Char array to string: net10.0, working solution file, new tests and a benchmark

strings-csharp/ConvertCharArray2String/ConvertCharArray2String.Benchmarks/CharArrayToStringBenchmarks.cs

@@ -0,0 +1,25 @@
+using BenchmarkDotNet.Attributes;
+
+namespace ConvertCharArray2String.Benchmarks;
+
+[MemoryDiagnoser]
+public class CharArrayToStringBenchmarks
+{
+    private char[] _charArray = [];
+
+    [Params(9, 1000)]
+    public int Length { get; set; }
+
+    [GlobalSetup]
+    public void Setup() =>
+        _charArray = Enumerable.Range(0, Length).Select(i => (char)('a' + i % 26)).ToArray();
+
+    [Benchmark(Baseline = true)]
+    public string StringConstructor() => new string(_charArray);
+
+    [Benchmark]
+    public string StringConcat() => string.Concat(_charArray);
+
+    [Benchmark]
+    public string StringJoin() => string.Join("", _charArray);
+}

strings-csharp/ConvertCharArray2String/ConvertCharArray2String.Benchmarks/ConvertCharArray2String.Benchmarks.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="BenchmarkDotNet" Version="0.15.8" />
+  </ItemGroup>
+
+</Project>

strings-csharp/ConvertCharArray2String/ConvertCharArray2String.Benchmarks/Program.cs

@@ -0,0 +1,4 @@
+using BenchmarkDotNet.Running;
+using ConvertCharArray2String.Benchmarks;
+
+BenchmarkRunner.Run<CharArrayToStringBenchmarks>(args: args);

strings-csharp/ConvertCharArray2String/ConvertCharArray2String.sln

@@ -1,31 +1,62 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
-VisualStudioVersion = 17.1.31911.260
+VisualStudioVersion = 17.0.31903.59
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConvertCharArray2String", "ConvertCharArray2String\ConvertCharArray2String.csproj", "{F21AE7B0-5961-431F-9573-CF567C362730}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConvertCharArray2String", "ConvertCharArray2String\ConvertCharArray2String.csproj", "{CC387591-8080-46EE-8045-62FB77775F15}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConvertCharArray2StringTests", "ConvertCharArray2StringTests\ConvertCharArray2StringTests.csproj", "{8359457A-7DEA-438D-9A3B-8725C41729C8}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConvertCharArray2StringTests", "ConvertCharArray2StringTests\ConvertCharArray2StringTests.csproj", "{269D6433-F548-49D7-AE0A-346ADBDEAFF3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConvertCharArray2String.Benchmarks", "ConvertCharArray2String.Benchmarks\ConvertCharArray2String.Benchmarks.csproj", "{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
 		Release|Any CPU = Release|Any CPU
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{E526D224-B8CE-4E46-AF6C-AB5A3987323C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{E526D224-B8CE-4E46-AF6C-AB5A3987323C}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{E526D224-B8CE-4E46-AF6C-AB5A3987323C}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{E526D224-B8CE-4E46-AF6C-AB5A3987323C}.Release|Any CPU.Build.0 = Release|Any CPU
-		{C1B5D5EE-1714-49E8-BAAA-5A31DA4C852E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{C1B5D5EE-1714-49E8-BAAA-5A31DA4C852E}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{C1B5D5EE-1714-49E8-BAAA-5A31DA4C852E}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{C1B5D5EE-1714-49E8-BAAA-5A31DA4C852E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Debug|x64.Build.0 = Debug|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Debug|x86.Build.0 = Debug|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Release|Any CPU.Build.0 = Release|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Release|x64.ActiveCfg = Release|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Release|x64.Build.0 = Release|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Release|x86.ActiveCfg = Release|Any CPU
+		{CC387591-8080-46EE-8045-62FB77775F15}.Release|x86.Build.0 = Release|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Debug|x64.Build.0 = Debug|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Debug|x86.Build.0 = Debug|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Release|x64.ActiveCfg = Release|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Release|x64.Build.0 = Release|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Release|x86.ActiveCfg = Release|Any CPU
+		{269D6433-F548-49D7-AE0A-346ADBDEAFF3}.Release|x86.Build.0 = Release|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Debug|x64.Build.0 = Debug|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Debug|x86.Build.0 = Debug|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Release|x64.ActiveCfg = Release|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Release|x64.Build.0 = Release|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Release|x86.ActiveCfg = Release|Any CPU
+		{9FF511B2-F0CB-4DD1-9EFF-965E49B7D636}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {6A5466CD-321D-46D4-B2B3-1E36EAF17EEC}
-	EndGlobalSection
 EndGlobal

strings-csharp/ConvertCharArray2String/ConvertCharArray2String/ConvertCharArray2String.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

strings-csharp/ConvertCharArray2String/ConvertCharArray2String/Program.cs

@@ -1,23 +1,27 @@
-using System.Text;
-
-namespace ConvertCharArray2String
-{
-    public class Program
-    {
-        public static void Main(string[] args)
-        {
-            char[] charArray = { 'c', 'o', 'd', 'e', ' ', 'm', 'a', 'z', 'e' };
-
-            var convertedToString = new string(charArray); 
-            Console.WriteLine(convertedToString);
-
-            var joinedToString = string.Join("", charArray); 
-            Console.WriteLine(joinedToString);
-
-            var concatedToString = string.Concat(charArray); 
-            Console.WriteLine(concatedToString);
-
-            Console.ReadLine();
-        }
-    }
-}
+char[] charArray = ['c', 'o', 'd', 'e', ' ', 'm', 'a', 'z', 'e'];
+
+var convertedToString = new string(charArray);
+
+Console.WriteLine(convertedToString);
+
+var partOfArray = new string(charArray, 0, 4);
+
+Console.WriteLine(partOfArray);
+
+var joinedToString = string.Join("", charArray);
+
+Console.WriteLine(joinedToString);
+
+var withDashes = string.Join("-", charArray);
+
+Console.WriteLine(withDashes);
+
+var concatedToString = string.Concat(charArray);
+
+Console.WriteLine(concatedToString);
+
+char letter = 'c';
+
+var fromChar = letter.ToString();
+
+Console.WriteLine(fromChar);

strings-csharp/ConvertCharArray2String/ConvertCharArray2StringTests/ConvertCharArray2StringTests.csproj

@@ -1,17 +1,17 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
-
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.11.0" />
-    <PackageReference Include="MSTest.TestAdapter" Version="2.2.7" />
-    <PackageReference Include="MSTest.TestFramework" Version="2.2.7" />
-    <PackageReference Include="coverlet.collector" Version="3.1.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.11.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="4.5.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="4.5.1" />
+    <PackageReference Include="coverlet.collector" Version="10.1.0" />
   </ItemGroup>
 
 </Project>

strings-csharp/ConvertCharArray2String/ConvertCharArray2StringTests/ConvertCharArrayTests.cs

@@ -1,38 +1,78 @@
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 
-namespace ConvertCharArray2StringTests
+namespace ConvertCharArray2StringTests;
+
+[TestClass]
+public class ConvertCharArrayTests
 {
-    [TestClass]
-    public class ConvertCharArrayTests
+    private readonly char[] _charArray = ['c', 'o', 'd', 'e', ' ', 'm', 'a', 'z', 'e'];
+
+    [TestMethod]
+    public void GivenCharArray_WhenConvertedByConstructor_ThenReturnString()
+    {
+        var convertedToString = new string(_charArray);
+
+        Assert.AreEqual("code maze", convertedToString);
+    }
+
+    [TestMethod]
+    public void GivenCharArray_WhenConvertedByJoin_ThenReturnString()
+    {
+        var joinedToString = string.Join("", _charArray);
+
+        Assert.AreEqual("code maze", joinedToString);
+    }
+
+    [TestMethod]
+    public void GivenCharArray_WhenConvertedByConcat_ThenReturnString()
+    {
+        var concatedToString = string.Concat(_charArray);
+
+        Assert.AreEqual("code maze", concatedToString);
+    }
+
+    [TestMethod]
+    public void GivenCharArray_WhenConvertedByConstructorWithRange_ThenReturnPartOfString()
     {
-        [TestMethod]
-        public void GivenCharArray_WhenConvertedByConstructor_ThenReturnString()
-        {
-            char[] charArray = { 'c', 'o', 'd', 'e', ' ', 'm', 'a', 'z', 'e' };
+        var partOfArray = new string(_charArray, 0, 4);
 
-            var convertedToString = new string(charArray);
-
-            Assert.AreEqual("code maze", convertedToString);
-        }
+        Assert.AreEqual("code", partOfArray);
+    }
 
-        [TestMethod]
-        public void GivenCharArray_WhenConvertedByJoin_ThenReturnString()
-        {
-            char[] charArray = { 'c', 'o', 'd', 'e', ' ', 'm', 'a', 'z', 'e' };
+    [TestMethod]
+    public void GivenSingleChar_WhenConvertedByToString_ThenReturnString()
+    {
+        char letter = 'c';
 
-            var joinedToString = string.Join("", charArray);
+        var fromChar = letter.ToString();
 
-            Assert.AreEqual("code maze", joinedToString);
-        }
+        Assert.AreEqual("c", fromChar);
+    }
 
-        [TestMethod]
-        public void GivenCharArray_WhenConvertedByConcat_ThenReturnString()
-        {
-            char[] charArray = { 'c', 'o', 'd', 'e', ' ', 'm', 'a', 'z', 'e' };
+    [TestMethod]
+    public void GivenCharArray_WhenJoinedWithSeparator_ThenReturnSeparatedString()
+    {
+        var withDashes = string.Join("-", _charArray);
+
+        Assert.AreEqual("c-o-d-e- -m-a-z-e", withDashes);
+    }
 
-            var concatedToString = string.Concat(charArray);
+    [TestMethod]
+    public void GivenNullCharArray_WhenConvertedByConstructor_ThenReturnEmptyString()
+    {
+        char[]? nothing = null;
+
+        var convertedToString = new string(nothing);
+
+        Assert.AreEqual(string.Empty, convertedToString);
+    }
+
+    [TestMethod]
+    public void GivenNullCharArray_WhenConvertedByConcatOrJoin_ThenThrowArgumentNullException()
+    {
+        char[]? nothing = null;
 
-            Assert.AreEqual("code maze", concatedToString);
-        }
+        Assert.ThrowsExactly<ArgumentNullException>(() => string.Concat(nothing!));
+        Assert.ThrowsExactly<ArgumentNullException>(() => string.Join("", nothing!));
     }
-}
+}