Тесты работают, TS билдится

src/app/data.ts

@@ -0,0 +1,50 @@
+import rfdc from 'rfdc'
+
+interface ValuesObject {
+    [key: string]: any
+}
+
+export abstract class Data {
+    static assign(vo: Data, values: ValuesObject): Data {
+        for (let key of Object.getOwnPropertyNames(values)) {
+            vo[key] = values[key]
+        }
+        return vo
+    }
+
+    [key: string]: any
+
+    set(key: string, value: any) {
+        this[key] = value
+    }
+
+    fromObject(obj: ValuesObject): void {
+        for (let key of Object.getOwnPropertyNames(obj)) {
+            if (key === '_id') continue
+            this[key] = obj[key]
+        }
+    }
+
+    toObject(exclude: string[] = []): object {
+        const obj = {} as ValuesObject
+        for (let key of Object.getOwnPropertyNames(this)) {
+            if (key.startsWith('__')) {
+                continue
+            }
+
+            if (exclude.includes(key)) continue
+
+            const type = typeof this[key]
+            if (type === 'object') {
+                obj[key] = rfdc()(this[key])
+            } else if (['function', 'undefined'].indexOf(type) >= 0) {
+                // ...
+            } else {
+                obj[key] = this[key]
+            }
+        }
+        return obj
+    }
+
+    abstract uniqKey(): string
+}