imp: event assertion tests function

CHANGELOG.md

@@ -118,6 +118,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (core/24-host) [\#2820](https://github.com/cosmos/ibc-go/pull/2820) Add `MustParseClientStatePath` which parses the clientID from a client state key path. 
 * (apps/27-interchain-accounts) [\#2147](https://github.com/cosmos/ibc-go/pull/2147) Adding a `SubmitTx` gRPC endpoint for the ICS27 Controller module which allows owners of interchain accounts to submit transactions. This replaces the previously existing need for authentication modules to implement this standard functionality.
 * (testing/simapp) [\#2190](https://github.com/cosmos/ibc-go/pull/2190) Adding the new `x/group` cosmos-sdk module to simapp.
+* (testing) [\#2829](https://github.com/cosmos/ibc-go/pull/2829) Add `AssertEvents` which asserts events against expected event map.
 
 ### Bug Fixes
 

modules/apps/transfer/keeper/msg_server_test.go

@@ -3,6 +3,7 @@ package keeper_test
 import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
+	ibctesting "github.com/cosmos/ibc-go/v6/testing"
 
 	"github.com/cosmos/ibc-go/v6/modules/apps/transfer/types"
 )
@@ -38,7 +39,10 @@ func (suite *KeeperTestSuite) assertTransferEvents(
 }
 
 func (suite *KeeperTestSuite) TestMsgTransfer() {
-	var msg *types.MsgTransfer
+	var (
+		msg       *types.MsgTransfer
+		hasEvents bool
+	)
 
 	testCases := []struct {
 		name     string
@@ -47,12 +51,15 @@ func (suite *KeeperTestSuite) TestMsgTransfer() {
 	}{
 		{
 			"success",
-			func() {},
+			func() {
+				hasEvents = true
+			},
 			true,
 		},
 		{
 			"bank send enabled for denom",
 			func() {
+				hasEvents = true
 				suite.chainA.GetSimApp().BankKeeper.SetParams(suite.chainA.GetContext(),
 					banktypes.Params{
 						SendEnabled: []*banktypes.SendEnabled{{Denom: sdk.DefaultBondDenom, Enabled: true}},
@@ -109,6 +116,7 @@ func (suite *KeeperTestSuite) TestMsgTransfer() {
 	for _, tc := range testCases {
 		suite.Run(tc.name, func() {
 			suite.SetupTest()
+			hasEvents = false // must be explicitly set
 
 			path := NewTransferPath(suite.chainA, suite.chainB)
 			suite.coordinator.Setup(path)
@@ -131,14 +139,26 @@ func (suite *KeeperTestSuite) TestMsgTransfer() {
 				suite.Require().NoError(err)
 				suite.Require().NotNil(res)
 				suite.Require().NotEqual(res.Sequence, uint64(0))
-
-				events := ctx.EventManager().Events()
-				suite.assertTransferEvents(events, coin, "memo")
 			} else {
 				suite.Require().Error(err)
 				suite.Require().Nil(res)
+			}
 
-				events := ctx.EventManager().Events()
+			// Verify events
+			events := ctx.EventManager().Events()
+			expEvents := map[string]map[string]string{
+				"ibc_transfer": {
+					"sender":   suite.chainA.SenderAccount.GetAddress().String(),
+					"receiver": suite.chainB.SenderAccount.GetAddress().String(),
+					"amount":   coin.Amount.String(),
+					"denom":    coin.Denom,
+					"memo":     "memo",
+				},
+			}
+
+			if hasEvents {
+				ibctesting.AssertEvents(&suite.Suite, expEvents, events)
+			} else {
 				suite.Require().Len(events, 0)
 			}
 		})

testing/events.go

@@ -5,6 +5,7 @@ import (
 	"strconv"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/stretchr/testify/suite"
 
 	clienttypes "github.com/cosmos/ibc-go/v6/modules/core/02-client/types"
 	connectiontypes "github.com/cosmos/ibc-go/v6/modules/core/03-connection/types"
@@ -129,3 +130,33 @@ func ParseAckFromEvents(events sdk.Events) ([]byte, error) {
 	}
 	return nil, fmt.Errorf("acknowledgement event attribute not found")
 }
+
+// AssertEvents asserts that expected events are present in the actual events
+// expected map needs to be a subset of actual events to pass
+func AssertEvents(
+	suite *suite.Suite,
+	expected map[string]map[string]string,
+	actual sdk.Events,
+) {
+	hasEvents := make(map[string]bool)
+	for eventType := range expected {
+		hasEvents[eventType] = false
+	}
+
+	for _, event := range actual {
+		expEvent, eventFound := expected[event.Type]
+		if eventFound {
+			hasEvents[event.Type] = true
+			suite.Require().Len(event.Attributes, len(expEvent))
+			for _, attr := range event.Attributes {
+				expValue, found := expEvent[string(attr.Key)]
+				suite.Require().True(found)
+				suite.Require().Equal(expValue, string(attr.Value))
+			}
+		}
+	}
+
+	for eventName, hasEvent := range hasEvents {
+		suite.Require().True(hasEvent, "event: %s was not found in events", eventName)
+	}
+}