1 files changed, 32 insertions, 0 deletions
diff --git a/middleware/kubernetes/subzone_test.go b/middleware/kubernetes/subzone_test.go
new file mode 100644
index 000000000..c48e66c12
--- /dev/null
+++ b/middleware/kubernetes/subzone_test.go
@@ -0,0 +1,32 @@
+package kubernetes
+
+import (
+	"testing"
+)
+
+// List of configured zones to test against
+var confZones = []string{
+	"a.b.c",
+	"d",
+}
+
+// Map of zonename :: expected boolean result
+var examplesSubzoneConflict = map[string]bool{
+	"a.b.c":   true,  // conflicts with zone "a.b.c"
+	"b.c":     true,  // conflicts with zone "a.b.c"
+	"c":       true,  // conflicts with zone "a.b.c"
+	"e":       false, // no conflict
+	"a.b.c.e": false, // no conflict
+	"a.b.c.d": true,  // conflicts with zone "d"
+	"":        false,
+}
+
+func TestsubzoneConflict(t *testing.T) {
+	for z, expected := range examplesSubzoneConflict {
+		actual, conflicts := subzoneConflict(confZones, z)
+
+		if actual != expected {
+			t.Errorf("Expected conflict result '%v' for example '%v'. Instead got '%v'. Conflicting zones are: %v", expected, z, actual, conflicts)
+		}
+	}
+}