All files / xstate/test mapState.test.ts

100% Statements 18/18
100% Branches 0/0
100% Functions 6/6
100% Lines 18/18

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 681x 1x   1x 1x 1x               1x     1x 1x               1x     1x 1x                 1x     1x 1x                 1x     1x 1x                 1x      
import { assert } from 'chai';
import { mapState } from '../src/index';
 
describe('mapState()', () => {
  it('should return the first mapping found of a state', () => {
    const mapping = mapState(
      {
        a: 'state a',
        b: 'state b'
      },
      'b'
    );
 
    assert.strictEqual(mapping, 'state b');
  });
 
  it('should return undefined for unmapped states', () => {
    const mapping = mapState(
      {
        a: 'state a',
        b: 'state b'
      },
      'c'
    );
 
    assert.isUndefined(mapping);
  });
 
  it('should prioritize returning equivalent state mapping', () => {
    const mapping = mapState(
      {
        a: 'state a',
        b: 'state b',
        'b.b1': 'st b.b1'
      },
      'b.b1'
    );
 
    assert.strictEqual(mapping, 'st b.b1');
  });
 
  it('should return superstate mapping when substate is not found', () => {
    const mapping = mapState(
      {
        a: 'state a',
        b: 'state b',
        'b.b1': 'st b.b1'
      },
      'b.foo'
    );
 
    assert.strictEqual(mapping, 'state b');
  });
 
  it('should return superstate mapping when deep substate is not found', () => {
    const mapping = mapState(
      {
        a: 'state a',
        b: 'state b',
        'b.b1': 'state b.b1'
      },
      'b.b1.foo'
    );
 
    assert.strictEqual(mapping, 'state b.b1');
  });
});