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C# Unit Testing in C# Writing Unit Tests First Test

Posted by Daniel Taylor
Daniel Taylor
3,482 Points

Unit Test C# Task 1

Keeps coming back with an error. What's wrong?

[Fact] public void OnMapTest() { int width = 5; int height =5; 

        var mp = new Map(width,height)

        int x = 2;
        int y = 2;

        var pt = new Point(x,y);                    

        Assert.Equals(true, mp.OnMap(pt));
    }
Map.cs 
namespace TreehouseDefense
{
    public class Map
    {
        public readonly int Width;
        public readonly int Height;

        public Map(int width, int height)
        {
            if(width < 1 || height < 1)
            {
                throw new System.ArgumentOutOfRangeException(
                    "Map must be at least 1x1");
            }

            Width = width;
            Height = height;
        }

        public bool OnMap(Point point)
        {
            return point.X >= 0 && point.X < Width && 
                   point.Y >= 0 && point.Y < Height;
        }


    }
}
MapTests.cs 
using Xunit;

namespace TreehouseDefense.Tests
{
    public class MapTests
    {
        [Fact]
        public void OnMapTest()
        {
            int width = 5;
            int height =5; 

            var mp = new Map(width,height)

            int x = 2;
            int y = 2;

            var pt = new Point(x,y);                    

            Assert.Equals(true, mp.OnMap(pt));
        }
    }
}
Point.cs 
using System;

namespace TreehouseDefense
{
    public class Point
    {
        public readonly int X;
        public readonly int Y;

        public Point(int x, int y)
        {
            X = x;
            Y = y;
        }

        public double DistanceTo(Point point)
        {
            return Math.Sqrt(Math.Pow(X - point.X, 2.0) + Math.Pow(Y - point.Y, 2.0));
        }
    }
}

1 Answer

Steven Parker
Steven Parker
231,198 Points
Steven Parker
Steven Parker
231,198 Points

I see two issues:

  • you're missing the semicolon (";") at the end of the "var mp = ..." line.
  • you spelled "Equals" (with an "s") instead of "Equal".

But while you can pass the challenge by just fixing the errors, I believe the challenge intended for you to use the Assert.True that was provided initially (but replacing the false of course). Assert.True is a better test for something that returns a boolean than comparing it to true.