Exemple #1
0
        public void AssemblyLoadContext_IfCustomContextsLoadReturnsNullAndDefaultContextHasAssemblyAssemblyFromDefaultContextIsBound()
        {
            // Arrange
            string solutionDir            = Path.GetFullPath(typeof(AssemblyLoadContextTests).GetTypeInfo().Assembly.Location + "../../../../../../..");
            string referenceeProjectName  = "StubProject.Referencee";
            string referenceeAssemblyPath = $"{solutionDir}/test/{referenceeProjectName}/bin/debug/netstandard1.1/{referenceeProjectName}.dll";
            string referencerProjectName  = "StubProject.Referencer";
            string referencerAssemblyPath = $"{solutionDir}/test/{referencerProjectName}/bin/debug/netstandard1.1/{referencerProjectName}.dll";

            AssemblyLoadContext.Default.LoadFromAssemblyPath(referenceeAssemblyPath);

            BasicAssemblyLoadContext loadContext = new BasicAssemblyLoadContext();

            // Act
            Assembly   referencerAssembly = loadContext.LoadFromAssemblyPath(referencerAssemblyPath);
            Type       type   = referencerAssembly.GetTypes().First();
            object     test   = Activator.CreateInstance(type);
            MethodInfo method = type.GetMethod("CreateReferenceeStubClassInstance", BindingFlags.Instance | BindingFlags.Public);
            object     referenceeStubInstance = method.Invoke(test, new object[] { });
            Assembly   referenceeAssembly     = referenceeStubInstance.GetType().GetTypeInfo().Assembly;

            // Assert
            Assert.NotNull(referencerAssembly);
            AssemblyLoadContext referencerLoadContext = AssemblyLoadContext.GetLoadContext(referencerAssembly);

            Assert.Equal(loadContext, referencerLoadContext);
            AssemblyLoadContext referenceeLoadContext = AssemblyLoadContext.GetLoadContext(referenceeAssembly);

            Assert.Equal(AssemblyLoadContext.Default, referenceeLoadContext);
        }
Exemple #2
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        public void AssemblyLoadContext_PropagatesExceptionsAcrossContextBoundaries()
        {
            // Arrange
            string solutionDir            = Path.GetFullPath(typeof(AssemblyLoadContextTests).GetTypeInfo().Assembly.Location + "../../../../../../..");
            string projectAndAssemblyName = "StubProject.ThrowsException";
            string assemblyPath           = $"{solutionDir}/test/{projectAndAssemblyName}/bin/debug/netstandard2.0/{projectAndAssemblyName}.dll";
            string testExceptionMessage   = "testExceptionMessage";

            BasicAssemblyLoadContext loadContext = new BasicAssemblyLoadContext();
            Assembly   assembly = loadContext.LoadFromAssemblyPath(assemblyPath);
            Type       throwsExceptionStubClass         = assembly.GetTypes().First();
            object     throwsExceptionStubClassInstance = Activator.CreateInstance(throwsExceptionStubClass);
            MethodInfo method = throwsExceptionStubClass.GetMethod("ThrowException", BindingFlags.Instance | BindingFlags.Public);

            // Act
            Exception result = null;

            try
            {
                method.Invoke(throwsExceptionStubClassInstance, new object[] { testExceptionMessage });
            }
            catch (Exception exception)
            {
                result = exception;
            }

            // Assert
            Assert.NotNull(result);
            Assert.Equal(testExceptionMessage, result.InnerException.Message);
        }
Exemple #3
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        public void AssemblyLoadContext_StaticsOfTheSameTypeInDifferentLoadContextsAreNotShared()
        {
            // Arrange
            string solutionDir            = Path.GetFullPath(typeof(AssemblyLoadContextTests).GetTypeInfo().Assembly.Location + "../../../../../../..");
            string projectAndAssemblyName = "StubProject.Statics";
            string projectFile            = $"{solutionDir}/test/{projectAndAssemblyName}/{projectAndAssemblyName}.csproj";
            string assemblyPath           = $"{solutionDir}/test/{projectAndAssemblyName}/bin/debug/netstandard2.0/{projectAndAssemblyName}.dll";

            Assembly  defaultALCAssembly = AssemblyLoadContext.Default.LoadFromAssemblyPath(assemblyPath);
            Type      defaultStubClass   = defaultALCAssembly.GetTypes().First();
            FieldInfo defaultField       = defaultStubClass.GetField("StaticField");
            object    defaultInstance    = Activator.CreateInstance(defaultStubClass);

            AssemblyLoadContext customContext     = new BasicAssemblyLoadContext();
            Assembly            customALCAssembly = customContext.LoadFromAssemblyPath(assemblyPath);
            Type      customStubClass             = customALCAssembly.GetTypes().First();
            FieldInfo customField    = customStubClass.GetField("StaticField");
            object    customInstance = Activator.CreateInstance(customStubClass);

            // Act
            defaultField.SetValue(defaultInstance, 1);
            customField.SetValue(customInstance, 2);

            // Assert
            Assert.Equal(1, defaultField.GetValue(defaultInstance));
        }
Exemple #4
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        public void AssemblyLoadContext_InstancesOfATypeFromTheSameAssemblyInDifferentContextsCannotBeUsedInterchangeably()
        {
            // Arrange
            string solutionDir            = Path.GetFullPath(typeof(AssemblyLoadContextTests).GetTypeInfo().Assembly.Location + "../../../../../../..");
            string projectAndAssemblyName = "StubProject.Referencee";
            string projectFile            = $"{solutionDir}/test/{projectAndAssemblyName}/{projectAndAssemblyName}.csproj";
            string assemblyPath           = $"{solutionDir}/test/{projectAndAssemblyName}/bin/debug/netstandard1.1/{projectAndAssemblyName}.dll";

            Assembly defaultALCAssembly = AssemblyLoadContext.Default.LoadFromAssemblyPath(assemblyPath);
            Type     defaultStubClass   = defaultALCAssembly.GetTypes().First();

            AssemblyLoadContext customContext     = new BasicAssemblyLoadContext();
            Assembly            customALCAssembly = customContext.LoadFromAssemblyPath(assemblyPath);
            Type customStubClass = customALCAssembly.GetTypes().First();

            // Act and Assert
            Assert.Throws <InvalidCastException>(() => Convert.ChangeType(Activator.CreateInstance(customStubClass), defaultStubClass));
        }
Exemple #5
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        public void AssemblyLoadContext_IfCustomContextsLoadReturnsNullAndDefaultContextHasDifferentVersionOfTheSameAssemblyAssemblyFromDefaultContextIsBoundd()
        {
            // Arrange
            string solutionDir  = Path.GetFullPath(typeof(AssemblyLoadContextTests).GetTypeInfo().Assembly.Location + "../../../../../../..");
            string projectName  = "StubProject.OlderFramework";
            string assemblyPath = $"{solutionDir}/test/{projectName}/bin/debug/netstandard1.0/{projectName}.dll";

            BasicAssemblyLoadContext loadContext = new BasicAssemblyLoadContext();

            // Act
            Assembly   projectAssembly                 = loadContext.LoadFromAssemblyPath(assemblyPath);
            Type       olderFrameworkStubClass         = projectAssembly.GetTypes().First();
            object     olderFrameworkStubClassInstance = Activator.CreateInstance(olderFrameworkStubClass);
            MethodInfo getString = olderFrameworkStubClass.GetMethod("GetString", BindingFlags.Instance | BindingFlags.Public);
            object     result    = getString.Invoke(olderFrameworkStubClassInstance, new object[] { });

            // Assert
            Assert.NotNull(result); // Older framework project references an older system.runtime version. Newer version from host was bound instead.
        }
Exemple #6
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        public void AssemblyLoadContext_AnInstanceofATypeFromAnAssemblyLoadedDynamicallyCanHaveItsMethodsCalledUsingReflection()
        {
            // Arrange
            string solutionDir            = Path.GetFullPath(typeof(AssemblyLoadContextTests).GetTypeInfo().Assembly.Location + "../../../../../../..");
            string projectAndAssemblyName = "StubProject.InstanceMethod";
            string assemblyPath           = $"{solutionDir}/test/{projectAndAssemblyName}/bin/debug/netstandard2.0/{projectAndAssemblyName}.dll";
            string testString             = "testString";

            AssemblyLoadContext loadContext            = new BasicAssemblyLoadContext();
            Assembly            assembly               = loadContext.LoadFromAssemblyPath(assemblyPath);
            Type       instanceMethodStubClass         = assembly.GetTypes().First();
            object     instanceMethodStubClassInstance = Activator.CreateInstance(instanceMethodStubClass);
            MethodInfo method = instanceMethodStubClass.GetMethod("GetString", BindingFlags.Instance | BindingFlags.Public);

            // Act
            String result = (string)method.Invoke(instanceMethodStubClassInstance, new object[] { testString });

            // Assert
            Assert.Equal(testString, result);
        }
Exemple #7
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        public void AssemblyLoadContext_AllowsDifferentVersionsOfTheSameAssemblyToBeLoadedInDifferentContexts()
        {
            // Arrange
            string solutionDir            = Path.GetFullPath(typeof(AssemblyLoadContextTests).GetTypeInfo().Assembly.Location + "../../../../../../..");
            string projectAndAssemblyName = "StubProject.Referencee";
            string projectFile            = $"{solutionDir}/test/{projectAndAssemblyName}/{projectAndAssemblyName}.csproj";
            string assemblyV1Path         = $"{solutionDir}/test/{projectAndAssemblyName}/bin/debug/netstandard1.1/{projectAndAssemblyName}.dll";
            string testVersion            = "2.0.0.0";

            _msBuildService.Build(projectFile, $"/t:build /p:OutDir={_tempDir},AssemblyVersion=2.0.0.0");  // TODO netstandard2.0 and earlier, AssemblyLoadContexts cannot be unloaded
            string assemblyV2Path = $"{_tempDir}/{projectAndAssemblyName}.dll";
            BasicAssemblyLoadContext loadContext = new BasicAssemblyLoadContext();

            // Act
            Assembly assemblyV1 = AssemblyLoadContext.Default.LoadFromAssemblyPath(assemblyV1Path);
            Assembly assemblyV2 = loadContext.LoadFromAssemblyPath(assemblyV2Path);

            // Assert
            Assert.Equal("1.0.0.0", assemblyV1.GetName().Version.ToString());
            Assert.Equal(testVersion, assemblyV2.GetName().Version.ToString());
        }