Don't report humanise when round is used

docs/changelog.md

@@ -32,6 +32,8 @@
   sum(foo) without(instance) * on(app_name) group_left() bar
   ```
 - Don't log passwords when Prometheus URI is using basic authentication.
+- Fixed a false positive reports in [alerts/template](checks/alerts/template.md)
+  suggeting to use `humanize` on queries that already use `round()`.
 
 ## v0.30.2
 

internal/checks/alerts_template_test.go

@@ -784,6 +784,18 @@ func TestTemplateCheck(t *testing.T) {
   expr: foo > on() sum(rate(errors[2m])
   annotations:
     summary: "Seeing {{ $value }} instances with errors"
+`,
+			checker:    newTemplateCheck,
+			prometheus: noProm,
+			problems:   noProblems,
+		},
+		{
+			description: "humanize not needed on round(rate())",
+			content: `
+- alert: Foo
+  expr: round(rate(errors_total[5m]), 1) > 0
+  annotations:
+    summary: "Seeing {{ $value }} instances with errors"
 `,
 			checker:    newTemplateCheck,
 			prometheus: noProm,

internal/parser/utils/rate.go

@@ -13,7 +13,7 @@ func HasOuterRate(node *parser.PromQLNode) (calls []*promParser.Call) {
 		case "rate", "irate", "deriv":
 			calls = append(calls, n)
 			return calls
-		case "ceil", "floor":
+		case "ceil", "floor", "round":
 			return nil
 		}
 	}