istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pkg/test/json.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 test
    16  
    17  import (
    18  	"bytes"
    19  	"encoding/json"
    20  )
    21  
    22  // JSONEquals compares two json strings. We cannot compare JSON strings from protobuf because of
    23  // design decisions https://github.com/golang/protobuf/issues/1373 Instead, use this function to
    24  // normalize the formatting
    25  func JSONEquals(t Failer, a, b string) {
    26  	t.Helper()
    27  	ba := bytes.Buffer{}
    28  	if err := json.Compact(&ba, []byte(a)); err != nil {
    29  		t.Fatal(err)
    30  	}
    31  	bb := bytes.Buffer{}
    32  	if err := json.Compact(&bb, []byte(b)); err != nil {
    33  		t.Fatal(err)
    34  	}
    35  	if ba.String() != bb.String() {
    36  		t.Fatalf("got %v, want %v", ba.String(), bb.String())
    37  	}
    38  }