Added headers

Author: lszinv

test/metrics/spanner-metrics-exporter.test.ts

@@ -1,10 +1,20 @@
+// Copyright 2025 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
+//
+//     https://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.
+
 import * as assert from 'assert';
 import * as sinon from 'sinon';
-import {
-  MeterProvider,
-  MetricReader,
-  ResourceMetrics,
-} from '@opentelemetry/sdk-metrics';
+import {MeterProvider, MetricReader} from '@opentelemetry/sdk-metrics';
 import {CloudMonitoringMetricsExporter} from '../../src/metrics/spanner-metrics-exporter';
 import {
   GAX_METER_NAME,

test/metrics/transform.test.ts

@@ -1,3 +1,17 @@
+// Copyright 2025 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
+//
+//     https://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.
+
 import * as assert from 'assert';
 import {_TEST_ONLY} from '../../src/metrics/transform';
 import {