From 717dd8adac15e12d270e3e792f7604c9c9680f66 Mon Sep 17 00:00:00 2001
From: beorn7 <beorn@soundcloud.com>
Date: Thu, 15 Sep 2016 15:23:55 +0200
Subject: [PATCH] web: add more federation test scenarios

---
 web/federate_test.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/web/federate_test.go b/web/federate_test.go
index 4e0d1feff..7537a129c 100644
--- a/web/federate_test.go
+++ b/web/federate_test.go
@@ -37,6 +37,11 @@ var scenarios = map[string]struct {
 		code:   200,
 		body:   ``,
 	},
+	"match nothing": {
+		params: "match[]=does_not_match_anything",
+		code:   200,
+		body:   ``,
+	},
 	"invalid params from the beginning": {
 		params: "match[]=-not-a-valid-metric-name",
 		code:   400,
@@ -100,6 +105,25 @@ test_metric1{foo="boo"} 1 6000000
 test_metric2{foo="boo"} 1 6000000
 # TYPE test_metric_without_labels untyped
 test_metric_without_labels 1001 6000000
+`,
+	},
+	"empty label value matches everything that doesn't have that label": {
+		params: "match[]={foo='',__name__=~'.%2b'}",
+		code:   200,
+		body: `# TYPE test_metric_without_labels untyped
+test_metric_without_labels 1001 6000000
+`,
+	},
+	"empty label value for a label that doesn't exist at all, matches everything": {
+		params: "match[]={bar='',__name__=~'.%2b'}",
+		code:   200,
+		body: `# TYPE test_metric1 untyped
+test_metric1{foo="bar"} 10000 6000000
+test_metric1{foo="boo"} 1 6000000
+# TYPE test_metric2 untyped
+test_metric2{foo="boo"} 1 6000000
+# TYPE test_metric_without_labels untyped
+test_metric_without_labels 1001 6000000
 `,
 	},
 }