added toString() passthrough (#15)

ProbedJS · Apr 21, 2021 · fa3a930 · fa3a930
1 parent 2ca8c3f
commit fa3a930
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diff --git a/src/ApiTypes.ts b/src/ApiTypes.ts
@@ -48,6 +48,9 @@ export interface DynamicReaderBase<T> {
     removeListener(lst: (v: T) => void): void;
 
     readonly current: T;
+
+    /** gets string representation */
+    toString(): string;
 }
 
 /** Consumer API for a dynamic primitive. */

diff --git a/src/dynamic/Base.ts b/src/dynamic/Base.ts
@@ -55,6 +55,10 @@ export class DynamicBaseImpl<T> implements DynamicBase<T> {
         }
     }
 
+    toString(): string {
+        return `${this._value}`;
+    }
+
     addListener(lst: (v: T) => void): void {
         if (!this._notifier) {
             this._notifier = [];

diff --git a/tests/dynamicVal.test.ts b/tests/dynamicVal.test.ts
@@ -133,6 +133,19 @@ describe('Dynamic Value', () => {
         expect(b).toBe(2);
         expect(c).toBe(2);
     });
+
+    it('stringizes correctly', () => {
+        const x = dynamic(12);
+        expect(`${x}`).toBe('12');
+        expect(`` + x).toBe('12');
+    });
+
+    it('valueof works', () => {
+        const x = dynamic(12) as any;
+        const y = x + 12;
+
+        expect(y).toBe(24);
+    });
 });
 
 describe('Dependant value', () => {