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import pytest
from django_prometheus.testutils import assert_metric_diff, save_registry
from testapp.models import Dog, Lawn
def M(metric_name):
"""Make a full metric name from a short metric name.
This is just intended to help keep the lines shorter in test
cases.
"""
return f"django_model_{metric_name}"
@pytest.mark.django_db
class TestModelMetrics:
"""Test django_prometheus.models."""
def test_counters(self):
registry = save_registry()
cool = Dog()
cool.name = "Cool"
cool.save()
assert_metric_diff(registry, 1, M("inserts_total"), model="dog")
elysees = Lawn()
elysees.location = "Champs Elysees, Paris"
elysees.save()
assert_metric_diff(registry, 1, M("inserts_total"), model="lawn")
assert_metric_diff(registry, 1, M("inserts_total"), model="dog")
galli = Dog()
galli.name = "Galli"
galli.save()
assert_metric_diff(registry, 2, M("inserts_total"), model="dog")
cool.breed = "Wolfhound"
assert_metric_diff(registry, 2, M("inserts_total"), model="dog")
cool.save()
assert_metric_diff(registry, 2, M("inserts_total"), model="dog")
assert_metric_diff(registry, 1, M("updates_total"), model="dog")
cool.age = 9
cool.save()
assert_metric_diff(registry, 2, M("updates_total"), model="dog")
cool.delete() # :(
assert_metric_diff(registry, 2, M("inserts_total"), model="dog")
assert_metric_diff(registry, 2, M("updates_total"), model="dog")
assert_metric_diff(registry, 1, M("deletes_total"), model="dog")
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