tests

tests #749

Job	Run time
test (1.16.x, ubuntu-latest)	2m 14s
e2e_test (0.14, examples/basic)	38s
test (1.16.x, macos-latest)	2m 59s
e2e_test (0.14, examples/advanced)	38s
test (1.16.x, windows-latest)	6m 38s
e2e_test (0.14, examples/ips)	30s
e2e_test (0.14, examples/on_call_calendars)	30s
e2e_test (1.0, examples/basic)	39s
e2e_test (1.0, examples/advanced)	39s
e2e_test (1.0, examples/ips)	30s
e2e_test (1.0, examples/on_call_calendars)	31s
e2e_test (1.8, examples/basic)	44s
e2e_test (1.8, examples/advanced)	38s
e2e_test (1.8, examples/ips)	30s
e2e_test (1.8, examples/on_call_calendars)	33s
e2e_test (latest, examples/basic)	34s
e2e_test (latest, examples/advanced)	35s
e2e_test (latest, examples/ips)	39s
e2e_test (latest, examples/on_call_calendars)	31s
	21m 10s

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