73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
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package util
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import (
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"golang.org/x/time/rate"
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)
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func TestNewValidRateLimiter(t *testing.T) {
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cases := []struct {
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name string
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r rate.Limit
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b int
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hasError bool
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}{
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{"valid limiter", 0.1, 1, false},
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{"zero rate", 0, 1, true},
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{"zero burst", 0.1, 0, true},
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{"both zero", 0, 0, true},
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}
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for _, c := range cases {
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t.Run(c.name, func(t *testing.T) {
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limiter, err := NewValidLimiter(c.r, c.b)
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assert.Equal(t, c.hasError, err != nil)
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if !c.hasError {
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assert.NotNil(t, limiter)
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}
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})
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}
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}
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func TestShouldDelay(t *testing.T) {
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minInterval := time.Second * 3
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maxRate := rate.Limit(1 / minInterval.Seconds())
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limiter := rate.NewLimiter(maxRate, 1)
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assert.Equal(t, time.Duration(0), ShouldDelay(limiter, minInterval))
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for i := 0; i < 100; i++ {
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assert.True(t, ShouldDelay(limiter, minInterval) > 0)
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}
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}
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func TestParseRateLimitSyntax(t *testing.T) {
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var tests = []struct {
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desc string
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expectedBurst int
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expectedRate float64
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wantErr bool
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}{
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{"2+1/5s", 2, 1.0 / 5.0, false},
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{"5+1/3m", 5, 1 / 3 * 60.0, false},
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{"1m", 1, 1.0 / 60.0, false},
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}
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for _, test := range tests {
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t.Run(test.desc, func(t *testing.T) {
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limiter, err := ParseRateLimitSyntax(test.desc)
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if test.wantErr {
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assert.Error(t, err)
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} else if assert.NoError(t, err) {
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assert.NotNil(t, limiter)
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burst := limiter.Burst()
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assert.Equal(t, test.expectedBurst, burst)
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limit := limiter.Limit()
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assert.InDeltaf(t, test.expectedRate, float64(limit), 0.01, "expected rate %f, got %f", test.expectedRate, limit)
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}
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})
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}
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}
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