Welcome to Shouldly Documentation

// Step 1: Write failing test
[Test]
public void ValidateEmail_WithValidEmail_ReturnsTrue()
{
    // Arrange
    var validator = new EmailValidator();
    string email = "user@example.com";
    
    // Act
    bool isValid = validator.ValidateEmail(email);
    
    // Assert
    isValid.ShouldBeTrue();
}

// Step 2: Implement the simplest code to pass
public class EmailValidator
{
    public bool ValidateEmail(string email)
    {
        return email.Contains("@") && email.Contains(".");
    }
}

// Step 3: Add more tests for edge cases
[Test]
public void ValidateEmail_WithMissingAtSymbol_ReturnsFalse()
{
    // Arrange
    var validator = new EmailValidator();
    string email = "userexample.com";
    
    // Act
    bool isValid = validator.ValidateEmail(email);
    
    // Assert
    isValid.ShouldBeFalse();
}

[Test]
public async Task CreateUser_WithValidData_ShouldPersistToDatabase()
{
    // Arrange
    var repository = new UserRepository(_dbContext);
    var user = new User
    {
        Username = "johndoe",
        Email = "john@example.com",
        FirstName = "John",
        LastName = "Doe"
    };
    
    // Act
    await repository.CreateAsync(user);
    var savedUser = await repository.GetByIdAsync(user.Id);
    
    // Assert
    savedUser.ShouldNotBeNull();
    savedUser.Id.ShouldNotBe(0);
    savedUser.Username.ShouldBe("johndoe");
    savedUser.Email.ShouldBe("john@example.com");
    
    // Verify database was updated
    _dbContext.Users.Count().ShouldBe(1);
}