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<ItemGroup>
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</ItemGroup>
</Project>

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namespace ExamCalendar.Test;
public sealed class ExamListTests
{
private readonly ExamList _list = new();
[Fact]
public void Construction()
{
_list.Count.Should().Be(0, "initially empty");
}
[Fact]
public void Insert_Single()
{
_list.Insert(CreateExam("M", new DateTime(2022, 11, 17)))
.Should().BeTrue("insert successful");
_list.Count.Should().Be(1);
}
[Fact]
public void Insert_Retrieve_Single()
{
var exam = CreateExam("M", new DateTime(2022, 11, 17));
_list.Insert(exam);
_list.GetAt(0).Should()
.NotBeNull("one exam has been inserted, index 0 exists")
.And.BeSameAs(exam, "same reference is returned");
}
[Fact]
public void Insert_Multiple_Sorted_InsertBefore()
{
_list.Insert(CreateExam("LOAL", new DateTime(2022, 11, 22)));
var exam = CreateExam("M", new DateTime(2022, 11, 17));
_list.Insert(exam);
_list.GetAt(0)
.Should().NotBeNull()
.And.BeSameAs(exam, "earlier exam inserted before later exam");
_list.Count.Should().Be(2, "two exams inserted");
}
[Fact]
public void Insert_Multiple_Sorted_InsertAfter()
{
_list.Insert(CreateExam("LOAL", new DateTime(2022, 11, 17)));
var exam = CreateExam("M", new DateTime(2022, 11, 21));
_list.Insert(exam);
_list.GetAt(1)
.Should().NotBeNull()
.And.BeSameAs(exam, "later exam inserted at end");
_list.Count.Should().Be(2);
}
[Fact]
public void Insert_Multiple_Sorted_InsertBetween()
{
_list.Insert(CreateExam("LOAL", new DateTime(2022, 11, 17)));
_list.Insert(CreateExam("D", new DateTime(2022, 11, 21)));
var exam = CreateExam("M", new DateTime(2022, 11, 18));
_list.Insert(exam);
_list.GetAt(1)
.Should().NotBeNull()
.And.BeSameAs(exam, "inserted between earlier and later exams");
CheckSubject(0, "LOAL");
CheckSubject(2, "D");
_list.Count.Should().Be(3);
}
[Fact]
public void Insert_Multiple()
{
_list.Insert(CreateExam("LOAL", new DateTime(2022, 11, 17)));
_list.Insert(CreateExam("D", new DateTime(2022, 11, 21)));
_list.Insert(CreateExam("PR", new DateTime(2022, 11, 30)));
_list.Insert(CreateExam("E", new DateTime(2022, 11, 10)));
var exam = CreateExam("M", new DateTime(2022, 11, 18));
_list.Insert(exam);
foreach (var (idx, subject) in new[]
{
(0, "E"),
(1, "LOAL"),
(2, "M"),
(3, "D"),
(4, "PR")
})
{
CheckSubject(idx, subject);
}
}
[Fact]
public void ToArray_Filled()
{
InsertSampleExams();
var examArray = _list.ToArray();
examArray.Length.Should().Be(5, "contains all exams in the list");
}
[Fact]
public void ToArray_Empty()
{
var examArray = _list.ToArray();
examArray.Length.Should().Be(0, "list is empty");
}
[Fact]
public void Interval_To()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 11, 16), new DateTime(2022, 11, 21));
searchResult.Length.Should().Be(3);
searchResult[0].Subject.Should().NotBeNull().And.Be("LOAL");
searchResult[2].Subject.Should().NotBeNull().And.Be("D");
}
[Fact]
public void Interval_From()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 11, 17), new DateTime(2022, 11, 22));
searchResult.Length.Should().Be(3);
searchResult[0].Subject.Should().NotBeNull().And.Be("LOAL");
searchResult[2].Subject.Should().NotBeNull().And.Be("D");
}
[Fact]
public void Interval_FromTo_Open()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 11, 16), new DateTime(2022, 11, 22));
searchResult.Length.Should().Be(3);
}
[Fact]
public void Interval_FromTo_Exact()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 11, 17), new DateTime(2022, 11, 21));
searchResult.Length.Should().Be(3);
}
[Fact]
public void Interval_EarlyFrom()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 11, 01), new DateTime(2022, 11, 22));
searchResult.Length.Should().Be(4);
}
[Fact]
public void Interval_LateTo()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 11, 19), new DateTime(2022, 12, 09));
searchResult.Length.Should().Be(2);
}
[Fact]
public void Interval_TooEarly()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 11, 01), new DateTime(2022, 11, 09));
searchResult.Length.Should().Be(0);
}
[Fact]
public void Interval_TooLate()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 12, 01), new DateTime(2022, 12, 09));
searchResult.Length.Should().Be(0);
}
[Fact]
public void Interval_BetweenExams()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 11, 22), new DateTime(2022, 11, 29));
searchResult.Length.Should().Be(0);
}
[Fact]
public void Interval_InvalidDateSpan()
{
InsertSampleExams();
var searchResult = _list.GetTestsInInterval(new DateTime(2022, 12, 01), new DateTime(2022, 11, 10));
searchResult.Length.Should().Be(0, "from > to");
}
[Fact]
public void Insert_SameDateTwice()
{
_list.Insert(CreateExam("E", new DateTime(2022, 11, 10)));
_list.Insert(CreateExam("LOAL", new DateTime(2022, 11, 17)));
_list.Insert(CreateExam("M", new DateTime(2022, 11, 18)));
_list.Insert(CreateExam("D", new DateTime(2022, 11, 21)));
_list.Insert(CreateExam("PR", new DateTime(2022, 11, 17)))
.Should().BeFalse("Date is already taken");
var searchResult = _list.GetTestsInInterval(DateTime.MinValue, new DateTime(2022, 11, 21));
searchResult.Length.Should().Be(4, "exam with duplicate date not added");
}
[Fact]
public void Insert_Saturday()
{
_list.Insert(CreateExam("M", new DateTime(2022, 11, 19)))
.Should().BeFalse("exam cannot happen on a Saturday");
_list.Count.Should().Be(0);
}
[Theory]
[InlineData("")]
[InlineData(null)]
public void Insert_InvalidSubject(string? subject)
{
_list.Insert(new Exam(subject, new DateTime(2022, 11, 17), "HASLM"))
.Should().BeFalse("invalid subject");
}
[Fact]
public void Insert_Null()
{
_list.Insert(null)
.Should().BeFalse("cannot insert null");
}
[Fact]
public void Remove_Exists()
{
_list.Insert(CreateExam("E", new DateTime(2022, 11, 10)));
_list.Insert(CreateExam("LOAL", new DateTime(2022, 11, 17)));
var exam = CreateExam("M", new DateTime(2022, 11, 18));
_list.Insert(exam);
_list.Insert(CreateExam("D", new DateTime(2022, 11, 21)));
_list.Insert(CreateExam("PR", new DateTime(2022, 11, 30)));
_list.Remove(new DateTime(2022, 11, 18), out var examRemoved)
.Should().BeTrue("exam existed and could be removed");
examRemoved.Should()
.NotBeNull("found")
.And.BeSameAs(exam, "correct one removed");
_list.Count.Should().Be(4, "one removed");
_list.ToArray().Length.Should().Be(4);
}
[Fact]
public void Remove_Empty()
{
_list.Remove(new DateTime(2022, 11, 18), out var examRemoved)
.Should().BeFalse("list is empty");
examRemoved.Should().BeNull("cannot remove from empty list");
_list.Count.Should().Be(0);
}
[Fact]
public void Remove_First()
{
InsertSampleExams();
var firstExam = _list.GetAt(0);
_list.Count.Should().Be(5);
firstExam.Should().NotBeNull();
_list.Remove(firstExam!.Date, out var examRemoved)
.Should().BeTrue("exam was found and removed");
examRemoved.Should().NotBeNull()
.And.BeSameAs(firstExam, "correct exam removed");
_list.Count.Should().Be(4);
_list.ToArray().Length.Should().Be(4);
}
[Fact]
public void Remove_Last()
{
InsertSampleExams();
var lastExam = _list.GetAt(_list.Count - 1);
lastExam.Should().NotBeNull();
_list.Remove(lastExam!.Date, out var examRemoved)
.Should().BeTrue("exam was found and removed");
examRemoved.Should().NotBeNull()
.And.BeSameAs(lastExam, "correct exam removed");
_list.Count.Should().Be(4);
}
[Fact]
public void Remove_Single()
{
var exam = CreateExam("E", new DateTime(2022, 11, 10));
_list.Insert(exam);
_list.Count.Should().Be(1);
_list.Remove(exam.Date, out var removedExam)
.Should().BeTrue();
_list.Count.Should().Be(0);
removedExam.Should().NotBeNull()
.And.BeSameAs(exam);
_list.ToArray().Length.Should().Be(0);
}
private void CheckSubject(int index, string expectedSubject)
{
_list.GetAt(index)?.Subject
.Should().NotBeNull().And.Be(expectedSubject);
}
private void InsertSampleExams()
{
_list.Insert(CreateExam("E", new DateTime(2022, 11, 10)));
_list.Insert(CreateExam("LOAL", new DateTime(2022, 11, 17)));
_list.Insert(CreateExam("M", new DateTime(2022, 11, 18)));
_list.Insert(CreateExam("D", new DateTime(2022, 11, 21)));
_list.Insert(CreateExam("PR", new DateTime(2022, 11, 30)));
}
private static Exam CreateExam(string subject, DateTime date, string teacher = "HASLM") =>
new(subject, date, teacher);
}

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Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.4.33103.184
MinimumVisualStudioVersion = 10.0.40219.1
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ExamCalendar", "ExamCalendar\ExamCalendar.csproj", "{7F30E637-BAFE-42FA-A173-F42B3902ED3B}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ExamCalendar.Test", "ExamCalendar.Test\ExamCalendar.Test.csproj", "{161D9B2A-4E8B-43B6-A77E-40BED559521F}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{7F30E637-BAFE-42FA-A173-F42B3902ED3B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{7F30E637-BAFE-42FA-A173-F42B3902ED3B}.Debug|Any CPU.Build.0 = Debug|Any CPU
{7F30E637-BAFE-42FA-A173-F42B3902ED3B}.Release|Any CPU.ActiveCfg = Release|Any CPU
{7F30E637-BAFE-42FA-A173-F42B3902ED3B}.Release|Any CPU.Build.0 = Release|Any CPU
{161D9B2A-4E8B-43B6-A77E-40BED559521F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{161D9B2A-4E8B-43B6-A77E-40BED559521F}.Debug|Any CPU.Build.0 = Debug|Any CPU
{161D9B2A-4E8B-43B6-A77E-40BED559521F}.Release|Any CPU.ActiveCfg = Release|Any CPU
{161D9B2A-4E8B-43B6-A77E-40BED559521F}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
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GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {D322E690-379C-4802-8F7E-1AC6AD090D59}
EndGlobalSection
EndGlobal

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@ -0,0 +1,25 @@
Prüfungsart;Name;Fach;Lehrkraft;Datum;Von;Bis
Lernbüroabgabe;1E1;1E1;MADER;13.10.21;11:50;12:40
Schularbeit;AM SA;0AM;KORN;05.11.21;11:50;12:40
Test;Test;0BOBW;APOLL;11.11.21;08:55;09:45
Test;PROO C# 1. Test;2PROO;SCHROE;16.11.21;12:45;15:25
Test;PRPR - C - Test 1;0PRPR;GRULE;23.11.21;12:45;17:15
Test;Englisch Test ;2E1;WELL;01.12.21;11:50;12:40
Schularbeit;E-SA;1E1;MADER;01.12.21;12:45;13:35
Schularbeit;Deutschschularbeit;0D;LUGA;07.12.21;10:00;11:45
Test;WEBT Test;1WMC;SCHROE, HASLM;13.12.21;10:55;11:45
Lernbüroabgabe;Abgabe LB U3;1E1;MADER;15.12.21;11:50;12:40
Test;Chemietest;0NWC;ERNE;20.12.21;10:00;10:50
Test;Netzwerke;1NSCS;KASER, WAG;22.12.21;10:55;11:45
Test;PRPR - C - Test 2;0PRPR;GRULE;11.01.22;12:45;15:25
Lernbüroabgabe;1E1;1E1;MADER;19.01.22;11:50;12:40
Schularbeit;AM SA;0AM;KORN;20.01.22;10:55;11:45
Test;0RWBW;0RWBW;ARZT;24.01.22;08:00;08:50
Test;Test WS CABS;0CABS;FREYP;27.01.22;12:45;13:35
Test;PROO C# 2. Test;2PROO;SCHROE;01.02.22;14:35;17:15
Test;0RWBW;0RWBW;ARZT;07.02.22;08:00;08:50
Lernbüroabgabe;1E1;1E1;MADER;16.02.22;11:50;12:40
Test;Test;0BOBW;APOLL;03.03.22;08:55;09:45
Schularbeit;2. E-SA;2E1;WELL;25.05.22;11:50;13:35
Schularbeit;E-SA;1E1;MADER;25.05.22;12:45;13:35
Test;Test SS CABS;0CABS;FREYP;09.06.22;12:45;13:35
1 Prüfungsart Name Fach Lehrkraft Datum Von Bis
2 Lernbüroabgabe 1E1 1E1 MADER 13.10.21 11:50 12:40
3 Schularbeit AM SA 0AM KORN 05.11.21 11:50 12:40
4 Test Test 0BOBW APOLL 11.11.21 08:55 09:45
5 Test PROO C# 1. Test 2PROO SCHROE 16.11.21 12:45 15:25
6 Test PRPR - C - Test 1 0PRPR GRULE 23.11.21 12:45 17:15
7 Test Englisch Test 2E1 WELL 01.12.21 11:50 12:40
8 Schularbeit E-SA 1E1 MADER 01.12.21 12:45 13:35
9 Schularbeit Deutschschularbeit 0D LUGA 07.12.21 10:00 11:45
10 Test WEBT Test 1WMC SCHROE, HASLM 13.12.21 10:55 11:45
11 Lernbüroabgabe Abgabe LB U3 1E1 MADER 15.12.21 11:50 12:40
12 Test Chemietest 0NWC ERNE 20.12.21 10:00 10:50
13 Test Netzwerke 1NSCS KASER, WAG 22.12.21 10:55 11:45
14 Test PRPR - C - Test 2 0PRPR GRULE 11.01.22 12:45 15:25
15 Lernbüroabgabe 1E1 1E1 MADER 19.01.22 11:50 12:40
16 Schularbeit AM SA 0AM KORN 20.01.22 10:55 11:45
17 Test 0RWBW 0RWBW ARZT 24.01.22 08:00 08:50
18 Test Test WS CABS 0CABS FREYP 27.01.22 12:45 13:35
19 Test PROO C# 2. Test 2PROO SCHROE 01.02.22 14:35 17:15
20 Test 0RWBW 0RWBW ARZT 07.02.22 08:00 08:50
21 Lernbüroabgabe 1E1 1E1 MADER 16.02.22 11:50 12:40
22 Test Test 0BOBW APOLL 03.03.22 08:55 09:45
23 Schularbeit 2. E-SA 2E1 WELL 25.05.22 11:50 13:35
24 Schularbeit E-SA 1E1 MADER 25.05.22 12:45 13:35
25 Test Test SS CABS 0CABS FREYP 09.06.22 12:45 13:35

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net9.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
</PropertyGroup>
<ItemGroup>
<Folder Include="Data" />
</ItemGroup>
<ItemGroup>
<None Update="Data\Tests-2AHIF-2122.csv">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
</ItemGroup>
<ItemGroup>
<PackageReference Include="HTLLeonding.Utility.LeoAnalyzers" Version="1.0.2" />
</ItemGroup>
</Project>

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namespace ExamCalendar;
/// <summary>
/// Represents a linked list of exams
/// </summary>
public sealed class ExamList
{
//private Node? _head;
/// <summary>
/// Gets the number of exams currently stored in the list
/// </summary>
public int Count { get; private set; }
/// <summary>
/// Insert a new exam into the list. Exams are stored sorted by their date.
/// Exams cannot occur on weekends, must have a subject and cannot be null.
/// There also cannot be two exams at the same day.
/// </summary>
/// <param name="exam">Exam to add</param>
/// <returns>True if the exam could be added; false otherwise</returns>
public bool Insert(Exam? exam)
{
// TODO
return false;
}
/// <summary>
/// Returns the exam at the specified position if there is any
/// </summary>
/// <param name="position">Index of the exam in the list</param>
/// <returns>The exam at this position or null if there is none</returns>
public Exam? GetAt(int position)
{
// TODO
return null;
}
/// <summary>
/// Returns an array containing the exams stored in this list.
/// This array contains the references, not copies.
/// </summary>
/// <returns>An array containing the elements of the list</returns>
public Exam[] ToArray()
{
// TODO
return [];
}
/// <summary>
/// Returns exams within the specified time frame
/// </summary>
/// <param name="from">Inclusive lower bound</param>
/// <param name="to">Inclusive upper bound</param>
/// <returns>An array of exams which are planned in the specified time frame</returns>
public Exam[] GetTestsInInterval(DateTime from, DateTime to)
{
// TODO
return [];
}
/// <summary>
/// Removes and returns the exam which is planned at the specified date from the list.
/// Exam can only be removed if it exists.
/// </summary>
/// <param name="removeDate">Date of the exam which to remove</param>
/// <param name="removedTest">Reference to the removed exam, if any</param>
/// <returns>True if the exam could be removed; false otherwise</returns>
public bool Remove(DateTime removeDate, out Exam? removedTest)
{
// TODO
removedTest = null;
return false;
}
}

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namespace ExamCalendar;
/// <summary>
/// Represents an exam for a specific subject scheduled for a specific date.
/// </summary>
/// <param name="Subject">Subject in which the exam will be taken</param>
/// <param name="Date">Planned date of the exam</param>
/// <param name="Teacher">Teacher grading the exam</param>
public record Exam(string? Subject, DateTime Date, string Teacher);
/// <summary>
/// Represents a node which can be linked together with other nodes to create a list
/// </summary>
public sealed class Node
{
/// <summary>
/// Creates a new instance of the <see cref="Node"/> class
/// </summary>
/// <param name="exam">The exam to handle with this node</param>
public Node(Exam exam)
{
Data = exam;
}
/// <summary>
/// Gets the exam contained within the node
/// </summary>
public Exam Data { get; }
/// <summary>
/// Gets or sets the next pointer of the node
/// </summary>
public Node? Next { get; set; }
}

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using System.Text;
using ExamCalendar;
Console.OutputEncoding = Encoding.UTF8;
Console.WriteLine("*** Exam Calendar ***");
const string FileName = "Data/Tests-2AHIF-2122.csv";
Console.WriteLine("List of Exams");
Console.WriteLine("=============");
var examList = CreateListFromCsv(FileName);
Console.WriteLine($"{"Subject",-8} {"Date",-10} Teacher");
for (var i = 0; i < examList.Count; i++)
{
var exam = examList.GetAt(i);
if (exam == null)
{
continue;
}
Console.WriteLine($"{exam.Subject,-8} {exam.Date.ToShortDateString()} {exam.Teacher}");
}
Console.ReadKey();
return;
static ExamList CreateListFromCsv(string fileName)
{
var testList = new ExamList();
// TODO read CSV file
return testList;
}

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:sectnums:
:nofooter:
:toc: left
:icons: font
:data-uri:
:source-highlighter: highlightjs
:stem: latexmath
= Col.04 -- Training
It is paramount that you are totally comfortable implementing collections based on linked nodes -- with different requirements, on your own and quickly.
This assignment consists of two more exercises for training exactly that.
NOTE: Generics are not required for these exercises, we'll come back to that topic soon
== Exam Calendar Management
You are going to implement an application which manages the exam of a school class.
* Exam information can be read from a CSV file
* Exams are stored in a list
** This list stores them _sorted_ by date
** It allows for:
*** Adding exams
*** Removing exams
*** Finding exams in a specific date range
*** Being converted into an array
* Exams have a subject, a date and a teacher
* At each day there can only be a single exam
[plantuml]
----
@startuml
hide empty methods
class Exam {
+string? Subject [readonly]
+DateTime Date [readonly]
+string Teacher [readonly]
}
class Node {
+Exam Data [readonly]
+Node? Next
+Node(Exam)
}
class ExamList {
-Node? _head
+int Count [private set]
+bool Insert(Exam?)
+Exam? GetAt(int)
+Exam[] ToArray()
+Exam[] GetExamsInInterval(DateTime, DateTime)
+bool Remove(DateTime, out Exam?)
}
Exam "1" -u- "0..1" Node: contains
ExamList "1" -r- "0..1" Node: contains
Node -- "0..1" Node: next
@enduml
----
TIP: Extensive unit tests have been provided -- those together with the XMLDoc should guide you to the correct implementation
=== Sample Run
You have been provided with the real exam schedule from a past year.
Processing it with your application should yield the following result.
image::pics/exam_cal_sample_run.png[Exam List Sample Run,width=300]
== Doctor's Waiting Room
In this exercise you are going to implement the waiting room of a doctor's office.
* Patients arrive at different times
* They are treated in order of their arrival
* However, some patients are emergency cases, these are treated first
** Arrival order _within_ the group of emergency patients still applies
* A patient can be declared an emergency while already waiting as a 'normal' patient
[plantuml]
----
@startuml
hide empty methods
class Node {
+Patient Data [readonly]
+Node? Next
+Node(Patient)
}
class Patient {
+string Name [readonly]
+DateTime Arrival [readonly]
+bool IsEmergency
+Patient(string, DateTime)
+Patient(string, DateTime, bool)
}
class PatientQueue {
-Node? _head
+int Size [readonly]
+void Enqueue(Patient)
+Patient? Dequeue()
+bool Remove(Patient)
}
class WaitingRoom {
-PatientQueue _emergencyQueue [readonly]
-PatientQueue _normalQueue [readonly]
+int CountEmergency [readonly]
+int CountNormal [readonly]
+int CountAll [readonly]
+string ToString() [override]
+void AddPatient(Patient)
+Patient? Next()
+void SetPatientToEmergency(Patient)
}
Node "0..1" -u- "1" Patient: contains
Node "0..1" -l- "1" PatientQueue: contains
WaitingRoom "1" -- "2" PatientQueue: has
Node -- "0..1" Node: next
@enduml
----
* The starter code initially does not compile -- add the missing pieces in `Node` and `Patient` first
* Some unit tests have been provided

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waiting_room/.gitignore vendored Normal file
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# Created by https://www.toptal.com/developers/gitignore/api/csharp,visualstudio
# Edit at https://www.toptal.com/developers/gitignore?templates=csharp,visualstudio
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@ -0,0 +1,27 @@
namespace WaitingRoom.Test;
public sealed class PatientTests
{
private const string Name = "Hans";
private readonly DateTime _arrivalTime = DateTime.Now;
[Fact]
public void Construction_Normal()
{
var p = new Patient(Name, _arrivalTime);
p.IsEmergency.Should().BeFalse("regular patient");
p.Name.Should().Be(Name);
p.Arrival.Should().Be(_arrivalTime);
}
[Fact]
public void Construction_Emergency()
{
var p = new Patient(Name, _arrivalTime, true);
p.IsEmergency.Should().BeTrue("emergency patient");
p.Name.Should().Be(Name);
p.Arrival.Should().Be(_arrivalTime);
}
}

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net9.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
<IsPackable>false</IsPackable>
</PropertyGroup>
<ItemGroup>
<Using Include="FluentAssertions" />
<Using Include="Xunit" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="FluentAssertions" Version="7.0.0" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
<PackageReference Include="xunit" Version="2.9.2" />
<PackageReference Include="xunit.runner.visualstudio" Version="3.0.0">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
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<PackageReference Include="coverlet.collector" Version="6.0.3">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\WaitingRoom\WaitingRoom.csproj" />
</ItemGroup>
</Project>

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namespace WaitingRoom.Test;
public sealed class WaitingRoomTests
{
private const string Name = "Susi";
private readonly DateTime _arrivalTime = DateTime.Now;
private readonly WaitingRoom _waitingRoom = new();
[Fact]
public void Empty()
{
CheckCounts(0, 0);
_waitingRoom.ToString().Should().Be("0 Emergency 0 Normal");
}
[Fact]
public void Add_Single_Normal()
{
var p = new Patient(Name, _arrivalTime);
_waitingRoom.AddPatient(p);
CheckCounts(1, 0);
_waitingRoom.ToString().Should().Be("0 Emergency 1 Normal");
}
[Fact]
public void NextPatient()
{
var p = new Patient(Name, _arrivalTime);
_waitingRoom.AddPatient(p);
CheckCounts(1, 0);
var next = _waitingRoom.Next();
next.Should()
.NotBeNull("patient was waiting");
next?.Name.Should().Be(Name);
next?.Arrival.Should().Be(_arrivalTime);
next?.IsEmergency.Should().BeFalse();
CheckCounts(0, 0);
}
[Fact]
public void Add_Multiple_Normal()
{
var p1 = new Patient(Name, _arrivalTime);
_waitingRoom.AddPatient(p1);
var p2 = new Patient("BeforeFirst", _arrivalTime.AddMinutes(-5));
_waitingRoom.AddPatient(p2);
var p3 = new Patient("AfterFirst", _arrivalTime.AddMinutes(15));
_waitingRoom.AddPatient(p3);
CheckCounts(3, 0);
var next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p2, "patients are ordered by arrival time");
CheckCounts(2, 0);
next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p1);
CheckCounts(1, 0);
next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p3);
CheckCounts(0, 0);
}
[Fact]
public void Add_Multiple_Emergency()
{
var p1 = new Patient("FirstEmergency", _arrivalTime, true);
_waitingRoom.AddPatient(p1);
var p2 = new Patient("BeforeFirst", _arrivalTime.AddMinutes(-5));
_waitingRoom.AddPatient(p2);
var p3 = new Patient("AfterFirst", _arrivalTime.AddMinutes(15));
_waitingRoom.AddPatient(p3);
var p4 = new Patient("AnotherEmergency", _arrivalTime.AddMinutes(20), true);
_waitingRoom.AddPatient(p4);
CheckCounts(2, 2);
var next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p1, "first arrived emergency");
CheckCounts(2, 1);
next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p4, "second emergency - treated before normal patients");
CheckCounts(2, 0);
next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p2, "first arrived normal patient");
CheckCounts(1, 0);
}
[Fact]
public void ChangeToEmergency()
{
var p1 = new Patient("FirstEmergency", _arrivalTime, true);
_waitingRoom.AddPatient(p1);
var p2 = new Patient("BeforeFirst", _arrivalTime.AddMinutes(-5));
_waitingRoom.AddPatient(p2);
var p3 = new Patient("AfterFirst", _arrivalTime.AddMinutes(15));
_waitingRoom.AddPatient(p3);
var p4 = new Patient("VeryLatePatient", _arrivalTime.AddMinutes(20));
_waitingRoom.AddPatient(p4);
CheckCounts(3, 1);
var next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p1, "first emergency");
CheckCounts(3, 0);
_waitingRoom.SetPatientToEmergency(p4);
p4.IsEmergency.Should().BeTrue("changed");
CheckCounts(2, 1);
next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p4, "promoted to emergency");
CheckCounts(2, 0);
next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p2, "regular next normal patient");
CheckCounts(1, 0);
next = _waitingRoom.Next();
next.Should().NotBeNull()
.And.BeSameAs(p3, "final patient");
CheckCounts(0, 0);
}
private void CheckCounts(int normal, int emergency)
{
_waitingRoom.CountNormal.Should().Be(normal);
_waitingRoom.CountEmergency.Should().Be(emergency);
_waitingRoom.CountAll.Should().Be(normal + emergency);
}
}

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@ -0,0 +1,31 @@

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.4.33103.184
MinimumVisualStudioVersion = 10.0.40219.1
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WaitingRoom", "WaitingRoom\WaitingRoom.csproj", "{7F30E637-BAFE-42FA-A173-F42B3902ED3B}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WaitingRoom.Test", "WaitingRoom.Test\WaitingRoom.Test.csproj", "{161D9B2A-4E8B-43B6-A77E-40BED559521F}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{7F30E637-BAFE-42FA-A173-F42B3902ED3B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{7F30E637-BAFE-42FA-A173-F42B3902ED3B}.Debug|Any CPU.Build.0 = Debug|Any CPU
{7F30E637-BAFE-42FA-A173-F42B3902ED3B}.Release|Any CPU.ActiveCfg = Release|Any CPU
{7F30E637-BAFE-42FA-A173-F42B3902ED3B}.Release|Any CPU.Build.0 = Release|Any CPU
{161D9B2A-4E8B-43B6-A77E-40BED559521F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{161D9B2A-4E8B-43B6-A77E-40BED559521F}.Debug|Any CPU.Build.0 = Debug|Any CPU
{161D9B2A-4E8B-43B6-A77E-40BED559521F}.Release|Any CPU.ActiveCfg = Release|Any CPU
{161D9B2A-4E8B-43B6-A77E-40BED559521F}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {D322E690-379C-4802-8F7E-1AC6AD090D59}
EndGlobalSection
EndGlobal

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@ -0,0 +1,10 @@
namespace WaitingRoom;
/// <summary>
/// Represents a node which holds patient data and can be linked with other
/// nodes to form the waiting queue
/// </summary>
public sealed class Node
{
// TODO
}

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@ -0,0 +1,24 @@
namespace WaitingRoom;
/// <summary>
/// Represents a patient waiting to be treated by a doctor
/// </summary>
public sealed class Patient
{
// TODO ctor
/// <summary>
/// Gets the name of the patient
/// </summary>
public string Name { get; }
/// <summary>
/// Gets date and time the patient arrived at the doctor's office
/// </summary>
public DateTime Arrival { get; }
/// <summary>
/// Gets or sets if this patient is an emergency case
/// </summary>
public bool IsEmergency { get; set; }
}

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@ -0,0 +1,47 @@
namespace WaitingRoom;
/// <summary>
/// A queue implementation which can be used to represents the waiting queue of
/// patients at a doctor's office.
/// </summary>
public sealed class PatientQueue
{
//private Node? _head;
/// <summary>
/// Gets the number of patients currently waiting in this queue
/// </summary>
public int Size { get; private set; }
/// <summary>
/// Adds a new patient to the queue.
/// Patients are ordered by arrival time.
/// </summary>
/// <param name="patient">Patient to add to the queue</param>
public void Enqueue(Patient patient)
{
// TODO
}
/// <summary>
/// Removes the next patient from the queue.
/// </summary>
/// <returns>The next patient to be treated; null if no patient is waiting</returns>
public Patient? Dequeue()
{
// TODO
return null;
}
/// <summary>
/// Removes the supplied patient from the queue.
/// Only patients actually waiting in this queue can be removed.
/// </summary>
/// <param name="patient">The patient to remove from the queue</param>
/// <returns>True if the patient could be removed; false otherwise</returns>
public bool Remove(Patient patient)
{
// TODO
return false;
}
}

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@ -0,0 +1,5 @@
using System.Text;
Console.OutputEncoding = Encoding.UTF8;
Console.WriteLine("*** Waiting Room ***");

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@ -0,0 +1,65 @@
namespace WaitingRoom;
/// <summary>
/// Represents the waiting room at a doctor's office.
/// Keeps an emergency and a normal waiting queue.
/// Emergency patients are treated first; patients within the same queue are
/// treated according to their arrival time.
/// </summary>
public sealed class WaitingRoom
{
private readonly PatientQueue _emergencyQueue = new();
private readonly PatientQueue _normalQueue = new();
/// <summary>
/// Gets the current number of emergency patients waiting
/// </summary>
// TODO
public int CountEmergency => -1;
/// <summary>
/// Gets the current number of normal patients waiting
/// </summary>
// TODO
public int CountNormal => -1;
/// <summary>
/// Gets the current number of all patients waiting
/// </summary>
// TODO
public int CountAll => -1;
/// <summary>
/// Creates a string representation of the waiting room, showing statistics
/// about waiting patients
/// </summary>
/// <returns>String representation of the waiting room</returns>
public override string ToString() => $"{CountEmergency} Emergency {CountNormal} Normal";
/// <summary>
/// Admits a new patient to the waiting room.
/// Patient will be added to either the normal or the emergency queue, depending on its state.
/// </summary>
/// <param name="patient">Patient to admit</param>
public void AddPatient(Patient patient)
{
// TODO
}
/// <summary>
/// Returns the next patient to be treated, removing it from its waiting queue
/// </summary>
/// <returns>Next patient to treat, if any</returns>
// TODO
public Patient? Next() => null;
/// <summary>
/// Promotes a patient to be an emergency case.
/// The patient has to be moved from the normal to the emergency queue.
/// </summary>
/// <param name="patient">Patient to declare an emergency for</param>
public void SetPatientToEmergency(Patient patient)
{
// TODO
}
}

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@ -0,0 +1,15 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net9.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
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<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="HTLLeonding.Utility.LeoAnalyzers" Version="1.0.2" />
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