[FAB-1564] Create policies mock infrastructure

https://jira.hyperledger.org/browse/FAB-1564

This is the first in a series of three patch sets to add broadcast
filtering by signature, this one introduces the mock testing
infrastructure that will be necessary to test the signature filter.

Change-Id: Ifb5e37b43117c21ae6df47241d618b61c1c33b7e
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

orderer/mocks/policies/policies.go

@@ -0,0 +1,43 @@
+/*
+Copyright IBM Corp. 2016 All Rights Reserved.
+
+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 policies
+
+import (
+	"github.com/hyperledger/fabric/common/policies"
+	cb "github.com/hyperledger/fabric/protos/common"
+)
+
+// Policy is a mock implementation of the policies.Policy interface
+type Policy struct {
+	Err error
+}
+
+// Evaluate returns the Err set in Policy
+func (p *Policy) Evaluate(signatureSet []*cb.SignedData) error {
+	return p.Err
+}
+
+// Manager is a mock implementation of the policies.Manager interface
+type Manager struct {
+	// Policy is returned as the output to GetPolicy
+	Policy *Policy
+}
+
+// GetPolicy returns the value of Manager.Policy and whether it was nil or not
+func (m *Manager) GetPolicy(id string) (policies.Policy, bool) {
+	return m.Policy, m.Policy != nil
+}

orderer/mocks/policies/policies_test.go

@@ -0,0 +1,31 @@
+/*
+Copyright IBM Corp. 2016 All Rights Reserved.
+
+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 policies
+
+import (
+	"testing"
+
+	"github.com/hyperledger/fabric/common/policies"
+)
+
+func TestPolicyManagerInterface(t *testing.T) {
+	_ = policies.Manager(&Manager{})
+}
+
+func TestPolicyInterface(t *testing.T) {
+	_ = policies.Policy(&Policy{})
+}