Question

我正在尝试拖动一个元素，然后将其拖放到放置区域，但是该测试未在Cypress.io中执行拖放操作。如果有人可以就此处的潜在问题提出建议，那将非常有帮助。没有抛出任何错误，但是这里并没有发生拖放。

describe('Verify the drag and drop test', function() {

  it.only('Check whether the drag and drop of an item is working fine', function() {

  cy.visit('http://www.seleniumeasy.com/test/drag-and-drop-demo.html')  

    const MyDataTransfer = function () {};
    const dt = new MyDataTransfer ();
    dt.types = [];

    // cy.wait(3000);

    cy.get('#todrag span')
      .contains('Draggable 1')
      .trigger("draggable", {dataTransfer: dt});

    cy.get("#todrag span")
      .contains('Draggable 1')
      .trigger('mousedown', { which: 1, pageX: 600, pageY: 600 })
      .trigger('mousemove', { which: 1, clientX: 330, clientY: 35 });

    cy.wait(3000);

    cy.get('#mydropzone')
      .trigger("dropzone", {dataTransfer: dt});                     
  });   
});

Answer 1

A few changes should achieve what you are looking for. Here's a breakdown of steps taken to solve this question...

First off, instead of stubbing out MyDataTransfer, just construct a new DataTransfer object, which comes packed with the necessary properties and methods needed for drag events:

const dataTransfer = new DataTransfer;

Next, it's best to trigger native drop and drag events, as opposed to draggable and dropzone. Selenium Easy is listening for dragstart, dragend, and drop (you can see this inside of their drag-and-drop-demo.js source file). Put these inside of a helper function, to be called later inside the test:

function dndIt() {
  cy.get('#todrag span:first-of-type')
    .trigger('dragstart', { dataTransfer });

  cy.get('#mydropzone')
    .trigger('drop', { dataTransfer });

  cy.get('#todrag span:first-of-type')
    .trigger('dragend');               // <-- seleniumeasy listens for this...
}                                      // otherwise, draggables are copied.

A beforeEach block is helpful for setting the viewport and visiting the application:

beforeEach(function() {
  cy.viewport(1000, 600);
  cy.visit('https://www.seleniumeasy.com/test/drag-and-drop-demo.html');
});

And finally, the test block calls the helper function, and asserts that the item was dragged and dropped:

it('Check whether the drag and drop of an item is working fine', function() {
  dndIt();

  cy.get('#droppedlist')
    .should(($el) => {
      expect($el.children()).to.have.lengthOf(1)
    });
});

Here's the solution in its entirety:

describe('Verify the drag and drop test', function() {
  const dataTransfer = new DataTransfer;

  function dndIt() {
    cy.get('#todrag span:first-of-type')
      .trigger('dragstart', { dataTransfer });

    cy.get('#mydropzone')
      .trigger('drop', { dataTransfer });

    cy.get('#todrag span:first-of-type')
      .trigger('dragend');               // <-- seleniumeasy listens for this...
  }                                      // if left out, draggables are copied.

  beforeEach(function() {
    cy.viewport(1000, 600);
    cy.visit('https://www.seleniumeasy.com/test/drag-and-drop-demo.html');
  });

  it('Check whether the drag and drop of an item is working fine', function() {
    dndIt();

    cy.get('#droppedlist')
      .should(($el) => {
        expect($el.children()).to.have.lengthOf(1)
      });
  });
});

The drag_n_drop_spec.js provided in the cypress-example-recipes repo was a helpful resource.

Cypress.io测试中不会发生拖放

1 个答案: