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test: Added tests
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‎MemoryModule.Tests/Given_DependentDll.cs‎

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using NUnit.Framework;
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using System;
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using System.Reflection;
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using System.Runtime.InteropServices;
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namespace MemoryModule.Tests
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{
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class Given_DependentDll
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{
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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delegate int AddNumberDelegate(int a, int b);
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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delegate void GreetDelegate();
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[Test]
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public void When_DependencyPreLoaded()
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{
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var random = new Random();
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for (int test = 0; test < 10; ++test)
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{
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string secretDll = Helper.GetDllName("Secret");
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var secretDllStream = Assembly.GetExecutingAssembly()
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.GetManifestResourceStream($"MemoryModule.Tests.{secretDll}");
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using var secretAsm = NativeAssembly.Load(secretDllStream, secretDll);
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string dllName = Helper.GetDllName("SampleDLL");
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var dllStream = Assembly.GetExecutingAssembly()
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.GetManifestResourceStream($"MemoryModule.Tests.{dllName}");
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using var asm = NativeAssembly.Load(dllStream);
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var addNumbers = asm.GetDelegate<AddNumberDelegate>("addNumbers");
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for (int i = 0; i < 100; ++i)
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{
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const int low = -1000000000;
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const int high = -low;
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var a = random.Next(low, high);
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var b = random.Next(low, high);
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Assert.AreEqual(a + b, addNumbers(a, b));
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}
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// Test if C++ causes any problems...
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var Greet = asm.GetDelegate<GreetDelegate>("Greet");
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Greet();
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}
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}
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[Test]
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public void When_DependencyLateResolve()
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{
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var random = new Random();
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NativeAssembly.AssemblyResolve += NativeAssembly_AssemblyResolve;
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for (int test = 0; test < 10; ++test)
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{
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string dllName = Helper.GetDllName("SampleDLL");
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var dllStream = Assembly.GetExecutingAssembly()
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.GetManifestResourceStream($"MemoryModule.Tests.{dllName}");
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using var asm = NativeAssembly.Load(dllStream);
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var addNumbers = asm.GetDelegate<AddNumberDelegate>("addNumbers");
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for (int i = 0; i < 100; ++i)
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{
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const int low = -1000000000;
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const int high = -low;
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var a = random.Next(low, high);
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var b = random.Next(low, high);
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Assert.AreEqual(a + b, addNumbers(a, b));
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}
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// Test if C++ causes any problems...
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var Greet = asm.GetDelegate<GreetDelegate>("Greet");
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Greet();
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}
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NativeAssembly NativeAssembly_AssemblyResolve(object sender, NativeResolveEventArgs args)
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{
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if (args.Name.Equals(Helper.GetDllName("Secret")))
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{
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args.ShouldDisposeAssembly = true;
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return NativeAssembly.Load(
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Assembly.GetExecutingAssembly().GetManifestResourceStream(
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$"MemoryModule.Tests.{Helper.GetDllName("Secret")}"
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)
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);
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}
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return null;
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}
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}
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}
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}

‎MemoryModule.Tests/Given_StandaloneDll.cs‎

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using NUnit.Framework;
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using System;
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using System.Reflection;
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using System.Runtime.InteropServices;
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namespace MemoryModule.Tests
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{
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public class Given_StandaloneDll
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{
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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delegate int GetSecretDelegate();
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[Test]
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public void When_Loaded()
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{
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// Sometimes, low-level segmentation fault can occur, without crashing the test.
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for (int test = 0; test < 10; ++test)
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{
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string dllName = Helper.GetDllName("Secret");
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var dllStream = Assembly.GetExecutingAssembly()
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.GetManifestResourceStream($"MemoryModule.Tests.{dllName}");
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using var asm = NativeAssembly.Load(dllStream);
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var secretFunc = asm.GetDelegate<GetSecretDelegate>("GetSecret");
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for (int i = 0; i < 10; ++i)
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{
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int result = secretFunc();
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Assert.AreEqual(result, Math.Clamp(result, 0, 100));
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}
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}
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}
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}
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}

‎MemoryModule.Tests/Helper.cs‎

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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace MemoryModule.Tests
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{
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internal static class Helper
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{
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public static string GetDllName(string displayName)
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{
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return $"{displayName}{(Environment.Is64BitProcess ? "64" : "")}.dll";
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}
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}
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}

‎MemoryModule.Tests/MemoryModule.Tests.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>netcoreapp3.1</TargetFramework>
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<IsPackable>false</IsPackable>
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</PropertyGroup>
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<ItemGroup>
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<None Remove="SampleDLL.dll" />
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<None Remove="SampleDLL64.dll" />
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<None Remove="Secret.dll" />
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<None Remove="Secret64.dll" />
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</ItemGroup>
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<ItemGroup>
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<EmbeddedResource Include="SampleDLL.dll" />
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<EmbeddedResource Include="SampleDLL64.dll" />
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<EmbeddedResource Include="Secret.dll" />
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<EmbeddedResource Include="Secret64.dll" />
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
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<PackageReference Include="NUnit" Version="3.13.1" />
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<PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
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<PackageReference Include="coverlet.collector" Version="3.0.2" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\MemoryModule\MemoryModule.csproj" />
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</ItemGroup>
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</Project>

‎MemoryModule.Tests/SampleDLL.dll‎

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‎MemoryModule.Tests/SampleDLL64.dll‎

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‎MemoryModule.Tests/Secret.dll‎

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‎MemoryModule.Tests/Secret64.dll‎

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‎MemoryModule.sln‎

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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DemoApp", "DemoApp\DemoApp.csproj", "{95A0C909-90EE-40A7-A6B6-F5901373E5C7}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MemoryModule.Tests", "MemoryModule.Tests\MemoryModule.Tests.csproj", "{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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{95A0C909-90EE-40A7-A6B6-F5901373E5C7}.Release|x64.Build.0 = Release|x64
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{95A0C909-90EE-40A7-A6B6-F5901373E5C7}.Release|x86.ActiveCfg = Release|Any CPU
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{95A0C909-90EE-40A7-A6B6-F5901373E5C7}.Release|x86.Build.0 = Release|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Debug|x64.ActiveCfg = Debug|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Debug|x64.Build.0 = Debug|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Debug|x86.ActiveCfg = Debug|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Debug|x86.Build.0 = Debug|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Release|Any CPU.Build.0 = Release|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Release|x64.ActiveCfg = Release|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Release|x64.Build.0 = Release|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Release|x86.ActiveCfg = Release|Any CPU
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{7B00B16F-5297-4EF6-AA2D-D4E70EE7A55B}.Release|x86.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE

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