How to test observables which emit grouped events with rxjs marbles?
问题 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$