From 08271189d17eda58903dc728f4287c47183e367f Mon Sep 17 00:00:00 2001
From: Douglas Camata <159076+douglascamata@users.noreply.github.com>
Date: Wed, 29 Mar 2023 11:15:51 +0200
Subject: [PATCH] Create a Between MetricValueExpectation

Signed-off-by: Douglas Camata <159076+douglascamata@users.noreply.github.com>
---
 monitoring/metrics.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/monitoring/metrics.go b/monitoring/metrics.go
index ba4b7af..7471c90 100644
--- a/monitoring/metrics.go
+++ b/monitoring/metrics.go
@@ -201,6 +201,17 @@ func Less(value float64) MetricValueExpectation {
 	}
 }
 
+// Between is a MetricValueExpectation function for WaitSumMetrics that returns true if given single sum is between
+// the lower and upper bounds (non-inclusive, as in `lower < x < upper`).
+func Between(lower, upper float64) MetricValueExpectation {
+	return func(sums ...float64) bool {
+		if len(sums) != 1 {
+			panic("between: expected one value")
+		}
+		return sums[0] > lower && sums[0] < upper
+	}
+}
+
 // EqualsAmongTwo is an isExpected function for WaitSumMetrics that returns true if first sum is equal to the second.
 // NOTE: Be careful on scrapes in between of process that changes two metrics. Those are
 // usually not atomic.