feat: instance remove (#4345)

* feat(instance): add remove instance event with projections cleanup

* fix(instance): corrected used id to clean up projections

* fix merge

* fix: correct unit test projection names

* fix: current sequence of lists and query for ensuring keypair based projections

Co-authored-by: Livio Spring <livio.a@gmail.com>
Co-authored-by: Fabi <38692350+hifabienne@users.noreply.github.com>

internal/query/projection/instance_domain_test.go

@@ -31,7 +31,6 @@ func TestInstanceDomainProjection_reduces(t *testing.T) {
 			},
 			reduce: (&instanceDomainProjection{}).reduceDomainAdded,
 			want: wantReduce{
-				projection:       InstanceDomainTable,
 				aggregateType:    eventstore.AggregateType("instance"),
 				sequence:         15,
 				previousSequence: 10,
@@ -64,7 +63,6 @@ func TestInstanceDomainProjection_reduces(t *testing.T) {
 			},
 			reduce: (&instanceDomainProjection{}).reduceDomainRemoved,
 			want: wantReduce{
-				projection:       InstanceDomainTable,
 				aggregateType:    eventstore.AggregateType("instance"),
 				sequence:         15,
 				previousSequence: 10,
@@ -81,6 +79,32 @@ func TestInstanceDomainProjection_reduces(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "instance.reduceInstanceRemoved",
+			args: args{
+				event: getEvent(testEvent(
+					repository.EventType(instance.InstanceRemovedEventType),
+					instance.AggregateType,
+					[]byte(`{"name": "Name"}`),
+				), instance.InstanceRemovedEventMapper),
+			},
+			reduce: reduceInstanceRemovedHelper(InstanceDomainInstanceIDCol),
+			want: wantReduce{
+				aggregateType:    eventstore.AggregateType("instance"),
+				sequence:         15,
+				previousSequence: 10,
+				executer: &testExecuter{
+					executions: []execution{
+						{
+							expectedStmt: "DELETE FROM projections.instance_domains WHERE (instance_id = $1)",
+							expectedArgs: []interface{}{
+								"agg-id",
+							},
+						},
+					},
+				},
+			},
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
@@ -92,7 +116,7 @@ func TestInstanceDomainProjection_reduces(t *testing.T) {
 
 			event = tt.args.event(t)
 			got, err = tt.reduce(event)
-			assertReduce(t, got, err, tt.want)
+			assertReduce(t, got, err, InstanceDomainTable, tt.want)
 		})
 	}
 }