istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pkg/test/framework/components/echo/util/traffic/result.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 traffic
    16  
    17  import (
    18  	"bytes"
    19  	"fmt"
    20  
    21  	"github.com/hashicorp/go-multierror"
    22  
    23  	"istio.io/istio/pkg/test"
    24  	"istio.io/istio/pkg/test/framework/components/echo"
    25  )
    26  
    27  // Result of a traffic generation operation.
    28  type Result struct {
    29  	TotalRequests      int
    30  	SuccessfulRequests int
    31  	Error              error
    32  }
    33  
    34  func (r Result) String() string {
    35  	buf := &bytes.Buffer{}
    36  
    37  	_, _ = fmt.Fprintf(buf, "TotalRequests:       %d\n", r.TotalRequests)
    38  	_, _ = fmt.Fprintf(buf, "SuccessfulRequests:  %d\n", r.SuccessfulRequests)
    39  	_, _ = fmt.Fprintf(buf, "PercentSuccess:      %f\n", r.PercentSuccess())
    40  	_, _ = fmt.Fprintf(buf, "Errors:              %v\n", r.Error)
    41  
    42  	return buf.String()
    43  }
    44  
    45  func (r *Result) add(result echo.CallResult, err error) {
    46  	count := result.Responses.Len()
    47  	if count == 0 {
    48  		count = 1
    49  	}
    50  
    51  	r.TotalRequests += count
    52  	if err != nil {
    53  		r.Error = multierror.Append(r.Error, fmt.Errorf("request %d: %v", r.TotalRequests, err))
    54  	} else {
    55  		r.SuccessfulRequests += count
    56  	}
    57  }
    58  
    59  func (r Result) PercentSuccess() float64 {
    60  	return float64(r.SuccessfulRequests) / float64(r.TotalRequests)
    61  }
    62  
    63  // CheckSuccessRate asserts that a minimum success threshold was met.
    64  func (r Result) CheckSuccessRate(t test.Failer, minimumPercent float64) {
    65  	if r.PercentSuccess() < minimumPercent {
    66  		t.Fatalf("Minimum success threshold, %f, was not met. %d/%d (%f) requests failed: %v",
    67  			minimumPercent, r.SuccessfulRequests, r.TotalRequests, r.PercentSuccess(), r.Error)
    68  	}
    69  	if r.SuccessfulRequests == r.TotalRequests {
    70  		t.Log("traffic checker succeeded with all successful requests")
    71  	} else {
    72  		t.Logf("traffic checker met minimum threshold, with %d/%d successes, but encountered some failures: %v", r.SuccessfulRequests, r.TotalRequests, r.Error)
    73  	}
    74  }