How to mock query functions in AlertManager unit tests

[Emmanuel Alan Ferreyra Montes]

I'm trying to run some tests over an alert I've added but I haven't been able to "mock" of defining the value of the function "time". Do you know how to do it?

I'm currently doing this:

- interval: 5m
input_series:
- series: 'probe_ssl_earliest_cert_expiry{instance="instance1", job="job-1"}'
values: '17000000 35000000 5000000 10000000'
- series: 'time'
values: '100000000 20000000 25000000 30000000'
alert_rule_test:
- alertname: CertificateExpiry
eval_time: 0m
exp_alerts:
- exp_labels:
severity: warning
instance: instance1
exp_annotations:
summary: "Certificate in instance1 is due to expiry in less than 30 days"
description: "Certificate in instance1 is due to expiry in less than 30 days."

and the alert is defined as follow:

- alert: CertificateExpiry
expr: probe_ssl_earliest_cert_expiry - time() < 86400 * 30
labels:
severity: warning
annotations:
summary: "Certificate in {{ $labels.instance }} is due to expiry in less than 30 days"
description: "Certificate in {{ $labels.instance }} is due to expiry in less than 30 days."

Do you know how can I define the values of time in the same way I do it with the series?

Thanks in advance,

Emmanuel

[sayf eddine Hammemi]

Imo it is easier to generate your test cases dynamically, you can in that case choose the values based on the current time

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[Emmanuel Alan Ferreyra Montes]

At some point, I will need to define that time function (rather here or in the recording rule) so it won't be enough to relay on the current time.

[Emmanuel Alan Ferreyra Montes]

Ohh, you mean, relaying on the current time of the test. Let me check if I can do it

[Emmanuel Alan Ferreyra Montes]

Wonderful. It worked: 

- interval: 5m
input_series:
- series: 'probe_ssl_earliest_cert_expiry{instance="instance1", job="job-1"}'

values: ''2600000 2400000 2200000 2000000'

- series: 'time'
values: '100000000 20000000 25000000 30000000'
alert_rule_test:
- alertname: CertificateExpiry
eval_time: 0m
exp_alerts:
- exp_labels:
severity: warning
instance: instance1
exp_annotations:
summary: "Certificate in instance1 is due to expiry in less than 30 days"
description: "Certificate in instance1 is due to expiry in less than 30 days."

Thank you sayf!