improve test

Signed-off-by: Sylvia Lei <[email protected]>

dynamic_store_test.go

@@ -158,10 +158,7 @@ func Test_DynamicStore_fileStore_AllowPlainTextPut(t *testing.T) {
 	}
 
 	// test AllowPlainTextPut = true
-	ds, err = NewStore(configPath, StoreOptions{AllowPlaintextPut: true})
-	if err != nil {
-		t.Fatal("NewStore() error =", err)
-	}
+	ds.AllowPlaintextPut = true
 	if err := ds.Put(ctx, serverAddr, cred); err != nil {
 		t.Error("DynamicStore.Put() error =", err)
 	}

internal/config/config_test.go

@@ -1,3 +1,18 @@
+/*
+Copyright The ORAS Authors.
+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 config
 
 import "testing"