Train game with tests

91_Train/csharp/Train/Train.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31129.286
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TrainGame", "Train\TrainGame.csproj", "{42617537-4E7C-4082-A17B-7F18DFA04C35}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TrainTests", "..\TrainTests\TrainTests\TrainTests.csproj", "{7C740A47-99C6-44E1-BDEE-140086BCFE8B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{42617537-4E7C-4082-A17B-7F18DFA04C35}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{42617537-4E7C-4082-A17B-7F18DFA04C35}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{42617537-4E7C-4082-A17B-7F18DFA04C35}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{42617537-4E7C-4082-A17B-7F18DFA04C35}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7C740A47-99C6-44E1-BDEE-140086BCFE8B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7C740A47-99C6-44E1-BDEE-140086BCFE8B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7C740A47-99C6-44E1-BDEE-140086BCFE8B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7C740A47-99C6-44E1-BDEE-140086BCFE8B}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {919F73B8-DE34-4992-9B05-E1FEC2D2F7C6}
+	EndGlobalSection
+EndGlobal

91_Train/csharp/Train/Train/TrainGame.cs

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+using System;
+using System.Linq;
+
+namespace Train
+{
+    public class TrainGame
+    {
+        private Random Rnd { get; } = new Random();
+        private readonly int ALLOWED_PERCENTAGE_DIFFERENCE = 5;
+
+        static void Main()
+        {
+            TrainGame train = new TrainGame();
+            train.GameLoop();
+        }
+
+        public void GameLoop()
+        {
+            DisplayIntroText();
+
+            do
+            {
+                PlayGame();
+            } while (TryAgain());
+        }
+
+        private void PlayGame()
+        {
+            int carSpeed = (int)GenerateRandomNumber(40, 25);
+            int timeDifference = (int)GenerateRandomNumber(5, 15);
+            int trainSpeed = (int)GenerateRandomNumber(20, 19);
+
+            Console.WriteLine($"A CAR TRAVELING {carSpeed} MPH CAN MAKE A CERTAIN TRIP IN");
+            Console.WriteLine($"{timeDifference} HOURS LESS THAN A TRAIN TRAVELING AT {trainSpeed} MPH");
+            Console.WriteLine("HOW LONG DOES THE TRIP TAKE BY CAR?");
+
+            double userInputCarJourneyDuration = double.Parse(Console.ReadLine());
+            double actualCarJourneyDuration = CalculateCarJourneyDuration(carSpeed, timeDifference, trainSpeed);
+            int percentageDifference = CalculatePercentageDifference(userInputCarJourneyDuration, actualCarJourneyDuration);
+
+            if (IsWithinAllowedDifference(percentageDifference, ALLOWED_PERCENTAGE_DIFFERENCE))
+            {
+                Console.WriteLine($"GOOD! ANSWER WITHIN {percentageDifference} PERCENT.");
+            }
+            else
+            {
+                Console.WriteLine($"SORRY.  YOU WERE OFF BY {percentageDifference} PERCENT.");
+            }
+            Console.WriteLine($"CORRECT ANSWER IS {actualCarJourneyDuration} HOURS.");
+        }
+
+        public static bool IsWithinAllowedDifference(int percentageDifference, int allowedDifference)
+        {
+            return percentageDifference <= allowedDifference;
+        }
+
+        private static int CalculatePercentageDifference(double userInputCarJourneyDuration, double carJourneyDuration)
+        {
+            return (int)(Math.Abs((carJourneyDuration - userInputCarJourneyDuration) * 100 / userInputCarJourneyDuration) + .5);
+        }
+
+        public static double CalculateCarJourneyDuration(double carSpeed, double timeDifference, double trainSpeed)
+        {
+            return timeDifference * trainSpeed / (carSpeed - trainSpeed);
+        }
+
+        public double GenerateRandomNumber(int baseSpeed, int multiplier)
+        {
+            return multiplier * Rnd.NextDouble() + baseSpeed;
+        }
+
+        private bool TryAgain()
+        {
+            Console.WriteLine("ANOTHER PROBLEM (YES OR NO)? ");
+            return IsInputYes(Console.ReadLine());
+        }
+
+        public static bool IsInputYes(string consoleInput)
+        {
+            var options = new string[] { "Y", "YES" };
+            return options.Any(o => o.Equals(consoleInput, StringComparison.CurrentCultureIgnoreCase));
+        }
+
+        private void DisplayIntroText()
+        {
+            Console.WriteLine("TRAIN");
+            Console.WriteLine("CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY");
+            Console.WriteLine();
+            Console.WriteLine("TIME - SPEED DISTANCE EXERCISE");
+            Console.WriteLine();
+        }
+    }
+}

91_Train/csharp/Train/Train/TrainGame.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>

91_Train/csharp/TrainTests/TrainTests/TrainGameTests.cs

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+using Train;
+using Xunit;
+
+namespace TrainTests
+{
+    public class TrainGameTests
+    {
+        [Fact]
+        public void MiniumRandomNumber()
+        {
+            TrainGame game = new TrainGame();
+            Assert.True(game.GenerateRandomNumber(10, 10) >= 10);
+        }
+
+        [Fact]
+        public void MaximumRandomNumber()
+        {
+            TrainGame game = new TrainGame();
+            Assert.True(game.GenerateRandomNumber(10, 10) <= 110);
+        }
+
+        [Fact]
+        public void IsInputYesWhenY()
+        {
+            Assert.True(TrainGame.IsInputYes("y"));
+        }
+
+        [Fact]
+        public void IsInputYesWhenNotY()
+        {
+            Assert.False(TrainGame.IsInputYes("a"));
+        }
+
+        [Fact]
+        public void CarDurationTest()
+        {
+            Assert.Equal(1, TrainGame.CalculateCarJourneyDuration(30, 1, 15) );
+        }
+
+        [Fact]
+        public void IsWithinAllowedDifference()
+        {
+            Assert.True(TrainGame.IsWithinAllowedDifference(5,5));
+        }
+
+
+        [Fact]
+        public void IsNotWithinAllowedDifference()
+        {
+            Assert.False(TrainGame.IsWithinAllowedDifference(6, 5));
+        }
+    }
+}

91_Train/csharp/TrainTests/TrainTests/TrainTests.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+
+    <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>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Train\Train\TrainGame.csproj" />
+  </ItemGroup>
+
+</Project>