According to rxjs marbles documentation the current behaviour for the sync groupings is the following:
'(ab)-(cd)': on frame 0, emits a and b then on frame 50, emits c and d
From the docs:
While it can be unintuitive at first, after all the values have synchronously emitted time will progress a number of frames equal to the number of ASCII characters in the group, including the parentheses
Ok, but how do I test an observable like this (using marbles or any other technique):
const observable$ = of(1, 2).concat(of(3, 4).delay(20));
Are there any workarounds?
There is a similar question on Stack Overflow but there is no answer on 'How to actually work around it and test this kind of observable'.
Thanks!
For my project I migrated to rx-sanbox where sync grouping works correct and it solved my problem.
So, in rx-sandbox this is correct:
'(ab)-(cd)': on frame 0, emits a and b then on frame 20, emits c and d