Add singleton test for data residency to work around the covery probl…

…em, rename config-data-residency.yaml to make it consistent with other files

pkg/apis/configs/dataresidency/dataresidency_defaults_test.go

@@ -153,7 +153,7 @@ func TestNewDefaultsConfigFromConfigMapEmpty(t *testing.T) {
 		t.Run(n, func(t *testing.T) {
 			_, err := NewDefaultsConfigFromConfigMap(tc.config)
 			if err != nil {
-				t.Fatalf("Empty value or no key should pass")
+				t.Errorf("Empty value or no key should pass")
 			}
 		})
 	}

pkg/apis/configs/dataresidency/singleton_test.go

@@ -0,0 +1,44 @@
+/*
+Copyright 2020 Google LLC.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package dataresidency
+
+import (
+	"context"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	. "knative.dev/pkg/configmap"
+	. "knative.dev/pkg/configmap/testing"
+)
+
+func TestStoreSingletonLoadWithContext(t *testing.T) {
+	ctx := context.Background()
+
+	storeSingleton := &StoreSingleton{}
+
+	_, defaultsConfig := ConfigMapsFromTestFile(t, configName, defaulterKey)
+	cmw := NewStaticWatcher(defaultsConfig)
+
+	store := storeSingleton.Store(ctx, cmw)
+
+	t.Run("defaults", func(t *testing.T) {
+		expected, _ := NewDefaultsConfigFromConfigMap(defaultsConfig)
+		if diff := cmp.Diff(expected, store.Load().DataResidencyDefaults); diff != "" {
+			t.Fatalf("Unexpected defaults config (-want, +got): %v", diff)
+		}
+	})
+}