fix(runtime): Do not lose exception in TS extends

src/NativeScript/ObjC/Constructor/ObjCConstructorBase.mm

@@ -280,6 +280,7 @@ static JSValue getInitializerForSwiftStyleConstruction(ExecState* execState, Obj
         }
 
         if (initializer && initializer.isCell()) {
+            auto scope = DECLARE_CATCH_SCOPE(vm);
             CallData callData;
             CallType callType = JSC::getCallData(execState->vm(), initializer, callData);
             ASSERT(callType != CallType::None);
@@ -294,8 +295,13 @@ static JSValue getInitializerForSwiftStyleConstruction(ExecState* execState, Obj
 
             ObjCConstructorBase* newTarget = jsCast<ObjCConstructorBase*>(execState->newTarget());
             id instance = [newTarget->klasses().known alloc];
-            JSValue thisValue;
+            if (scope.exception()) {
+                // When allocating a JS Derived native instance, it is possible to throw a JS exception.
+                // Discard the native instance and do not call an initializer for it.
+                return JSValue::encode(jsUndefined());
+            }
 
+            JSValue thisValue;
             Strong<AllocatedPlaceholder> allocatedPlaceHolder;
             if (ObjCConstructorNative* nativeConstructor = jsDynamicCast<ObjCConstructorNative*>(vm, constructor)) {
                 allocatedPlaceHolder = AllocatedPlaceholder::create(vm, jsCast<GlobalObject*>(execState->lexicalGlobalObject()), nativeConstructor->allocatedPlaceholderStructure(), instance, constructor->instancesStructure());

tests/TestRunner/app/Inheritance/TypeScriptTests.js

@@ -1,4 +1,30 @@
-var TSObject = (function (_super) {
+// TODO: Use TypeScript definitions when they get ready
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+    return function (d, b) {
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var __metadata = (this && this.__metadata) || function (k, v) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+var __param = (this && this.__param) || function (paramIndex, decorator) {
+    return function (target, key) { decorator(target, key, paramIndex); }
+};
+var TSObject = /** @class */ (function (_super) {
     __extends(TSObject, _super);
     function TSObject() {
         return _super !== null && _super.apply(this, arguments) || this;
@@ -58,14 +84,14 @@ var TSObject = (function (_super) {
     TSObject.returnsConstructorMethod = function () {
         return TSObject;
     };
+    TSObject.property = 1;
+    TSObject.ObjCExposedMethods = {
+        'voidSelector': { returns: interop.types.void },
+        'variadicSelector:x:': { returns: NSObject, params: [NSString, interop.types.int32] }
+    };
     return TSObject;
 }(TNSDerivedInterface));
-TSObject.property = 1;
-TSObject.ObjCExposedMethods = {
-    'voidSelector': { returns: interop.types.void },
-    'variadicSelector:x:': { returns: NSObject, params: [NSString, interop.types.int32] }
-};
-var TSObject1 = (function (_super) {
+var TSObject1 = /** @class */ (function (_super) {
     __extends(TSObject1, _super);
     function TSObject1() {
         return _super !== null && _super.apply(this, arguments) || this;
@@ -98,10 +124,10 @@ var TSObject1 = (function (_super) {
         enumerable: true,
         configurable: true
     });
+    TSObject1.ObjCProtocols = [TNSBaseProtocol2];
     return TSObject1;
 }(NSObject));
-TSObject1.ObjCProtocols = [TNSBaseProtocol2];
-var TSDecoratedObject = (function (_super) {
+var TSDecoratedObject = /** @class */ (function (_super) {
     __extends(TSDecoratedObject, _super);
     function TSDecoratedObject() {
         return _super !== null && _super.apply(this, arguments) || this;
@@ -116,16 +142,22 @@ var TSDecoratedObject = (function (_super) {
     TSDecoratedObject.staticFunc = function (x) {
         TNSLog('staticFunc:' + x + ' called');
     };
+    __decorate([
+        ObjCMethod(),
+        __metadata("design:type", Function),
+        __metadata("design:paramtypes", []),
+        __metadata("design:returntype", void 0)
+    ], TSDecoratedObject.prototype, "voidSelector", null);
+    __decorate([
+        ObjCMethod('variadicSelector:x:', NSObject),
+        __param(0, ObjCParam(NSString)), __param(1, ObjCParam(interop.types.int32)),
+        __metadata("design:type", Function),
+        __metadata("design:paramtypes", [Object, Object]),
+        __metadata("design:returntype", void 0)
+    ], TSDecoratedObject.prototype, "variadicSelectorX", null);
     return TSDecoratedObject;
 }(TNSDerivedInterface));
-__decorate([
-    ObjCMethod()
-], TSDecoratedObject.prototype, "voidSelector", null);
-__decorate([
-    ObjCMethod('variadicSelector:x:', NSObject),
-    __param(0, ObjCParam(NSString)), __param(1, ObjCParam(interop.types.int32))
-], TSDecoratedObject.prototype, "variadicSelectorX", null);
-var TSDecoratedObject1 = (function (_super) {
+var TSDecoratedObject1 = /** @class */ (function (_super) {
     __extends(TSDecoratedObject1, _super);
     function TSDecoratedObject1() {
         return _super !== null && _super.apply(this, arguments) || this;
@@ -158,12 +190,12 @@ var TSDecoratedObject1 = (function (_super) {
         enumerable: true,
         configurable: true
     });
+    TSDecoratedObject1 = __decorate([
+        ObjCClass(TNSBaseProtocol2)
+    ], TSDecoratedObject1);
     return TSDecoratedObject1;
 }(NSObject));
-TSDecoratedObject1 = __decorate([
-    ObjCClass(TNSBaseProtocol2)
-], TSDecoratedObject1);
-var UnusedConstructor = (function (_super) {
+var UnusedConstructor = /** @class */ (function (_super) {
     __extends(UnusedConstructor, _super);
     function UnusedConstructor() {
         var _this = _super !== null && _super.apply(this, arguments) || this;
@@ -238,6 +270,78 @@ describe(module.id, function () {
         expect(TNSGetOutput()).toBe('voidSelector called' +
             'variadicSelector:native x:9 called');
     });
+    it("MethodOverrides: errors", function () {
+        expect(function () {
+            var TSObjectErr1 = /** @class */ (function (_super) {
+                __extends(TSObjectErr1, _super);
+                function TSObjectErr1() {
+                    return _super !== null && _super.apply(this, arguments) || this;
+                }
+                Object.defineProperty(TSObjectErr1.prototype, "isEqual", {
+                    get: function () { return false; },
+                    enumerable: true,
+                    configurable: true
+                });
+                return TSObjectErr1;
+            }(NSObject));
+            return TSObjectErr1.alloc();
+        }).toThrowError(/Cannot override native method "isEqual" with a property, define it as a JS function instead./);
+        expect(function () {
+            var TSObjectErr2 = /** @class */ (function (_super) {
+                __extends(TSObjectErr2, _super);
+                function TSObjectErr2() {
+                    return _super !== null && _super.apply(this, arguments) || this;
+                }
+                return TSObjectErr2;
+            }(TNSDerivedInterface));
+            TSObjectErr2.prototype.isEqual = true;
+            return TSObjectErr2.alloc();
+        }).toThrowError(/true cannot override native method "isEqual"./);
+    });
+    it('ExposeWithWrongParams', function () {
+        expect(function () {
+            var ExposeWithWrongParams = /** @class */ (function (_super) {
+                __extends(ExposeWithWrongParams, _super);
+                function ExposeWithWrongParams() {
+                    return _super !== null && _super.apply(this, arguments) || this;
+                }
+                ExposeWithWrongParams.prototype.wrongRet = function () { };
+                ExposeWithWrongParams.ObjCExposedMethods = {
+                    'wrongRet': { returns: "a string", params: [interop.types.selector] }
+                };
+                return ExposeWithWrongParams;
+            }(NSObject));
+            return ExposeWithWrongParams.alloc();
+        }).toThrowError("\"a string\" Method wrongRet has an invalid return type encoding");
+        expect(function () {
+            var ExposeWithWrongParams2 = /** @class */ (function (_super) {
+                __extends(ExposeWithWrongParams2, _super);
+                function ExposeWithWrongParams2() {
+                    return _super !== null && _super.apply(this, arguments) || this;
+                }
+                ExposeWithWrongParams2.prototype.wrongArg = function () { };
+                ExposeWithWrongParams2.ObjCExposedMethods = {
+                    'wrongArg': { returns: interop.types.selector, params: [3] }
+                };
+                return ExposeWithWrongParams2;
+            }(NSObject));
+            return ExposeWithWrongParams2.alloc();
+        }).toThrowError("3 Method wrongArg has an invalid type encoding for argument 1");
+        expect(function () {
+            var ExposeWithWrongParams3 = /** @class */ (function (_super) {
+                __extends(ExposeWithWrongParams3, _super);
+                function ExposeWithWrongParams3() {
+                    return _super !== null && _super.apply(this, arguments) || this;
+                }
+                ExposeWithWrongParams3.prototype.wrongArg = function () { };
+                ExposeWithWrongParams3.ObjCExposedMethods = {
+                    'wrongArg': { returns: interop.types.void, params: { notArray: true } }
+                };
+                return ExposeWithWrongParams3;
+            }(NSObject));
+            return ExposeWithWrongParams3.alloc();
+        }).toThrowError("Object The 'params' property of method wrongArg is not an array");
+    });
     it('AddedNewProperty', function () {
         var object = TSObject.alloc().init();
         expect(object.method()).toBe(1);
@@ -257,12 +361,12 @@ describe(module.id, function () {
             'baseProtocolProperty1Optional called');
     });
     it('PlainExtends', function () {
-        var A = (function () {
+        var A = /** @class */ (function () {
             function A() {
             }
             return A;
         }());
-        var B = (function (_super) {
+        var B = /** @class */ (function (_super) {
             __extends(B, _super);
             function B() {
                 return _super !== null && _super.apply(this, arguments) || this;
@@ -273,7 +377,7 @@ describe(module.id, function () {
     });
     it('Scope', function () {
         global["Derived"] = 3;
-        var Derived = (function (_super) {
+        var Derived = /** @class */ (function (_super) {
             __extends(Derived, _super);
             function Derived() {
                 return _super !== null && _super.apply(this, arguments) || this;

tests/TestRunner/app/Inheritance/TypeScriptTests.ts

@@ -1,5 +1,9 @@
 // TODO: Use TypeScript definitions when they get ready
 
+declare function afterEach(param);
+declare function describe(name, func);
+declare function expect(param);
+declare function it(name, func);
 declare function TNSClearOutput();
 declare function TNSLog(message);
 declare function TNSGetOutput();
@@ -10,8 +14,16 @@ declare var module;
 declare function NSStringFromClass(klass);
 declare function NSClassFromString(klassName);
 
+declare function ObjCClass(param);
+declare function ObjCMethod(name?, param?);
+declare function ObjCParam(param);
+
 declare var interop;
-declare var jasmine;
+
+declare var global;
+
+declare var NSString: any;
+
 
 declare class NSObject {
     public static alloc();
@@ -297,6 +309,52 @@ describe(module.id, function () {
         );
     });
 
+    it("MethodOverrides: errors", function () {
+        expect(() => {
+            class TSObjectErr1 extends NSObject {
+                get isEqual() { return false; }
+            }
+            return TSObjectErr1.alloc();
+        }).toThrowError(/Cannot override native method "isEqual" with a property, define it as a JS function instead./);
+
+        expect(() => {
+            class TSObjectErr2 extends TNSDerivedInterface {
+            }
+            (TSObjectErr2.prototype as any).isEqual = true;
+            return TSObjectErr2.alloc();
+         }).toThrowError(/true cannot override native method "isEqual"./);
+    });
+
+    it('ExposeWithWrongParams', function () {
+        expect(() => {
+            class ExposeWithWrongParams extends NSObject {
+                wrongRet() {}
+                public static ObjCExposedMethods = {
+                    'wrongRet': { returns: "a string", params: [interop.types.selector] }
+                };
+            }
+            return ExposeWithWrongParams.alloc();
+        }).toThrowError("\"a string\" Method wrongRet has an invalid return type encoding");
+        expect(() => {
+            class ExposeWithWrongParams2 extends NSObject {
+                wrongArg() {}
+                public static ObjCExposedMethods = {
+                    'wrongArg': { returns: interop.types.selector, params: [3] }
+                };
+            }
+            return ExposeWithWrongParams2.alloc();
+        }).toThrowError("3 Method wrongArg has an invalid type encoding for argument 1");
+        expect(() => {
+            class ExposeWithWrongParams3 extends NSObject {
+                wrongArg() {}
+                public static ObjCExposedMethods = {
+                    'wrongArg': { returns: interop.types.void, params: { notArray: true } }
+                };
+            }
+            return ExposeWithWrongParams3.alloc();
+        }).toThrowError("Object The 'params' property of method wrongArg is not an array");
+    });
+
     it('AddedNewProperty', function () {
         var object = TSObject.alloc().init();
 
@@ -345,7 +403,7 @@ describe(module.id, function () {
    it('TypeScriptDecoratedShim', function () {
        expect(global.__decorate).toBeDefined();
        expect(global.__param).toBeDefined();
-    });    
+    });
 
     it('TypeScriptDecoratedProtocolImplementation', function () {
         var object = TSDecoratedObject1.alloc().init();
@@ -368,7 +426,7 @@ describe(module.id, function () {
             'variadicSelector:native x:9 called'
         );
     });
-    
+
     it('TypeScriptDecoratedExposedMethodsCalledFromJs', function () {
         var object = TSDecoratedObject.alloc().init();
 
@@ -382,5 +440,4 @@ describe(module.id, function () {
             'staticFunc:9 called'
         );
     });
-
 });

tests/TestRunner/app/Marshalling/ReferenceTests.js

@@ -153,14 +153,17 @@ describe(module.id, function () {
 
     it("CString should be passed as its UTF8 encoding and returned as a reference to unsigned characters", function () {
         const str = "test АБВГ";
-        const result = functionWithUCharPtr(str);
+        const ptr = interop.alloc(str.length*2 + 1); // alloc 2 bytes per character (although some of them are 1-byte chars)
+        strcpy(ptr, str);
+
+        const result = functionWithUCharPtr(ptr);
 
         expect(TNSGetOutput()).toBe(str);
 
         const strUtf8 = utf8.encode(str);
         for (i in strUtf8) {
-            const actual = strUtf8.charCodeAt(i);
-            const expected = result[i];
+            const actual = result[i];
+            const expected = strUtf8.charCodeAt(i);
             expect(actual).toBe(expected, `Char code difference at index ${i} ("${actual}" vs "${expected}")`);
         }
     });

tests/TestRunner/app/tsconfig.json

@@ -0,0 +1,16 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es5",
+        "experimentalDecorators": true,
+        "emitDecoratorMetadata": true,
+        "noEmitHelpers": false,
+        "noEmitOnError": true,
+        "lib": [
+            "es6",
+            "dom"
+        ]
+    },
+    "exclude": [
+    ]
+}