test: use not before in TestAgentConnectionMonitor_* #21332
+15
−15
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fixes coder/internal#1203
The matcher I wrote for TestAgentConnectionMonitor tested that
last_disconnected_atwas strictly after the start of the test to ensure it was updated.This is too strict of a test because Windows in particular doesn't have high-resolution timers, so it's entirely possible to get the exact same timestamp from subsequent calls to
time.Now(). This PR switches the test to not before to cover this case. The results are just as valid because we always initialize thelast_disconnected_atto something well before the test starts.