Tips on testing external CSS properties with Jasmine and Karma

Exploring ways to verify an external CSS attribute with jasmine-karma

.purchase{
    width: 50%;
}
 <span class="purchase">
         Hello, I need to validate the width attribute
    </span>

Answer №1

Instead of directly checking the value of 50, you can retrieve the calculated width as shown below:

  it('should be present', () => {
    expect(component).toBeTruthy();
    const element = fixture.debugElement.query(By.css(".test")).nativeElement;
    console.log(getComputedStyle(element).width)
   // retrieved value could be '442.5px' or similar
  });

It is not advisable to verify trivial properties unless absolutely necessary.

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