test(evmengine): add test cases for params (#136)

increased coverage to 77.3%

client/x/evmengine/keeper/params_internal_test.go

@@ -0,0 +1,48 @@
+package keeper
+
+import (
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/stretchr/testify/require"
+
+	"github.com/piplabs/story/client/x/evmengine/types"
+)
+
+func TestKeeper_ExecutionBlockHash(t *testing.T) {
+	t.Parallel()
+	ctx, keeper := createTestKeeper(t)
+
+	// check existing execution block hash
+	execHash, err := keeper.ExecutionBlockHash(ctx)
+	require.NoError(t, err)
+	require.Nil(t, execHash, "execution block hash should be nil because it is not set yet")
+
+	// set execution block hash
+	dummyHash := common.HexToHash("0x047e24c3455107d87c68dffa307b3b7fa1877f3e9d7f30c7ee359f2eff3a75d9")
+	require.NoError(t, keeper.SetParams(ctx, types.Params{ExecutionBlockHash: dummyHash.Bytes()}))
+
+	// check execution block hash whether it is set correctly
+	execHash, err = keeper.ExecutionBlockHash(ctx)
+	require.NoError(t, err)
+	require.Equal(t, dummyHash.Bytes(), execHash, "execution block hash should be equal to the dummy hash")
+}
+
+func TestKeeper_GetSetParams(t *testing.T) {
+	t.Parallel()
+	ctx, keeper := createTestKeeper(t)
+
+	// check existing params
+	params, err := keeper.GetParams(ctx)
+	require.NoError(t, err)
+	require.Equal(t, types.DefaultParams(), params, "params should be equal to the default params")
+
+	// set execution block hash
+	dummyHash := common.HexToHash("0x047e24c3455107d87c68dffa307b3b7fa1877f3e9d7f30c7ee359f2eff3a75d9")
+	require.NoError(t, keeper.SetParams(ctx, types.Params{ExecutionBlockHash: dummyHash.Bytes()}))
+
+	// check params whether it is set correctly
+	params, err = keeper.GetParams(ctx)
+	require.NoError(t, err)
+	require.Equal(t, types.Params{ExecutionBlockHash: dummyHash.Bytes()}, params)
+}