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Viewing file:     transform-position.js (1.47 KB)      -rwxrwxr-x

var Delta = require('../../lib/delta');


describe('transformPosition()', function () {
  it('insert before position', function () {
    var delta = new Delta().insert('A');
    expect(delta.transform(2)).toEqual(3);
  });

  it('insert after position', function () {
    var delta = new Delta().retain(2).insert('A');
    expect(delta.transform(1)).toEqual(1);
  });

  it('insert at position', function () {
    var delta = new Delta().retain(2).insert('A');
    expect(delta.transform(2, true)).toEqual(2);
    expect(delta.transform(2, false)).toEqual(3);
  });

  it('delete before position', function () {
    var delta = new Delta().delete(2);
    expect(delta.transform(4)).toEqual(2);
  });

  it('delete after position', function () {
    var delta = new Delta().retain(4).delete(2);
    expect(delta.transform(2)).toEqual(2);
  });

  it('delete across position', function () {
    var delta = new Delta().retain(1).delete(4);
    expect(delta.transform(2)).toEqual(1);
  });

  it('insert and delete before position', function () {
    var delta = new Delta().retain(2).insert('A').delete(2);
    expect(delta.transform(4)).toEqual(3);
  });

  it('insert before and delete across position', function () {
    var delta = new Delta().retain(2).insert('A').delete(4);
    expect(delta.transform(4)).toEqual(3);
  });

  it('delete before and delete across position', function () {
    var delta = new Delta().delete(1).retain(1).delete(4);
    expect(delta.transform(4)).toEqual(1);
  });
});