unit test for sinlge-page resource (volumes)
diff --git a/openstack/blockstorage/v1/volumes/requests_test.go b/openstack/blockstorage/v1/volumes/requests_test.go
index 7643375..c484cf0 100644
--- a/openstack/blockstorage/v1/volumes/requests_test.go
+++ b/openstack/blockstorage/v1/volumes/requests_test.go
@@ -45,6 +45,32 @@
 	}
 }
 
+func TestListAll(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+
+	MockListResponse(t)
+
+	allPages, err := List(client.ServiceClient(), &ListOpts{}).AllPages()
+	th.AssertNoErr(t, err)
+	actual, err := ExtractVolumes(allPages)
+	th.AssertNoErr(t, err)
+
+	expected := []Volume{
+		Volume{
+			ID:   "289da7f8-6440-407c-9fb4-7db01ec49164",
+			Name: "vol-001",
+		},
+		Volume{
+			ID:   "96c3bda7-c82a-4f50-be73-ca7621794835",
+			Name: "vol-002",
+		},
+	}
+
+	th.CheckDeepEquals(t, expected, actual)
+
+}
+
 func TestGet(t *testing.T) {
 	th.SetupHTTP()
 	defer th.TeardownHTTP()