Add min commission upgrade test

tests/e2e/e2e_upgrade_min_commission_test.go

@@ -0,0 +1,68 @@
+package e2e_test
+
+import (
+	sdkmath "cosmossdk.io/math"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/x/staking/types"
+
+	"github.com/kava-labs/kava/tests/util"
+)
+
+func (suite *IntegrationTestSuite) TestValMinCommission() {
+	suite.SkipIfUpgradeDisabled()
+
+	beforeUpgradeCtx := util.CtxAtHeight(suite.UpgradeHeight - 1)
+	afterUpgradeCtx := util.CtxAtHeight(suite.UpgradeHeight)
+
+	suite.Run("before upgrade", func() {
+		// Before params
+		beforeParams, err := suite.Kava.Staking.Params(beforeUpgradeCtx, &types.QueryParamsRequest{})
+		suite.Require().NoError(err)
+
+		suite.Require().Equal(
+			sdkmath.LegacyZeroDec().String(),
+			beforeParams.Params.MinCommissionRate.String(),
+			"min commission rate should be 0%% before upgrade",
+		)
+
+		// Before validators
+		beforeValidators, err := suite.Kava.Staking.Validators(beforeUpgradeCtx, &types.QueryValidatorsRequest{})
+		suite.Require().NoError(err)
+
+		for _, val := range beforeValidators.Validators {
+			expectedRate := sdkmath.LegacyMustNewDecFromStr("0.1")
+
+			suite.Require().Equalf(
+				expectedRate.String(),
+				val.Commission.CommissionRates.Rate.String(),
+				"validator %s should have commission rate of %s before upgrade",
+				val.OperatorAddress,
+				expectedRate,
+			)
+		}
+	})
+
+	suite.Run("after upgrade", func() {
+		// After params
+		afterParams, err := suite.Kava.Staking.Params(afterUpgradeCtx, &types.QueryParamsRequest{})
+		suite.Require().NoError(err)
+
+		suite.Require().Equal(
+			sdkmath.LegacyMustNewDecFromStr("0.05").String(),
+			afterParams.Params.MinCommissionRate.String(),
+			"min commission rate should be 5%% after upgrade",
+		)
+
+		// After validators
+		afterValidators, err := suite.Kava.Staking.Validators(afterUpgradeCtx, &types.QueryValidatorsRequest{})
+		suite.Require().NoError(err)
+
+		for _, val := range afterValidators.Validators {
+			suite.Require().Truef(
+				val.Commission.CommissionRates.Rate.GTE(sdk.MustNewDecFromStr("0.05")),
+				"validator %s should have commission rate of at least 5%%",
+				val.OperatorAddress,
+			)
+		}
+	})
+}