Using NUnit testing with C# Collection Class Library project - testing

Question

/Using NUnit testing with C# Collection Class Library project
I am not able to figure out the TestFixture in this code
any help will be a great help
I have a below Test Class/
using System.Collections.Generic;
using System.Linq;
using NUnit.Framework;
using ScoringExercise;
using ScoringExercise.Entities;
namespace ScoringExerciseTests
{
[TestFixture]
public class ScoringTests
{
readonly List<MultiChoiceItem> _assessmentItems;
public ScoringTests()
{
// Assessment items
_assessmentItems = new List<MultiChoiceItem>
{
new MultiChoiceItem()
{
ItemText = "Which city is the capital of Sweden?",
Options = new string[] {"Helsinki", "Stockholm", "Malmö", "Oslo"},
CorrectAnswerIndex = 1,
MarksAwardedIfCorrect = 1
},
new MultiChoiceItem()
{
ItemText = "Which of these cheeses normally has large round holes?",
Options = new string[] {"Emmental", "Feta", "Danish Blue", "Gruyere"},
CorrectAnswerIndex = 0,
MarksAwardedIfCorrect = 1
},
new MultiChoiceItem()
{
ItemText = "Which of the following is not a root vegetable?",
Options = new string[] {"Carrot", "Parsnip", "Turnip", "Shallot"},
CorrectAnswerIndex = 3,
MarksAwardedIfCorrect = 4
},
new MultiChoiceItem()
{
ItemText = "What colour is the outmost archery target ring?",
Options = new string[] {"White", "Yellow", "Red", "Black"},
CorrectAnswerIndex = 0,
MarksAwardedIfCorrect = 1
},
new MultiChoiceItem()
{
ItemText = "What is the chemical symbol for silver?",
Options = new string[] {"Au", "Sr", "Si", "Ag"},
CorrectAnswerIndex = 3,
MarksAwardedIfCorrect = 2
}
};
}
[Test]
public void AllCorrect()
{
// create test data where all items have corresponding responses
// and all responses are correct
Dictionary<int, int> responses = new Dictionary<int, int>();
int i = 0;
foreach (MultiChoiceItem item in _assessmentItems)
{
responses.Add(i, item.CorrectAnswerIndex);
i++;
}
// check that actual results are in line with expected results
AssessmentResults expected = new AssessmentResults()
{
ItemsAttempted = _assessmentItems.Count,
ItemsCorrect = _assessmentItems.Count,
TotalMarksAwarded = _assessmentItems.Sum(item => item.MarksAwardedIfCorrect)
};
AssessmentResults actual = ScoringEngine.GetResults(_assessmentItems, responses);
AssertValueEquality(expected, actual);
}
[Test]
public void AllWrong()
{
// create test data where all items have corresponding responses
// and all responses are wrong
Dictionary<int, int> responses = new Dictionary<int, int>();
int i = 0;
foreach (MultiChoiceItem item in _assessmentItems)
{
if ((item.CorrectAnswerIndex + 1) < item.Options.Length)
responses.Add(i, item.CorrectAnswerIndex + 1);
else
responses.Add(i, item.CorrectAnswerIndex - 1);
i++;
}
// check that actual results are in line with expected results
AssessmentResults expected = new AssessmentResults()
{
ItemsAttempted = responses.Count,
ItemsCorrect = 0,
TotalMarksAwarded = 0
};
AssessmentResults actual = ScoringEngine.GetResults(_assessmentItems, responses);
AssertValueEquality(expected, actual);
}
private void AssertValueEquality(AssessmentResults expected, AssessmentResults actual)
{
CollectionAssert.AreEqual(
new int[] { expected.ItemsAttempted, expected.ItemsCorrect,
expected.TotalMarksAwarded },
new int[] { actual.ItemsAttempted, actual.ItemsCorrect,
actual.TotalMarksAwarded }
);
}
}
}
/How can I implement GetResults method in my Class Library project which is as below
I am not able to figure out the TestFixture in this code
any help will be a great help/
using System.Collections.Generic;
using ScoringExercise.Entities;
using System.Linq;
using System.Collections;
namespace ScoringExercise
{
public static class ScoringEngine
{
/// <summary>
/// Calculates the results of an assessment based upon the test content and candidate
/// responses.
/// </summary>
public static AssessmentResults GetResults(List<MultiChoiceItem> multiChoiceItems,
Dictionary<int, int> responses)
{
//return null;
}
}
}
namespace ScoringExercise.Entities
{
/// <summary>
/// Represents a single multi-choice item in an assessment
/// </summary>
public class MultiChoiceItem
{
// the text associated with the item aka the question
public string ItemText { get; set; }
// the option strings from which the candidate chooses a response
public string[] Options { get; set; }
// the index of the correct answer from within the Options array
public int CorrectAnswerIndex { get; set; }
// the number of marks awarded if the correct response is chosen
public int MarksAwardedIfCorrect { get; set; }
}
}
namespace ScoringExercise.Entities
{
/// <summary>
/// Represents the results of a single assessment instance
/// </summary>
public class AssessmentResults
{
public int ItemsAttempted { get; set; }
public int ItemsCorrect { get; set; }
public int TotalMarksAwarded { get; set; }
}
}

Answer 1

public static AssessmentResults GetResults(List<MultiChoiceItem> multiChoiceItems, Dictionary<int, int> responses)
{
int i = 0;
int ItemsCorrect = 0;
int TotalMarksAwarded = 0;
foreach (var item in multiChoiceItems.Where(c => responses.ContainsKey(c.CorrectAnswerIndex)))
{
if (item.CorrectAnswerIndex == responses[i])
{
ItemsCorrect++;
TotalMarksAwarded += item.MarksAwardedIfCorrect;
}
i++;
}
return new AssessmentResults
{
ItemsAttempted = responses.Count,
ItemsCorrect = ItemsCorrect,
TotalMarksAwarded = TotalMarksAwarded
};
}
}