Add UT for nodeconfig.ShardIDFromConsensusKey

Use mainnet/devnet/testnet setup and ensure that the right chain
parameters are polled/used; verify the "pubKey % numShards" logic.

internal/configs/node/config_test.go

@@ -1,7 +1,14 @@
 package nodeconfig
 
 import (
+	"math/big"
 	"testing"
+
+	"github.com/golang/mock/gomock"
+	"github.com/harmony-one/bls/ffi/go/bls"
+
+	mock_shardingconfig "github.com/harmony-one/harmony/internal/configs/sharding/mock"
+	"github.com/harmony-one/harmony/internal/params"
 )
 
 func TestNodeConfigSingleton(t *testing.T) {
@@ -47,3 +54,79 @@ func TestNodeConfigMultiple(t *testing.T) {
 		t.Errorf("expecting false, got: %v", e.IsClient())
 	}
 }
+
+func blsPubKeyFromHex(hex string) *bls.PublicKey {
+	var k bls.PublicKey
+	if err := k.DeserializeHexStr(hex); err != nil {
+		panic(err)
+	}
+	return &k
+}
+
+func TestConfigType_ShardIDFromConsensusKey(t *testing.T) {
+	type fields struct {
+		ConsensusPubKey *bls.PublicKey
+		networkType     NetworkType
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		epoch  *big.Int
+		shards uint32
+		want   uint32
+	}{
+		{
+			"Mainnet",
+			fields{
+				blsPubKeyFromHex("ca23704be46ce9c4704681ac9c08ddc644f1858a5c28ce236e1b5d9dee67c1f5a28075b5ef089adeffa8a372c1762007"),
+				"mainnet",
+			},
+			params.MainnetChainConfig.StakingEpoch,
+			4,
+			3,
+		},
+		{
+			"Testnet",
+			fields{
+				blsPubKeyFromHex("e7f54994bc5c02edeeb178ce2d34db276a893bab5c59ac3d7eb9f077c893f9e31171de6236ba0e21be415d8631e45b91"),
+				"testnet",
+			},
+			params.TestnetChainConfig.StakingEpoch,
+			3,
+			1,
+		},
+		{
+			"Devnet",
+			fields{
+				blsPubKeyFromHex("e7f54994bc5c02edeeb178ce2d34db276a893bab5c59ac3d7eb9f077c893f9e31171de6236ba0e21be415d8631e45b91"),
+				"devnet",
+			},
+			params.TestnetChainConfig.StakingEpoch,
+			2,
+			1,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			mc := gomock.NewController(t)
+			defer mc.Finish()
+			instance := mock_shardingconfig.NewMockInstance(mc)
+			instance.EXPECT().NumShards().Return(tt.shards)
+			schedule := mock_shardingconfig.NewMockSchedule(mc)
+			schedule.EXPECT().InstanceForEpoch(tt.epoch).Return(instance)
+			conf := &ConfigType{
+				ConsensusPubKey:  tt.fields.ConsensusPubKey,
+				networkType:      tt.fields.networkType,
+				shardingSchedule: schedule,
+			}
+			got, err := conf.ShardIDFromConsensusKey()
+			if err != nil {
+				t.Errorf("ShardIDFromConsensusKey() error = %v", err)
+				return
+			}
+			if got != tt.want {
+				t.Errorf("ShardIDFromConsensusKey() got = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}