Imagine a scenario where we are working with the following snippet of JavaScript code.
object = _.isUndefined(object) ? '' : aDifferentObject.property;
Is it possible to write a Jasmine test that covers both scenarios?
Do we need to use two separate describe blocks? Or can we include a ternary conditional directly in the test?
Thank you! Jeremy
I plan to implement two separate describe functions in the following manner
// Function to be Tested
function fetchObjectValue() {
return _.isUndefined(object) ? '' : aDifferentObject.property;
}
// Test Cases
describe('when object is undefined', function() {
it('should return empty string', function() {
expect(fetchObjectValue()).toBe('');
});
});
describe('when object is not undefined', function () {
it('should return property from different object', function () {
expect(fetchObjectValue()).toBe(property);
});
});
Let's delve into a scenario using Angular JS/ES6/Jasmine with the Controller 'as' syntax.
Here is the code snippet:
Controller.toggleWidgetView = () => {
Controller.isFullScreenElement() ? Controller.goNormalScreen() : Controller.goFullScreen();
};
We have set up some test cases in Jasmine to ensure functionality:
describe('.toggleWidgetView()', function() {
it('should invoke goNormalScreen method', function() {
spyOn(Controller, 'isFullScreenElement').and.callFake(function(){
return true;
});
spyOn(Controller, 'goNormalScreen').and.callThrough();
Controller.toggleWidgetView();
expect(Controller.goNormalScreen).toHaveBeenCalled();
});
it('should call goFullScreen method', function() {
spyOn(Controller, 'isFullScreenElement').and.callFake(function(){
return false;
});
spyOn(Controller, 'goFullScreen').and.callThrough();
Controller.toggleWidgetView();
expect(Controller.goFullScreen).toHaveBeenCalled();
});
});
Both test cases have been successfully passed. The essence of these tests lies in invoking the 'toggleWidgetView' method twice, each time altering the condition (true/false) to mimic real-world scenarios.
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