Applied Programming/Testing/C Sharp
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Test.csproj
[edit | edit source]<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
<RootNamespace>Temperature</RootNamespace>
<GenerateProgramFile>false</GenerateProgramFile>
<IsPackable>false</IsPackable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
<PackageReference Include="xunit" Version="2.4.1" />
<PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
<PackageReference Include="coverlet.collector" Version="1.3.0">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
</ItemGroup>
</Project>
Temperature.cs
[edit | edit source]/// <summary>
/// This program asks the user for a Fahrenheit temperature,
/// converts the given temperature to Celsius,
/// and displays the results.
///
/// Input:
/// Fahrenheit temperature
///
/// Output:
/// Fahrenheit temperature
/// Celsius temperature
///
/// Example:
/// Enter Fahrenheit temperature:
/// 100
/// 100.0° Fahrenheit is 37.8° Celsius
///
/// References:
/// https://www.mathsisfun.com/temperature-conversion.html
/// https://en.wikibooks.org/wiki/C_Sharp_Programming
/// https://en.wikiversity.org/wiki/Applied_Programming/Functions/Python3
/// https://en.wikiversity.org/wiki/Programming_Fundamentals/Functions/C_Sharp
/// https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/inside-a-program/coding-conventions
/// https://www.dofactory.com/reference/csharp-coding-standards
/// </summary>
using System;
namespace Temperature
{
class Temperature
{
const int TemperatureDifference = 32;
const double TemperatureRatio = 5.0 / 9.0;
const double AbsoluteZero = -459.67;
/// <summary>Runs the main program logic.</summary>
public static void Main(string[] args)
{
while(true)
{
Console.Clear();
var fahrenheit = GetFahrenheit();
var celsius = ConvertFahrenheitToCelsius(fahrenheit);
DisplayResult(fahrenheit, celsius);
Console.WriteLine("Would you like to convert another temperature? Y or N");
var input = Console.ReadLine();
if (input != "Y")
{
break;
}
}
}
/// <summary>Gets Fahrenheit temperature.</summary>
/// <returns>Returns Fahrenheit temperature.</returns>
/// <exception cref="System.ArgumentOutOfRangeException">
/// Thrown when entered temperature is below absolute zero.
/// </exception>
/// <exception cref="System.FormatException">
/// Thrown when entered temperature is not a valid floating point value.
/// </exception>
public static double GetFahrenheit()
{
while(true)
{
Console.WriteLine("Enter Fahrenheit temperature: ");
var input = Console.ReadLine();
try
{
var fahrenheit = Convert.ToDouble(input);
if (fahrenheit < AbsoluteZero)
{
Console.WriteLine("Fahrenheit temperature cannot be below absolute zero.");
Console.WriteLine($"ArgumentOutOfRangeException: '{fahrenheit}' is invalid.");
}
else
{
return fahrenheit;
}
}
catch (System.FormatException)
{
Console.WriteLine("Fahrenheit temperature must be a floating point value.");
Console.WriteLine($"FormatException: '{input}' is invalid.");
}
}
}
/// <summary>Calculates Celsius temperature.</summary>
/// <param name="fahrenheit">Fahrenheit temperature.</param>
/// <returns>Returns Celsius temperature.</returns>
public static double ConvertFahrenheitToCelsius(double fahrenheit)
{
System.Diagnostics.Debug.Assert(fahrenheit >= AbsoluteZero);
var celsius = (fahrenheit - TemperatureDifference) * TemperatureRatio;
return celsius;
}
/// <summary>Displays conversion results.</summary>
/// <param name="fahrenheit">Fahrenheit temperature.</param>
/// <param name="fahrenheit">Celsius temperature.</param>
public static void DisplayResult(double fahrenheit, double celsius)
{
Console.WriteLine(fahrenheit.ToString() + "° Fahrenheit is " + celsius + "° Celsius");
}
}
}
TemperatureTest.cs
[edit | edit source]// Temperature test code.
//
// Created using:
// dotnet new xunit
//
// Test using:
// dotnet test
//
// References:
// https://docs.microsoft.com/en-us/dotnet/core/testing/unit-testing-with-dotnet-test
// https://docs.microsoft.com/en-us/dotnet/core/testing/unit-testing-best-practices
// https://andrewlock.net/fixing-the-error-program-has-more-than-one-entry-point-defined-for-
using System;
using Xunit;
namespace Temperature
{
public class TemperatureTests
{
[Fact]
public void GetFahrenheit_Returns_Fahrenheit()
{
var input = new System.IO.StringReader("98.6");
Console.SetIn(input);
var output = new System.IO.StringWriter();
Console.SetOut(output);
var fahrenheit = Temperature.GetFahrenheit();
Assert.Equal(98.6, fahrenheit);
}
[Fact]
public void GetFahrenheit_BelowAbsoluteZero_DisplaysError()
{
var input = new System.IO.StringReader("-500\n0");
Console.SetIn(input);
var output = new System.IO.StringWriter();
Console.SetOut(output);
var fahrenheit = Temperature.GetFahrenheit();
Assert.Contains("absolute zero", output.ToString());
Assert.Contains("'-500' is invalid", output.ToString());
Assert.Equal(0, fahrenheit);
}
[Fact]
public void GetFahrenheit_String_DisplaysError()
{
var input = new System.IO.StringReader("x\n0");
Console.SetIn(input);
var output = new System.IO.StringWriter();
Console.SetOut(output);
var fahrenheit = Temperature.GetFahrenheit();
Assert.Contains("floating point", output.ToString());
Assert.Contains("'x' is invalid", output.ToString());
Assert.Equal(0, fahrenheit);
}
[Fact]
public void ConvertFahrenheitToCelsius_Converts_ToCelsius()
{
var input = new System.IO.StringReader("98.6");
Console.SetIn(input);
var output = new System.IO.StringWriter();
Console.SetOut(output);
var celsius = Temperature.ConvertFahrenheitToCelsius(98.6);
Assert.Equal(37, celsius);
}
[Fact]
public void DisplayResult_Displays_Result()
{
var output = new System.IO.StringWriter();
Console.SetOut(output);
Temperature.DisplayResult(98.6, 37.0);
Assert.Contains("98.6° Fahrenheit is 37° Celsius", output.ToString());
}
}
}
Try It
[edit | edit source]- Install the Microsoft .NET 5.0 SDK.
- Copy the the three files above and paste into a new local folder.
- Open a terminal window or command prompt in the local folder.
- Run the following command:
dotnet test