[FAB-13769] Add UT code to ABAC sample Chaincode

This CR adds unit test code to the ABAC sample Chaincode to show
how to use MockStub for Chaincode that uses the `cid` package.
To test the access control in Chaincode method, Creator field in
MockStub is set by reading mspID and certificate with attributes.

FAB-13769 #done

Change-Id: Iddc5ea105b25afcc18b8ff54cf359d2b9406e829
Signed-off-by: Yuki Kondo <yuki.kondo@hal.hitachi.com>

chaincode/abac/go/abac_test.go

@@ -0,0 +1,141 @@
+/*
+Copyright Hitachi America Ltd. All Rights Reserved.
+
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package main
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/hyperledger/fabric/protos/msp"
+	"github.com/hyperledger/fabric/core/chaincode/shim"
+)
+
+// Cert with attribute. "abac.init":"true"
+const certWithAttrs = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+`
+
+func checkInit(t *testing.T, stub *shim.MockStub, args [][]byte) {
+	res := stub.MockInit("1", args)
+	if res.Status != shim.OK {
+		fmt.Println("Init failed", string(res.Message))
+		t.FailNow()
+	}
+}
+
+func checkState(t *testing.T, stub *shim.MockStub, name string, value string) {
+	bytes := stub.State[name]
+	if bytes == nil {
+		fmt.Println("State", name, "failed to get value")
+		t.FailNow()
+	}
+	if string(bytes) != value {
+		fmt.Println("State value", name, "was not", value, "as expected")
+		t.FailNow()
+	}
+}
+
+func checkQuery(t *testing.T, stub *shim.MockStub, name string, value string) {
+	res := stub.MockInvoke("1", [][]byte{[]byte("query"), []byte(name)})
+	if res.Status != shim.OK {
+		fmt.Println("Query", name, "failed", string(res.Message))
+		t.FailNow()
+	}
+	if res.Payload == nil {
+		fmt.Println("Query", name, "failed to get value")
+		t.FailNow()
+	}
+	if string(res.Payload) != value {
+		fmt.Println("Query value", name, "was not", value, "as expected")
+		t.FailNow()
+	}
+}
+
+func checkInvoke(t *testing.T, stub *shim.MockStub, args [][]byte) {
+	res := stub.MockInvoke("1", args)
+	if res.Status != shim.OK {
+		fmt.Println("Invoke", args, "failed", string(res.Message))
+		t.FailNow()
+	}
+}
+
+func setCreator(t *testing.T, stub *shim.MockStub, mspID string, idbytes []byte) {
+	sid := &msp.SerializedIdentity{Mspid: mspID, IdBytes: idbytes}
+	b, err := proto.Marshal(sid)
+	if err != nil {
+		t.FailNow()
+	}
+	stub.Creator = b
+}
+
+func TestAbac_Init(t *testing.T) {
+	scc := new(SimpleChaincode)
+	stub := shim.NewMockStub("abac", scc)
+
+	setCreator(t, stub, "org1MSP", []byte(certWithAttrs))
+
+	// Init A=123 B=234
+	checkInit(t, stub, [][]byte{[]byte("init"), []byte("A"), []byte("123"), []byte("B"), []byte("234")})
+
+	checkState(t, stub, "A", "123")
+	checkState(t, stub, "B", "234")
+}
+
+func TestAbac_Query(t *testing.T) {
+	scc := new(SimpleChaincode)
+	stub := shim.NewMockStub("abac", scc)
+
+	setCreator(t, stub, "org1MSP", []byte(certWithAttrs))
+
+	// Init A=345 B=456
+	checkInit(t, stub, [][]byte{[]byte("init"), []byte("A"), []byte("345"), []byte("B"), []byte("456")})
+
+	// Query A
+	checkQuery(t, stub, "A", "345")
+
+	// Query B
+	checkQuery(t, stub, "B", "456")
+}
+
+func TestAbac_Invoke(t *testing.T) {
+	scc := new(SimpleChaincode)
+	stub := shim.NewMockStub("abac", scc)
+
+	setCreator(t, stub, "org1MSP", []byte(certWithAttrs))
+
+	// Init A=567 B=678
+	checkInit(t, stub, [][]byte{[]byte("init"), []byte("A"), []byte("567"), []byte("B"), []byte("678")})
+
+	// Invoke A->B for 123
+	checkInvoke(t, stub, [][]byte{[]byte("invoke"), []byte("A"), []byte("B"), []byte("123")})
+	checkQuery(t, stub, "A", "444")
+	checkQuery(t, stub, "B", "801")
+
+	// Invoke B->A for 234
+	checkInvoke(t, stub, [][]byte{[]byte("invoke"), []byte("B"), []byte("A"), []byte("234")})
+	checkQuery(t, stub, "A", "678")
+	checkQuery(t, stub, "B", "567")
+	checkQuery(t, stub, "A", "678")
+	checkQuery(t, stub, "B", "567")
+}