test(evm): Add tests for feemarket wrapper

CHANGELOG.md

@@ -32,3 +32,4 @@ This changelog was created using the `clu` binary
 - (eip-712) [#13](https://github.com/evmos/os/pull/13) Add EIP-712 package.
 - (ci) [#12](https://github.com/evmos/os/pull/12) Add CI workflows, configurations, Makefile, License, etc.
 - (tests) [#65](https://github.com/evmos/os/pull/65) Add tests for bank wrapper in EVM module with mock.
+- (tests) [#66](https://github.com/evmos/os/pull/66) Add tests for feemarket wrapper in EVM module with mock.

x/evm/wrappers/feemarket.go

@@ -52,7 +52,9 @@ func (w FeeMarketWrapper) CalculateBaseFee(ctx sdk.Context) *big.Int {
 // GetParams returns the params with associated fees values converted to 18 decimals.
 func (w FeeMarketWrapper) GetParams(ctx sdk.Context) feemarkettypes.Params {
 	params := w.FeeMarketKeeper.GetParams(ctx)
-	params.BaseFee = types.ConvertAmountTo18DecimalsLegacy(params.BaseFee)
+	if !params.BaseFee.IsNil() {
+		params.BaseFee = types.ConvertAmountTo18DecimalsLegacy(params.BaseFee)
+	}
 	params.MinGasPrice = types.ConvertAmountTo18DecimalsLegacy(params.MinGasPrice)
 	return params
 }

x/evm/wrappers/feemarket_test.go

@@ -0,0 +1,269 @@
+package wrappers_test
+
+import (
+	"math/big"
+	"testing"
+
+	sdkmath "cosmossdk.io/math"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	evmtypes "github.com/evmos/os/x/evm/types"
+	"github.com/evmos/os/x/evm/wrappers"
+	"github.com/evmos/os/x/evm/wrappers/testutil"
+	feemarkettypes "github.com/evmos/os/x/feemarket/types"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/mock/gomock"
+)
+
+func TestGetBaseFee(t *testing.T) {
+	testCases := []struct {
+		name        string
+		evmDecimals uint8
+		expResult   *big.Int
+		mockSetup   func(*testutil.MockFeeMarketKeeper)
+	}{
+		{
+			name:        "success - does not convert 18 decimals",
+			evmDecimals: 18,
+			expResult:   big.NewInt(1e18), // 1 token in 18 decimals
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					GetBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDec(1e18))
+			},
+		},
+		{
+			name:        "success - convert 6 decimals to 18 decimals",
+			evmDecimals: 6,
+			expResult:   big.NewInt(1e18), // 1 token in 18 decimals
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					GetBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDec(1_000_000))
+			},
+		},
+		{
+			name:        "success - nil base fee",
+			evmDecimals: 6,
+			expResult:   nil,
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					GetBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyDec{})
+			},
+		},
+		{
+			name:        "success - small amount 18 decimals",
+			evmDecimals: 6,
+			expResult:   big.NewInt(1e12), // 0.000001 token in 18 decimals
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					GetBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDec(1))
+			},
+		},
+		{
+			name:        "success - base fee is zero",
+			evmDecimals: 6,
+			expResult:   big.NewInt(0),
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					GetBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDec(0))
+			},
+		},
+		{
+			name:        "success - truncate decimals with number less than 1",
+			evmDecimals: 6,
+			expResult:   big.NewInt(0), // 0.000001 token in 18 decimals
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					GetBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDecWithPrec(1, 13)) // multiplied by 1e12 is still less than 1
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Setup EVM configurator to have access to the EVM coin info.
+			configurator := evmtypes.NewEVMConfigurator()
+			configurator.ResetTestConfig()
+			err := configurator.WithEVMCoinInfo("token", tc.evmDecimals).Configure()
+			require.NoError(t, err, "failed to configure EVMConfigurator")
+
+			ctrl := gomock.NewController(t)
+			mockFeeMarketKeeper := testutil.NewMockFeeMarketKeeper(ctrl)
+			tc.mockSetup(mockFeeMarketKeeper)
+
+			feeMarketWrapper := wrappers.NewFeeMarketWrapper(mockFeeMarketKeeper)
+			result := feeMarketWrapper.GetBaseFee(sdk.Context{})
+
+			require.Equal(t, tc.expResult, result)
+		})
+	}
+}
+
+func TestCalculateBaseFee(t *testing.T) {
+	testCases := []struct {
+		name        string
+		evmDecimals uint8
+		baseFee     sdkmath.LegacyDec
+		expResult   *big.Int
+		mockSetup   func(*testutil.MockFeeMarketKeeper)
+	}{
+		{
+			name:        "success - does not convert 18 decimals",
+			evmDecimals: 18,
+			expResult:   big.NewInt(1e18), // 1 token in 18 decimals
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					CalculateBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDec(1e18))
+			},
+		},
+		{
+			name:        "success - convert 6 decimals to 18 decimals",
+			evmDecimals: 6,
+			expResult:   big.NewInt(1e18), // 1 token in 18 decimals
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					CalculateBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDec(1_000_000))
+			},
+		},
+		{
+			name:        "success - nil base fee",
+			evmDecimals: 6,
+			expResult:   nil,
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					CalculateBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyDec{})
+			},
+		},
+		{
+			name:        "success - small amount 18 decimals",
+			evmDecimals: 6,
+			expResult:   big.NewInt(1e12), // 0.000001 token in 18 decimals
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					CalculateBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDec(1))
+			},
+		},
+		{
+			name:        "success - base fee is zero",
+			evmDecimals: 6,
+			expResult:   big.NewInt(0),
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					CalculateBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDec(0))
+			},
+		},
+		{
+			name:        "success - truncate decimals with number less than 1",
+			evmDecimals: 6,
+			expResult:   big.NewInt(0), // 0.000001 token in 18 decimals
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					CalculateBaseFee(gomock.Any()).
+					Return(sdkmath.LegacyNewDecWithPrec(1, 13)) // multiplied by 1e12 is still less than 1
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Setup EVM configurator to have access to the EVM coin info.
+			configurator := evmtypes.NewEVMConfigurator()
+			configurator.ResetTestConfig()
+			err := configurator.WithEVMCoinInfo("token", tc.evmDecimals).Configure()
+			require.NoError(t, err, "failed to configure EVMConfigurator")
+
+			ctrl := gomock.NewController(t)
+			mockFeeMarketKeeper := testutil.NewMockFeeMarketKeeper(ctrl)
+			tc.mockSetup(mockFeeMarketKeeper)
+
+			feeMarketWrapper := wrappers.NewFeeMarketWrapper(mockFeeMarketKeeper)
+			result := feeMarketWrapper.CalculateBaseFee(sdk.Context{})
+
+			require.Equal(t, tc.expResult, result)
+		})
+	}
+}
+
+func TestGetParams(t *testing.T) {
+	testCases := []struct {
+		name        string
+		evmDecimals uint8
+		expParams   feemarkettypes.Params
+		mockSetup   func(*testutil.MockFeeMarketKeeper)
+	}{
+		{
+			name:        "success - convert 6 decimals to 18 decimals",
+			evmDecimals: 6,
+			expParams: feemarkettypes.Params{
+				BaseFee:     sdkmath.LegacyNewDec(1e18),
+				MinGasPrice: sdkmath.LegacyNewDec(1e18),
+			},
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					GetParams(gomock.Any()).
+					Return(feemarkettypes.Params{
+						BaseFee:     sdkmath.LegacyNewDec(1_000_000),
+						MinGasPrice: sdkmath.LegacyNewDec(1_000_000),
+					})
+			},
+		},
+		{
+			name:        "success - does not convert 18 decimals",
+			evmDecimals: 18,
+			expParams: feemarkettypes.Params{
+				BaseFee:     sdkmath.LegacyNewDec(1e18),
+				MinGasPrice: sdkmath.LegacyNewDec(1e18),
+			},
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					GetParams(gomock.Any()).
+					Return(feemarkettypes.Params{
+						BaseFee:     sdkmath.LegacyNewDec(1e18),
+						MinGasPrice: sdkmath.LegacyNewDec(1e18),
+					})
+			},
+		},
+		{
+			name:        "success - nil base fee",
+			evmDecimals: 18,
+			expParams: feemarkettypes.Params{
+				MinGasPrice: sdkmath.LegacyNewDec(1e18),
+			},
+			mockSetup: func(mfk *testutil.MockFeeMarketKeeper) {
+				mfk.EXPECT().
+					GetParams(gomock.Any()).
+					Return(feemarkettypes.Params{
+						MinGasPrice: sdkmath.LegacyNewDec(1e18),
+					})
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Setup EVM configurator to have access to the EVM coin info.
+			configurator := evmtypes.NewEVMConfigurator()
+			configurator.ResetTestConfig()
+			err := configurator.WithEVMCoinInfo("token", tc.evmDecimals).Configure()
+			require.NoError(t, err, "failed to configure EVMConfigurator")
+
+			ctrl := gomock.NewController(t)
+			mockFeeMarketKeeper := testutil.NewMockFeeMarketKeeper(ctrl)
+			tc.mockSetup(mockFeeMarketKeeper)
+
+			feeMarketWrapper := wrappers.NewFeeMarketWrapper(mockFeeMarketKeeper)
+			result := feeMarketWrapper.GetParams(sdk.Context{})
+
+			require.Equal(t, tc.expParams, result)
+		})
+	}
+}