Open abcoathup opened 3 years ago
Also looking for support for this feature. Thanks
Would something like the following work, with a new options argument specifying the times the event should show up.
expectEvent(receipt, 'Foo', { arg1: 'bar' }, { times: 2 });
And this function would return the array of found events.
Not really, events could be emitted many times but with different values
In that case you can use subsequent calls to expectEvent
.
expectEvent(receipt, 'Foo', { arg1: 'bar' });
expectEvent(receipt, 'Foo', { arg1: 'quux' });
Otherwise I'm not sure I'm understanding the request. Can someone provide an example of what they would like to write and how they would want it to behave?
For example: my contract loops through the conditions, and each time generates the same event, but for example the result changes
if (x == 1 || x == 2) {
uint y = doCalc(some1, some0);
emit yCalculated(x, y); // Triggering event
if (x == 2) {
uint y2 = doCalc(some0, some1);
emit yCalculated(x, y2); // Triggering event
}
}
@SSharshunov In this you would also want to check that the events are emitted in the correct order?
if (x == 1 || x == 2) { uint y = doCalc(some1, some0); emit yCalculated(x, y); // Triggering event if (x == 2) { uint y2 = doCalc(some0, some1); emit yCalculated(x, y2); // Triggering event } }
Just call the expectEvent
and pass the right event name and the values of said events
If you are expecting 3 events of Transfer
expecteEvent(tx, 'Transfer', {from:0x.., to:0x.., value:value}
expecteEvent(tx, 'Transfer', {from:0x.., to:0x.., value:value}
expecteEvent(tx, 'Transfer', {from:0x.., to:0x.., value:value}
The value MUST be of type BigNumber
or a String
, else expectEvent
would give you a misleading error expected {expected} but got {actual}
cause it only throws the very first error in the error array, which isn't the actual error.
I had to go into the library function to find this.
Does anyone know how to use it for multiple events in one function?
Support
expectEvent
testing for multiple emits.Currently
expectEvent
will pass for 1 or more emits of the event.Raised by a community member in Telegram: https://forum.openzeppelin.com/t/test-for-multiple-emits-of-the-same-event-with-expectevent/4106