From e2946c5b87f7452fe2a8baea655abc9ae324f9dd Mon Sep 17 00:00:00 2001
From: mdsjip <2284562+mdsjip@users.noreply.github.com>
Date: Fri, 26 Aug 2022 13:13:56 +0200
Subject: [PATCH] fix(analysis): graphite metric provider - index out of range
 [0] with length 0

Signed-off-by: mdsjip <2284562+mdsjip@users.noreply.github.com>
---
 metricproviders/graphite/api.go      | 4 ++++
 metricproviders/graphite/api_test.go | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/metricproviders/graphite/api.go b/metricproviders/graphite/api.go
index b296295152..fc304395b1 100644
--- a/metricproviders/graphite/api.go
+++ b/metricproviders/graphite/api.go
@@ -68,6 +68,10 @@ func (api APIClient) Query(quer string) ([]dataPoint, error) {
 		return []dataPoint{}, err
 	}
 
+	if len(result) == 0 {
+		return []dataPoint{}, nil
+	}
+
 	return result[0].DataPoints, nil
 }
 
diff --git a/metricproviders/graphite/api_test.go b/metricproviders/graphite/api_test.go
index ce947da92f..bca62bbae2 100644
--- a/metricproviders/graphite/api_test.go
+++ b/metricproviders/graphite/api_test.go
@@ -82,6 +82,15 @@ func TestQuery(t *testing.T) {
 			}
 		]`, value, timestamp),
 		200,
+	}, {
+		"graphite response with empty array",
+		query,
+		targetQuery,
+		fromQuery,
+		[]dataPoint{},
+		nil,
+		`[]`,
+		200,
 	}, {
 		"graphite response body with invalid JSON",
 		query,