// Start coding without a plan
test('parses valid JSON', () => {
  expect(parseConfig('{"key": "value"}')).toEqual({ key: 'value' })
})
// Pass, move on

test('handles nested objects', () => {
  expect(parseConfig('{"a": {"b": 1}}')).toEqual({ a: { b: 1 } })
})
// Pass, move on, forget about error cases

// Ship to production, crashes on invalid input
// Edge cases discovered by users, not tests

/*
 * Test List for parseConfig:
 * [x] parses valid JSON object
 * [x] parses nested objects
 * [x] parses arrays
 * [ ] throws on invalid JSON syntax
 * [ ] throws on non-object root (array, string, number)
 * [ ] handles empty object {}
 * [ ] handles unicode characters
 * [ ] handles escaped quotes in strings
 */

// Work through list systematically
test('parses valid JSON object', () => {
  expect(parseConfig('{"key": "value"}')).toEqual({ key: 'value' })
})

test('throws on invalid JSON syntax', () => {
  expect(() => parseConfig('{invalid}')).toThrow('Invalid JSON')
})

test('throws on non-object root', () => {
  expect(() => parseConfig('[1, 2, 3]')).toThrow('Config must be an object')
})

// Add new cases to list as you discover them
// Cross off completed tests