const {hasKey} = require('./_30s.js');

const data = {
  a: 1,
  b: { c: 4 },
  'd.e': 5,
  'b.d': 2,
};

test('hasKey is a Function', () => {
  expect(hasKey).toBeInstanceOf(Function);
});

test('hasKey returns true for simple property', () => {
  expect(hasKey(data, ['a'])).toBe(true);
});

test('hasKey returns true for object property', () => {
  expect(hasKey(data, ['b'])).toBe(true);
});

test('hasKey returns true for nested property', () => {
  expect(hasKey(data, ['b', 'c'])).toBe(true);
});

test('hasKey returns true for property with dots', () => {
  expect(hasKey(data, ['d.e'])).toBe(true);
});

test('hasKey returns true for property with dots and same sibling key', () => {
  expect(hasKey(data, ['b.d'])).toBe(true);
});

test('hasKey returns false for non-existent property', () => {
  expect(hasKey(data, ['f'])).toBe(false);
});

test('hasKey returns false for virtual nested property', () => {
  expect(hasKey(data, ['d'])).toBe(false);
});

test('hasKey returns false for empty key list', () => {
  expect(hasKey(data, [])).toBe(false);
});