github.com/nats-io/nats-server/v2@v2.11.0-preview.2/server/rate_counter_test.go (about)

     1  // Copyright 2021-2022 The NATS Authors
     2  // Licensed under the Apache License, Version 2.0 (the "License");
     3  // you may not use this file except in compliance with the License.
     4  // You may obtain a copy of the License at
     5  //
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package server
    15  
    16  import (
    17  	"testing"
    18  	"time"
    19  )
    20  
    21  func TestRateCounter(t *testing.T) {
    22  	counter := newRateCounter(10)
    23  	counter.interval = 100 * time.Millisecond
    24  
    25  	var i int
    26  	for i = 0; i < 10; i++ {
    27  		if !counter.allow() {
    28  			t.Errorf("counter should allow (iteration %d)", i)
    29  		}
    30  	}
    31  	for i = 0; i < 5; i++ {
    32  		if counter.allow() {
    33  			t.Errorf("counter should not allow (iteration %d)", i)
    34  		}
    35  	}
    36  
    37  	blocked := counter.countBlocked()
    38  	if blocked != 5 {
    39  		t.Errorf("Expected blocked = 5, got %d", blocked)
    40  	}
    41  
    42  	blocked = counter.countBlocked()
    43  	if blocked != 0 {
    44  		t.Errorf("Expected blocked = 0, got %d", blocked)
    45  	}
    46  
    47  	time.Sleep(150 * time.Millisecond)
    48  
    49  	if !counter.allow() {
    50  		t.Errorf("Expected true after current time window expired")
    51  	}
    52  }