-added implementation for Object.hasOwnProperty (#235)

andreiradu · Perryvw · commit 3cb7c4fa9821 · 2018-10-13T16:33:34.000+02:00
diff --git a/src/Transpiler.ts b/src/Transpiler.ts
@@ -1162,6 +1162,10 @@ export abstract class LuaTranspiler {
             const name = this.transpileIdentifier(node.expression.name);
             if (name === "toString") {
                 return  `tostring(${this.transpileExpression(node.expression.expression)})`;
+            } else if (name === "hasOwnProperty") {
+                const expr = this.transpileExpression(node.expression.expression);
+                params = this.transpileArguments(node.arguments);
+                return `(rawget(${expr}, ${params} )~=nil)`;
             } else {
                 callPath =
                 `${this.transpileExpression(node.expression.expression)}:${name}`;
diff --git a/test/unit/class.spec.ts b/test/unit/class.spec.ts
@@ -201,7 +201,44 @@ export class ClassTests {
         // Assert
         Expect(result).toBe("instance of a");
     }
+    @Test("HasOwnProperty true")
+    public hasOwnProperty1(): void {
+        // Transpile
+        const lua = util.transpileString(
+            `class a {
+                public test(): void {
+                }
+            }
+            let inst = new a();
+            inst["prop"] = 17;
+            return inst.hasOwnProperty("prop");`
+        );
 
+        // Execute
+        const result = util.executeLua(lua);
+
+        // Assert
+        Expect(result).toBe(true);
+    }
+    @Test("HasOwnProperty false")
+    public hasOwnProperty2(): void {
+        // Transpile
+        const lua = util.transpileString(
+            `class a {
+                public test(): void {
+                }
+            }
+            let inst = new a();
+            inst["prop"] = 17;
+            return inst.hasOwnProperty("test");`
+        );
+
+        // Execute
+        const result = util.executeLua(lua);
+
+        // Assert
+        Expect(result).toBe(false);
+    }
     @Test("CastClassMethodCall")
     public extraParenthesisAssignment(): void {
         // Transpile
