x/auth/simulation/genesis.go: add unit tests

x/auth/simulation/genesis_test.go

@@ -0,0 +1,72 @@
+package simulation_test
+
+import (
+	"encoding/json"
+	"math/rand"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/cosmos/cosmos-sdk/codec"
+	"github.com/cosmos/cosmos-sdk/types/module"
+	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
+	"github.com/cosmos/cosmos-sdk/x/auth/simulation"
+	"github.com/cosmos/cosmos-sdk/x/auth/types"
+)
+
+// TestRandomizedGenState tests the normal scenario of applying RandomizedGenState.
+// Abonormal scenarios are not tested here.
+func TestRandomizedGenState(t *testing.T) {
+	cdc := codec.New()
+	// Make sure to register cdc.
+	// otherwise the test will panic
+	types.RegisterCodec(cdc)
+
+	s := rand.NewSource(1)
+	r := rand.New(s)
+
+	simState := module.SimulationState{
+		AppParams:    make(simtypes.AppParams),
+		Cdc:          cdc,
+		Rand:         r,
+		NumBonded:    3,
+		Accounts:     simtypes.RandomAccounts(r, 3),
+		InitialStake: 1000,
+		GenState:     make(map[string]json.RawMessage),
+	}
+
+	simulation.RandomizedGenState(&simState)
+
+	var authGenesis types.GenesisState
+	simState.Cdc.MustUnmarshalJSON(simState.GenState[types.ModuleName], &authGenesis)
+
+	require.Equal(t, uint64(0x8c), authGenesis.Params.GetMaxMemoCharacters())
+	require.Equal(t, uint64(0x2b6), authGenesis.Params.GetSigVerifyCostED25519())
+	require.Equal(t, uint64(0x1ff), authGenesis.Params.GetSigVerifyCostSecp256k1())
+	require.Equal(t, uint64(9), authGenesis.Params.GetTxSigLimit())
+	require.Equal(t, uint64(5), authGenesis.Params.GetTxSizeCostPerByte())
+	require.Len(t, authGenesis.Accounts, 3)
+	require.Equal(t, "cosmos1ghekyjucln7y67ntx7cf27m9dpuxxemn4c8g4r", authGenesis.Accounts[2].GetAddress().String())
+	require.Equal(t, uint64(0), authGenesis.Accounts[2].GetAccountNumber())
+	require.Equal(t, uint64(0), authGenesis.Accounts[2].GetSequence())
+}
+
+// TestRandomizedGenState tests abnormal scenarios of applying RandomizedGenState.
+func TestRandomizedGenState1(t *testing.T) {
+	cdc := codec.New()
+
+	s := rand.NewSource(1)
+	r := rand.New(s)
+
+	simState := module.SimulationState{
+		AppParams:    make(simtypes.AppParams),
+		Cdc:          cdc,
+		Rand:         r,
+		NumBonded:    3,
+		Accounts:     simtypes.RandomAccounts(r, 3),
+		InitialStake: 1000,
+		GenState:     make(map[string]json.RawMessage),
+	}
+
+	require.Panicsf(t, func() { simulation.RandomizedGenState(&simState) }, "Unregistered interface types.GenesisAccount")
+}