istio.io/istio@v0.0.0-20240520182934-d79c90f27776/istioctl/pkg/writer/compare/comparator_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 compare
    16  
    17  import (
    18  	"bytes"
    19  	"os"
    20  	"testing"
    21  )
    22  
    23  // TestComparatorMatchingConfigs tests the scenario where Istiod and Envoy configurations match
    24  func TestComparatorMatchingSameConfigs(t *testing.T) {
    25  	cfg, err := os.ReadFile("testdata/configdump.json")
    26  	if err != nil {
    27  		t.Fatalf("Failed to read test data: %v", err)
    28  	}
    29  
    30  	var outputBuffer bytes.Buffer
    31  	comparator, err := NewComparator(&outputBuffer, map[string][]byte{"default": cfg}, cfg)
    32  	if err != nil {
    33  		t.Fatalf("Failed to create Comparator: %v", err)
    34  	}
    35  	err = comparator.Diff()
    36  	if err != nil {
    37  		t.Errorf("Unexpected error during diff: %v", err)
    38  	}
    39  
    40  	expected := []string{"Clusters Match", "Listeners Match", "Routes Match"}
    41  	for _, exp := range expected {
    42  		if !bytes.Contains(outputBuffer.Bytes(), []byte(exp)) {
    43  			t.Errorf("Expected %s, but it was not found", exp)
    44  		}
    45  	}
    46  }
    47  
    48  // TestComparatorMismatchedConfigs tests the scenario where Istiod and Envoy configurations do not match
    49  func TestComparatorMismatchedConfigs(t *testing.T) {
    50  	cfg, err := os.ReadFile("testdata/configdump.json")
    51  	if err != nil {
    52  		t.Fatalf("Failed to read test data: %v", err)
    53  	}
    54  	diffCfg, err := os.ReadFile("testdata/configdump_diff.json")
    55  	if err != nil {
    56  		t.Fatalf("Failed to read test data: %v", err)
    57  	}
    58  
    59  	var outputBuffer bytes.Buffer
    60  	comparator, err := NewComparator(&outputBuffer, map[string][]byte{"default": cfg}, diffCfg)
    61  	if err != nil {
    62  		t.Fatalf("Failed to create Comparator: %v", err)
    63  	}
    64  	err = comparator.Diff()
    65  	if err != nil {
    66  		t.Errorf("Unexpected error during diff: %v", err)
    67  	}
    68  
    69  	expectedNotMatch := []string{"Clusters Don't Match", "Listeners Don't Match", "Routes Don't Match"}
    70  	for _, exp := range expectedNotMatch {
    71  		if !bytes.Contains(outputBuffer.Bytes(), []byte(exp)) {
    72  			t.Errorf("Expected %s, but it was not found", exp)
    73  		}
    74  	}
    75  }