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fix(dotnet): abstract classes should have proxy implementations (#241)
Abstract classes have can implementations that are not shared thorugh jsii. When trying to instantiate one for these types as a return value, the runtime crashes. This change creates proxy class types for abstract classes. These types can be instantiated, and have implementations for any methods/properties marked as abstract. Fixes #223 Add the ReturnsAbstract test to the complaince suite. This test ensures that proxy implementations are returned from methods that return a abstract class or interface. * Add .DS_Store to .gitignore * Rename JsiiInterfaceProxyAttribute to JsiiTypeProxy * Proxy implementations are sealed * Removed redundant checks for proxy resolution in runtime.
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188 changes: 188 additions & 0 deletions
188
...t-generator/src/Amazon.JSII.Generator.UnitTests/Class/AbstractClassProxyGeneratorTests.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,188 @@ | ||
| using Amazon.JSII.Generator.Class; | ||
| using Amazon.JSII.JsonModel.Spec; | ||
| using Xunit; | ||
|
|
||
| namespace Amazon.JSII.Generator.UnitTests.Class | ||
| { | ||
| public class AbstractClassProxyGeneratorTests : GeneratorTestBase | ||
| { | ||
| private const string Prefix = nameof(Generator) + "." + nameof(AbstractClassProxyGenerator) + "."; | ||
|
|
||
| private string Render(ClassType classType) | ||
| { | ||
| Symbols.MapTypeToPackage("myFqn", classType.Assembly); | ||
| Symbols.MapNamespace(classType.QualifiedNamespace, "MyNamespace"); | ||
| Symbols.MapTypeName("myFqn", "MyClass", TypeKind.Class); | ||
|
|
||
| var generator = new AbstractClassProxyGenerator(classType.Assembly, classType, Symbols, Namespaces); | ||
|
|
||
| var syntaxTree = generator.CreateSyntaxTree(); | ||
| return syntaxTree.ToString(); | ||
| } | ||
|
|
||
| [Fact(DisplayName = Prefix + nameof(IncludesAttribute))] | ||
| public void IncludesAttribute() | ||
| { | ||
| var classType = new ClassType | ||
| ( | ||
| "myFqn", | ||
| "myPackage", | ||
| "myClass", | ||
| true, | ||
| initializer: new Method(true, false, false) | ||
| ); | ||
|
|
||
| var actual = Render(classType); | ||
| var expected = | ||
| @"namespace MyNamespace | ||
| { | ||
| [JsiiTypeProxy(typeof(MyClass), ""myFqn"")] | ||
| internal sealed class MyClassProxy : MyClass | ||
| { | ||
| private MyClassProxy(ByRefValue reference): base(reference) | ||
| { | ||
| } | ||
| } | ||
| }"; | ||
| Assert.Equal(expected, actual, ignoreLineEndingDifferences: true); | ||
| } | ||
|
|
||
| [Fact(DisplayName = Prefix + nameof(IncludesDocs))] | ||
| public void IncludesDocs() | ||
| { | ||
| // Docs are not currently generated as part of the C# code. | ||
| ClassType classType = new ClassType | ||
| ( | ||
| fullyQualifiedName: "myFqn", | ||
| assembly: "myPackage", | ||
| name: "myClass", | ||
| isAbstract: true, | ||
| initializer: new Method(true, false, false), | ||
| docs: new Docs {{"foo", "bar"}} | ||
| ); | ||
|
|
||
| string actual = Render(classType); | ||
| string expected = | ||
| @"namespace MyNamespace | ||
| { | ||
| /// <remarks>foo: bar</remarks> | ||
| [JsiiTypeProxy(typeof(MyClass), ""myFqn"")] | ||
| internal sealed class MyClassProxy : MyClass | ||
| { | ||
| private MyClassProxy(ByRefValue reference): base(reference) | ||
| { | ||
| } | ||
| } | ||
| }"; | ||
| Assert.Equal(expected, actual, ignoreLineEndingDifferences: true); | ||
| } | ||
|
|
||
| [Fact(DisplayName = Prefix + nameof(IncludesProperties))] | ||
| public void IncludesProperties() | ||
| { | ||
| ClassType classType = new ClassType | ||
| ( | ||
| fullyQualifiedName: "myFqn", | ||
| assembly: "myPackage", | ||
| name: "myClass", | ||
| isAbstract: true, | ||
| initializer: new Method(true, false, false), | ||
| properties: new[] | ||
| { | ||
| new Property | ||
| ( | ||
| name: "myProp", | ||
| type: new TypeReference("myPropTypeFqn"), | ||
| isImmutable: false, | ||
| isAbstract: true, | ||
| isProtected: false | ||
| ), | ||
| new Property | ||
| ( | ||
| name: "notMyProp", | ||
| type: new TypeReference("myPropTypeFqn"), | ||
| isImmutable: false, | ||
| isAbstract: false, | ||
| isProtected: false | ||
| ) | ||
| } | ||
| ); | ||
|
|
||
| Symbols.MapTypeName("myPropTypeFqn", "MyPropType", TypeKind.Class); | ||
| Symbols.MapPropertyName("myFqn", "myProp", "MyProp"); | ||
|
|
||
| string actual = Render(classType); | ||
| string expected = | ||
| @"namespace MyNamespace | ||
| { | ||
| [JsiiTypeProxy(typeof(MyClass), ""myFqn"")] | ||
| internal sealed class MyClassProxy : MyClass | ||
| { | ||
| private MyClassProxy(ByRefValue reference): base(reference) | ||
| { | ||
| } | ||
| [JsiiProperty(""myProp"", ""{\""fqn\"":\""myPropTypeFqn\""}"")] | ||
| public override MyPropType MyProp | ||
| { | ||
| get => GetInstanceProperty<MyPropType>(); | ||
| set => SetInstanceProperty(value); | ||
| } | ||
| } | ||
| }"; | ||
| Assert.Equal(expected, actual, ignoreLineEndingDifferences: true); | ||
| } | ||
|
|
||
| [Fact(DisplayName = Prefix + nameof(IncludesMethods))] | ||
| public void IncludesMethods() | ||
| { | ||
| ClassType classType = new ClassType | ||
| ( | ||
| fullyQualifiedName: "myFqn", | ||
| assembly: "myPackage", | ||
| name: "myClass", | ||
| isAbstract: true, | ||
| initializer: new Method(true, false, false), | ||
| methods: new[] | ||
| { | ||
| new Method | ||
| ( | ||
| false, | ||
| false, | ||
| true, | ||
| name: "myMethod" | ||
| ), | ||
| new Method | ||
| ( | ||
| false, | ||
| false, | ||
| false, | ||
| name: "notMyMethod" | ||
| ) | ||
| } | ||
| ); | ||
|
|
||
| Symbols.MapMethodName("myFqn", "myMethod", "MyMethod"); | ||
|
|
||
| string actual = Render(classType); | ||
| string expected = | ||
| @"namespace MyNamespace | ||
| { | ||
| [JsiiTypeProxy(typeof(MyClass), ""myFqn"")] | ||
| internal sealed class MyClassProxy : MyClass | ||
| { | ||
| private MyClassProxy(ByRefValue reference): base(reference) | ||
| { | ||
| } | ||
| [JsiiMethod(""myMethod"", null, ""[]"")] | ||
| public override void MyMethod() | ||
| { | ||
| InvokeInstanceVoidMethod(new object[]{}); | ||
| } | ||
| } | ||
| }"; | ||
| Assert.Equal(expected, actual, ignoreLineEndingDifferences: true); | ||
| } | ||
| } | ||
| } |
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