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| 1 | +package httprateredis_test |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "math/rand" |
| 6 | + "testing" |
| 7 | + "time" |
| 8 | + |
| 9 | + httprateredis "github.com/go-chi/httprate-redis" |
| 10 | + "golang.org/x/sync/errgroup" |
| 11 | +) |
| 12 | + |
| 13 | +func TestRedisCounter(t *testing.T) { |
| 14 | + limitCounter, err := httprateredis.NewRedisLimitCounter(&httprateredis.Config{ |
| 15 | + Host: "localhost", |
| 16 | + Port: 6379, |
| 17 | + MaxIdle: 500, |
| 18 | + MaxActive: 500, |
| 19 | + DBIndex: 0, |
| 20 | + ClientName: "httprateredis_test", |
| 21 | + PrefixKey: fmt.Sprintf("httprate:test:%v", rand.Int31n(100000)), // Unique key for each test |
| 22 | + }) |
| 23 | + if err != nil { |
| 24 | + t.Fatalf("redis not available: %v", err) |
| 25 | + } |
| 26 | + |
| 27 | + limitCounter.Config(1000, time.Minute) |
| 28 | + |
| 29 | + currentWindow := time.Now().UTC().Truncate(time.Minute) |
| 30 | + previousWindow := currentWindow.Add(-time.Minute) |
| 31 | + |
| 32 | + type test struct { |
| 33 | + name string // In each test do the following: |
| 34 | + advanceTime time.Duration // 1. advance time |
| 35 | + incrBy int // 2. increase counter |
| 36 | + prev int // 3. check previous window counter |
| 37 | + curr int // and current window counter |
| 38 | + } |
| 39 | + |
| 40 | + tests := []test{ |
| 41 | + { |
| 42 | + name: "t=0m: init", |
| 43 | + prev: 0, |
| 44 | + curr: 0, |
| 45 | + }, |
| 46 | + { |
| 47 | + name: "t=0m: increment 1", |
| 48 | + incrBy: 1, |
| 49 | + prev: 0, |
| 50 | + curr: 1, |
| 51 | + }, |
| 52 | + { |
| 53 | + name: "t=0m: increment by 99", |
| 54 | + incrBy: 99, |
| 55 | + prev: 0, |
| 56 | + curr: 100, |
| 57 | + }, |
| 58 | + { |
| 59 | + name: "t=1m: move clock by 1m", |
| 60 | + advanceTime: time.Minute, |
| 61 | + prev: 100, |
| 62 | + curr: 0, |
| 63 | + }, |
| 64 | + { |
| 65 | + name: "t=1m: increment by 20", |
| 66 | + incrBy: 20, |
| 67 | + prev: 100, |
| 68 | + curr: 20, |
| 69 | + }, |
| 70 | + { |
| 71 | + name: "t=1m: increment by 20", |
| 72 | + incrBy: 20, |
| 73 | + prev: 100, |
| 74 | + curr: 40, |
| 75 | + }, |
| 76 | + { |
| 77 | + name: "t=2m: move clock by 1m", |
| 78 | + advanceTime: time.Minute, |
| 79 | + prev: 40, |
| 80 | + curr: 0, |
| 81 | + }, |
| 82 | + { |
| 83 | + name: "t=2m: incr++", |
| 84 | + incrBy: 1, |
| 85 | + prev: 40, |
| 86 | + curr: 1, |
| 87 | + }, |
| 88 | + { |
| 89 | + name: "t=2m: incr+=9", |
| 90 | + incrBy: 9, |
| 91 | + prev: 40, |
| 92 | + curr: 10, |
| 93 | + }, |
| 94 | + { |
| 95 | + name: "t=2m: incr+=20", |
| 96 | + incrBy: 20, |
| 97 | + prev: 40, |
| 98 | + curr: 30, |
| 99 | + }, |
| 100 | + { |
| 101 | + name: "t=4m: move clock by 2m", |
| 102 | + advanceTime: 2 * time.Minute, |
| 103 | + prev: 0, |
| 104 | + curr: 0, |
| 105 | + }, |
| 106 | + } |
| 107 | + |
| 108 | + concurrentRequests := 1000 |
| 109 | + |
| 110 | + for _, tt := range tests { |
| 111 | + if tt.advanceTime > 0 { |
| 112 | + currentWindow = currentWindow.Add(tt.advanceTime) |
| 113 | + previousWindow = previousWindow.Add(tt.advanceTime) |
| 114 | + } |
| 115 | + |
| 116 | + if tt.incrBy > 0 { |
| 117 | + var g errgroup.Group |
| 118 | + for i := 0; i < concurrentRequests; i++ { |
| 119 | + i := i |
| 120 | + g.Go(func() error { |
| 121 | + key := fmt.Sprintf("key:%v", i) |
| 122 | + return limitCounter.IncrementBy(key, currentWindow, tt.incrBy) |
| 123 | + }) |
| 124 | + } |
| 125 | + if err := g.Wait(); err != nil { |
| 126 | + t.Errorf("%s: %v", tt.name, err) |
| 127 | + } |
| 128 | + } |
| 129 | + |
| 130 | + var g errgroup.Group |
| 131 | + for i := 0; i < concurrentRequests; i++ { |
| 132 | + i := i |
| 133 | + g.Go(func() error { |
| 134 | + key := fmt.Sprintf("key:%v", i) |
| 135 | + curr, prev, err := limitCounter.Get(key, currentWindow, previousWindow) |
| 136 | + if err != nil { |
| 137 | + return fmt.Errorf("%q: %w", key, err) |
| 138 | + } |
| 139 | + if curr != tt.curr { |
| 140 | + return fmt.Errorf("%q: unexpected curr = %v, expected %v", key, curr, tt.curr) |
| 141 | + } |
| 142 | + if prev != tt.prev { |
| 143 | + return fmt.Errorf("%q: unexpected prev = %v, expected %v", key, prev, tt.prev) |
| 144 | + } |
| 145 | + return nil |
| 146 | + }) |
| 147 | + } |
| 148 | + if err := g.Wait(); err != nil { |
| 149 | + t.Errorf("%s: %v", tt.name, err) |
| 150 | + } |
| 151 | + } |
| 152 | +} |
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