unit-testing__application-code

unit-test-application-code

Load and unit test application code without loading a web page

• Unit test your own application code libraries.
• Import modules using ES2015.
• Test simple math functions.
• Test the canonical fizzbuzz test.
• Automatically retry assertion until a given property inside an object:
  • is added or deleted
  • has expected value
• unit test asynchronous code using promises and async / await

In cypress/e2e folder the specs show:

• unit_test_application_code_spec.cy.js loads functions from the application and unit tests them.
• wait-for-object-property-spec.cy.js shows how Cypress can wrap and object and wait for a new property to be added to it (or deleted or modified).
• wait-for-window-property-spec.cy.js shows how an application can "signal" that it is ready to be tested by adding a property to the window object. The test will wait for the new property to appear.
• async-tests.cy.js shows how to unit test asynchronous functions from async-methods.js using Promises or async / await syntax

note: the specs load the application directly, there is no web server to start. Just do npm run cypress:run to open Cypress and run the unit tests.