590fc33955
- NewLimiterRegistry + For(name, rate, burst) idempotent lookup - Wait blocks on token then applies 100ms-1s jitter when stealth - Per-source isolation (RECON-INFRA-05), ctx cancellation honored - Tests: isolation, idempotency, ctx cancel, jitter range, no-jitter
62 lines
1.8 KiB
Go
62 lines
1.8 KiB
Go
package recon
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import (
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"context"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"golang.org/x/time/rate"
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)
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func TestLimiterPerSourceIsolation(t *testing.T) {
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r := NewLimiterRegistry()
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a := r.For("a", 10, 1)
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b := r.For("b", 10, 1)
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require.NotNil(t, a)
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require.NotNil(t, b)
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require.NotSame(t, a, b, "different source names must yield distinct limiters")
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}
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func TestLimiterIdempotent(t *testing.T) {
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r := NewLimiterRegistry()
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a1 := r.For("a", 10, 1)
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a2 := r.For("a", 10, 1)
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require.Same(t, a1, a2, "repeat calls with same name must return same *rate.Limiter")
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}
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func TestWaitRespectsContext(t *testing.T) {
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r := NewLimiterRegistry()
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// Prime limiter with a very slow rate so Wait would block
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_ = r.For("slow", rate.Limit(0.001), 1)
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// Consume the single burst token so the next Wait actually blocks
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l := r.For("slow", rate.Limit(0.001), 1)
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require.True(t, l.Allow())
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ctx, cancel := context.WithCancel(context.Background())
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cancel() // pre-cancelled
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err := r.Wait(ctx, "slow", rate.Limit(0.001), 1, false)
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require.Error(t, err)
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}
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func TestJitterRange(t *testing.T) {
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r := NewLimiterRegistry()
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// High rate so only jitter meaningfully contributes
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start := time.Now()
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err := r.Wait(context.Background(), "fast", rate.Limit(1000), 100, true)
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elapsed := time.Since(start)
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require.NoError(t, err)
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require.GreaterOrEqual(t, elapsed, 90*time.Millisecond, "jitter should be >= 100ms (with slack)")
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require.LessOrEqual(t, elapsed, 1200*time.Millisecond, "jitter should be <= 1s (with slack)")
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}
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func TestJitterDisabled(t *testing.T) {
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r := NewLimiterRegistry()
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start := time.Now()
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err := r.Wait(context.Background(), "fast2", rate.Limit(1000), 100, false)
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elapsed := time.Since(start)
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require.NoError(t, err)
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require.Less(t, elapsed, 50*time.Millisecond, "no jitter when stealth=false")
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}
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