r = reseed()
	}
	// constants from Numerical Recipes
	r = r*1664525 + 1013904223
	randN = r
	randmu.Unlock()
	return strconv.Itoa(int(1e9 + r%1e9))[1:]
}

// isSameType - compares two object types via reflect.TypeOf
func isSameType(obj1, obj2 interface{}) bool {
	return reflect.TypeOf(obj1) == reflect.TypeOf(obj2)
}

// TestServer encapsulates an instantiation of a MinIO instance with a temporary backend.

		if testCase.expectedErrType == nil && err != nil {
			t.Errorf("Test %d, unexpected err is received: %v, expected:%v\n", i+1, err, testCase.expectedErrType)
		}
		if testCase.expectedErrType != nil && !isSameType(err, testCase.expectedErrType) {
			t.Errorf("Test %d, unexpected err is received: %v, expected:%v\n", i+1, err, testCase.expectedErrType)
		}
	}
}