test (one's) self-control

Translations
испытать (чьё-либо) самообладание
The constant interruptions really tested her self-control.
Постоянные перебои действительно испытали её самообладание.
Definitions
To challenge or assess one's ability to resist temptations, impulses, or urges, often by placing oneself in situations where it is difficult to maintain discipline or restraint.
Words
self-control

noun
самоконтроль
test

verb
тестировать