3 at 14:15

Ogglas

16.5k7102138

answered Jan 3 at 14:15

Ogglas

16.5k7102138

answered Jan 3 at 14:15

Ogglas

16.5k7102138

add a comment |

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