fix: delete SMTP correctly (#6391)

internal/query/projection/smtp.go

@@ -74,6 +74,10 @@ func (p *smtpConfigProjection) reducers() []handler.AggregateReducer {
 					Event:  instance.SMTPConfigPasswordChangedEventType,
 					Reduce: p.reduceSMTPConfigPasswordChanged,
 				},
+				{
+					Event:  instance.SMTPConfigRemovedEventType,
+					Reduce: p.reduceSMTPConfigRemoved,
+				},
 				{
 					Event:  instance.InstanceRemovedEventType,
 					Reduce: reduceInstanceRemovedHelper(SMTPConfigColumnInstanceID),
@@ -160,3 +164,17 @@ func (p *smtpConfigProjection) reduceSMTPConfigPasswordChanged(event eventstore.
 		},
 	), nil
 }
+
+func (p *smtpConfigProjection) reduceSMTPConfigRemoved(event eventstore.Event) (*handler.Statement, error) {
+	e, err := assertEvent[*instance.SMTPConfigRemovedEvent](event)
+	if err != nil {
+		return nil, err
+	}
+	return crdb.NewDeleteStatement(
+		e,
+		[]handler.Condition{
+			handler.NewCond(SMTPConfigColumnAggregateID, e.Aggregate().ID),
+			handler.NewCond(SMTPConfigColumnInstanceID, e.Aggregate().InstanceID),
+		},
+	), nil
+}

internal/query/projection/smtp_test.go

@@ -145,6 +145,33 @@ func TestSMTPConfigProjection_reduces(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "reduceSMTPConfigRemoved",
+			args: args{
+				event: getEvent(testEvent(
+					repository.EventType(instance.SMTPConfigRemovedEventType),
+					instance.AggregateType,
+					[]byte(`{}`),
+				), instance.SMTPConfigRemovedEventMapper),
+			},
+			reduce: (&smtpConfigProjection{}).reduceSMTPConfigRemoved,
+			want: wantReduce{
+				aggregateType:    eventstore.AggregateType("instance"),
+				sequence:         15,
+				previousSequence: 10,
+				executer: &testExecuter{
+					executions: []execution{
+						{
+							expectedStmt: "DELETE FROM projections.smtp_configs WHERE (aggregate_id = $1) AND (instance_id = $2)",
+							expectedArgs: []interface{}{
+								"agg-id",
+								"instance-id",
+							},
+						},
+					},
+				},
+			},
+		},
 		{
 			name: "instance reduceInstanceRemoved",
 			args: args{