istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pkg/kube/krt/recomputetrigger_test.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package krt_test
    16  
    17  import (
    18  	"testing"
    19  
    20  	"istio.io/istio/pkg/kube/krt"
    21  	"istio.io/istio/pkg/ptr"
    22  	"istio.io/istio/pkg/test/util/assert"
    23  )
    24  
    25  func TestRecomputeTrigger(t *testing.T) {
    26  	rt := krt.NewRecomputeTrigger()
    27  	col1 := krt.NewStatic(ptr.Of("foo")).AsCollection()
    28  	response := "foo"
    29  	col2 := krt.NewCollection(col1, func(ctx krt.HandlerContext, i string) *string {
    30  		rt.MarkDependant(ctx)
    31  		return ptr.Of(response)
    32  	})
    33  	tt := assert.NewTracker[string](t)
    34  	col2.Register(TrackerHandler[string](tt))
    35  	tt.WaitOrdered("add/foo")
    36  
    37  	response = "bar"
    38  	rt.TriggerRecomputation()
    39  	tt.WaitUnordered("delete/foo", "add/bar")
    40  
    41  	response = "baz"
    42  	rt.TriggerRecomputation()
    43  	tt.WaitUnordered("delete/bar", "add/baz")
    44  }