fixed test cases

Author: shafeeqd959

packages/contentstack-config/test/unit/commands/region.test.ts

@@ -47,7 +47,7 @@ describe('Region command', function () {
       if (key === 'region') return undefined;
       return undefined;
     });
-    sinon.stub(process, 'exit').callsFake((code) => {
+    const exitStub = sinon.stub(process, 'exit').callsFake((code) => {
       throw new Error(`CLI_CONFIG_GET_REGION_NOT_FOUND EEXIT: ${code}`);
     });
     let result;
@@ -56,6 +56,7 @@ describe('Region command', function () {
     } catch (error) {
       result = error;
     }
+    exitStub.restore();
     expect(result.message).to.include('CLI_CONFIG_GET_REGION_NOT_FOUND EEXIT: 1');
   });