Book Image

Improving your C# Skills

By : Ovais Mehboob Ahmed Khan, John Callaway, Clayton Hunt, Rod Stephens
Book Image

Improving your C# Skills

By: Ovais Mehboob Ahmed Khan, John Callaway, Clayton Hunt, Rod Stephens

Overview of this book

This Learning Path shows you how to create high performing applications and solve programming challenges using a wide range of C# features. You’ll begin by learning how to identify the bottlenecks in writing programs, highlight common performance pitfalls, and apply strategies to detect and resolve these issues early. You'll also study the importance of micro-services architecture for building fast applications and implementing resiliency and security in .NET Core. Then, you'll study the importance of defining and testing boundaries, abstracting away third-party code, and working with different types of test double, such as spies, mocks, and fakes. In addition to describing programming trade-offs, this Learning Path will also help you build a useful toolkit of techniques, including value caching, statistical analysis, and geometric algorithms. This Learning Path includes content from the following Packt products: • C# 7 and .NET Core 2.0 High Performance by Ovais Mehboob Ahmed Khan • Practical Test-Driven Development using C# 7 by John Callaway, Clayton Hunt • The Modern C# Challenge by Rod Stephens
Table of Contents (26 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
8
What to Know Before Getting Started
17
Files and Directories
18
Advanced C# and .NET Features
Index

FizzBuzz


Moving on to the FizzBuzz example from Chapter 6Setting Up the .NET Test Environment, extend the classic behavior of this code kata and introduce some new behavior.

A new feature

A new requirement has been added to the classic FizzBuzz kata. The new requirement states that when a number is not divisible by 3 or 5 and is greater than 1, then the message Number not found should be returned. This should be easy enough. Start, once again, with the tests, and make the necessary modifications.

Number not found

To get started, a new test method is needed to verify that the Number not found message is returned:

[Fact]
public void GivenNonDivisibleGreaterThan1ThenNumberNotFound()
{
  // Arrange
  // Act
  var result = FizzBuzz(2);
  // Assert
  Assert.Equal("Number not found", result);
}

Now, make the test pass by modifying the existing code:

private object FizzBuzz(int value)
{
  if (value % 15 == 0)
    return "FizzBuzz";
  if (value % 5 == 0)
    return "Buzz";
  if (value % 3 == 0)
    return...