feat: add 'has' method in bag class

src/__tests__/parameters.test.ts

@@ -23,24 +23,32 @@ test('constructor', () => {
     customParam: [new Test()]
   });
 
-  klient.parameters.merge({
+  const { parameters } = klient;
+
+  parameters.merge({
     name: 'KlientTest',
     customParam: [new Test(), new Test()]
   });
 
+  expect(parameters.has('request')).toBe(true);
+  expect(parameters.has('request.headers')).toBe(true);
+  expect(parameters.has('request.headers.Content-Type')).toBe(true);
+  expect(parameters.has('request.headers.Content-type')).toBe(false);
+  expect(parameters.has('request.unknown')).toBe(false);
+
   expect(klient.url).toBe('http://localhost');
   expect(klient.debug).toBe(true);
-  expect(klient.parameters.get('request.headers.Content-Type')).toBe('application/json');
-  expect(klient.parameters).toBeInstanceOf(Bag);
+  expect(parameters.get('request.headers.Content-Type')).toBe('application/json');
+  expect(parameters).toBeInstanceOf(Bag);
 
-  const customParam = klient.parameters.get('customParam');
+  const customParam = parameters.get('customParam');
 
   expect(customParam).toBeInstanceOf(Array);
   expect(customParam.length).toBe(2);
   expect(customParam[0]).toBeInstanceOf(Test);
   expect(customParam[1]).toBeInstanceOf(Test);
 
-  expect(klient.parameters.all()).toBeInstanceOf(Object);
-  expect(klient.parameters.all()).not.toBeInstanceOf(Bag);
-  expect(klient.parameters.all().name).toBe('KlientTest');
+  expect(parameters.all()).toBeInstanceOf(Object);
+  expect(parameters.all()).not.toBeInstanceOf(Bag);
+  expect(parameters.all().name).toBe('KlientTest');
 });

src/services/bag/bag.ts

@@ -19,6 +19,10 @@ export default class Bag implements BagItems, Watchable {
     return getWatchers(this);
   }
 
+  has(path: string) {
+    return objectPath.get(this, path) !== undefined;
+  }
+
   get(path: string) {
     return objectPath.get(this.all(), path);
   }