Improve type consistency (#13)

* ✨ enhance Try class with TypeScript type safety in default method and add new test case

Signed-off-by: w01fgang <sumin@unix-center.ru>

* 🔖 bump version to 0.0.6 and add typecheck script

Signed-off-by: w01fgang <sumin@unix-center.ru>

---------

Signed-off-by: w01fgang <sumin@unix-center.ru>

Author: w01fgang

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@power-rent/try-catch",
-  "version": "0.0.5",
+  "version": "0.0.6",
   "description": "A TypeScript utility for simplified async error handling with Sentry integration",
   "main": "dist/index.js",
   "module": "dist/esm/index.js",
@@ -29,6 +29,7 @@
     "test": "vitest run",
     "test:watch": "vitest",
     "clean": "rm -rf dist",
+    "typecheck": "tsc --noEmit",
     "prepublishOnly": "npm run clean && npm run build && npm run test"
   },
   "keywords": [

src/__tests__/Try.test.ts

@@ -216,4 +216,16 @@ describe('Try', () => {
 
     await expect(exec).rejects.toThrow('validation error');
   });
+
+  it('should not give typescript error', async () => {
+    const params = { parameterKey: 'alpha' };
+
+    const result = await new Try(throwingFunction, params)
+      .default({ ok: true })
+      .value();
+
+    expect(result).not.toBe(undefined);
+    expect(() => result.ok).not.toThrow(TypeError);
+    expect(Sentry.captureException).not.toHaveBeenCalled();
+  });
 });

src/nextjs/index.ts

@@ -202,8 +202,14 @@ export class Try<T, TArgs extends readonly Record<string, any>[] = Record<string
    *   .value(); // Returns null if findUser throws
    * ```
    */
-  default<Return>(defaultValue: Return): Try<T, TArgs> {
-    return this.setConfig({ defaultValue });
+  default<D>(defaultValue: D): Omit<typeof this, 'value'> & { value(): Promise<Awaited<T> | D> } {
+    type WithGuaranteedValue = Omit<typeof this, 'value'> & {
+      value(): Promise<Awaited<T> | D>;
+    };
+
+    // Cast is safe: runtime shape is unchanged; this only narrows the static
+    // return type information for the `value` method.
+    return this.setConfig({ defaultValue }) as unknown as WithGuaranteedValue;
   }
 
   /**