prometheus/promql/testdata/selectors.test

load 10s
	http_requests{job="api-server", instance="0", group="production"}	0+10x1000 100+30x1000
	http_requests{job="api-server", instance="1", group="production"}	0+20x1000 200+30x1000
	http_requests{job="api-server", instance="0", group="canary"}		0+30x1000 300+80x1000
	http_requests{job="api-server", instance="1", group="canary"}		0+40x2000

eval instant at 8000s rate(http_requests[1m])
	{job="api-server", instance="0", group="production"} 1
	{job="api-server", instance="1", group="production"} 2
	{job="api-server", instance="0", group="canary"} 3
	{job="api-server", instance="1", group="canary"} 4

eval instant at 18000s rate(http_requests[1m])
	{job="api-server", instance="0", group="production"} 3
	{job="api-server", instance="1", group="production"} 3
	{job="api-server", instance="0", group="canary"} 8
	{job="api-server", instance="1", group="canary"} 4

eval instant at 8000s rate(http_requests{group=~"pro.*"}[1m])
	{job="api-server", instance="0", group="production"} 1
	{job="api-server", instance="1", group="production"} 2

eval instant at 18000s rate(http_requests{group=~".*ry", instance="1"}[1m])
	{job="api-server", instance="1", group="canary"} 4

eval instant at 18000s rate(http_requests{instance!="3"}[1m] offset 10000s)
	{job="api-server", instance="0", group="production"} 1
	{job="api-server", instance="1", group="production"} 2
	{job="api-server", instance="0", group="canary"} 3
	{job="api-server", instance="1", group="canary"} 4

eval instant at 18000s rate(http_requests[40s]) - rate(http_requests[1m] offset 10000s)
	{job="api-server", instance="0", group="production"} 2
	{job="api-server", instance="1", group="production"} 1
	{job="api-server", instance="0", group="canary"} 5
	{job="api-server", instance="1", group="canary"} 0