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💡 Why Use MockQueryable?

varquery=_userRepository.GetQueryable();awaitquery.AnyAsync(x=> ...);awaitquery.FirstOrDefaultAsync(x=> ...);awaitquery.ToListAsync();// etc.

🚀 Getting Started

1. Create Test Data

varusers=newList<UserEntity>{newUserEntity{LastName="Smith",DateOfBirth=newDateTime(2012,1,20)},// More test data...};

2. Build the Mock

varmock=users.BuildMock();// for IQueryable

3. Set Up in Your favorite Mocking Framework

Moq

_userRepository.Setup(x=>x.GetQueryable()).Returns(mock);

NSubstitute

_userRepository.GetQueryable().Returns(mock);

FakeItEasy

A.CallTo(()=>userRepository.GetQueryable()).Returns(mock);

🗃️ MockingDbSet<T>

varmockDbSet=users.BuildMockDbSet();// Moqvarrepo=newTestDbSetRepository(mockDbSet.Object);// NSubstitute / FakeItEasyvarrepo=newTestDbSetRepository(mockDbSet);

🔧 Adding Custom Logic

Example: CustomFindAsync

mock.Setup(x=>x.FindAsync(userId)).ReturnsAsync((object[]ids)=>{varid=(Guid)ids[0];returnusers.FirstOrDefault(x=>x.Id==id);});

Example: Custom Expression Visitor

varmockDbSet=users.BuildMockDbSet<UserEntity,SampleLikeExpressionVisitor>();

🧩 Extend for Other Frameworks

🔍 Sample Project