Viewing github.com/facebook/react/scripts/error-codes/__tests__/invertObject-test.js

```
/**
```

 * Copyright (c) Meta Platforms, Inc. and affiliates.

```
 *
```

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

```
 */
```
```
'use strict';
```

const invertObject = require('../invertObject');

const objectValues = target => Object.keys(target).map(key => target[key]);

```
describe('invertObject', () => {
```

  it('should return an empty object for an empty input', () => {

    expect(invertObject({})).toEqual({});

```
  });
```

  it('should invert key-values', () => {

```
    expect(
```
```
      invertObject({
```
```
        a: '3',
```
```
        b: '4',
```
```
      })
```
```
    ).toEqual({
```
```
      3: 'a',
```
```
      4: 'b',
```
```
    });
```
```
  });
```

  it('should take the last value when there are duplications in vals', () => {

```
    expect(
```
```
      invertObject({
```
```
        a: '3',
```
```
        b: '4',
```
```
        c: '3',
```
```
      })
```
```
    ).toEqual({
```
```
      4: 'b',
```
```
      3: 'c',
```
```
    });
```
```
  });
```

  it('should preserve the original order', () => {

```
    expect(
```
```
      Object.keys(
```
```
        invertObject({
```
```
          a: '3',
```
```
          b: '4',
```
```
          c: '3',
```
```
        })
```
```
      )
```
```
    ).toEqual(['3', '4']);
```
```
    expect(
```
```
      objectValues(
```
```
        invertObject({
```
```
          a: '3',
```
```
          b: '4',
```
```
          c: '3',
```
```
        })
```
```
      )
```
```
    ).toEqual(['c', 'b']);
```
```
  });
```
```
});
```

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