[Solved] How can you verify in Cypress that a drag and drop file upload triggered the correct browser event? — Ans: Use cy.spy() on the drop event and assert it was called | Cypress

Cypress - File Operations

How can you verify in Cypress that a drag and drop file upload triggered the correct browser event?

AAssert the file size in the DOM element

BCheck the file input value directly after upload

CUse cy.wait() for a fixed time after upload

DUse cy.spy() on the drop event and assert it was called

Step-by-Step Solution

Solution:

Step 1: Understand event spying in Cypress
cy.spy() can monitor if specific events like 'drop' are triggered on elements.
Step 2: Apply spy to drop event
Attach spy to the drop event on the dropzone and assert it was called after drag and drop upload.
Step 3: Eliminate incorrect methods
Checking input value or file size does not confirm event firing; waiting fixed time is unreliable.
Final Answer:
Use cy.spy() on the drop event and assert it was called -> Option D
Quick Check:
Spy on drop event to verify upload event [OK]

Quick Trick: Spy on drop event to confirm drag-drop triggered [OK]

Common Mistakes:

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