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df412f17d3
* Recover after feed fetch failure with exponential backoff The current implementation stops attempting to fetch a feed if fusion encounters any error fetching it. The only way to continue fetching the feed is if the user manually forces a refresh. This allows fusion to recover from feed fetch errors by tracking the number of consecutive failures and slowing down requests for consistent failure. If a feed always fails, we eventually slow to only checking it once per week. Fixes #67 * Add comment
55 lines
1.3 KiB
Go
55 lines
1.3 KiB
Go
package pull_test
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import (
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"math"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/0x2e/fusion/service/pull"
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)
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func TestCalculateBackoffTime(t *testing.T) {
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for _, tt := range []struct {
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name string
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consecutiveFailures uint
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expectedBackoff time.Duration
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}{
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{
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name: "no failures",
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consecutiveFailures: 0,
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expectedBackoff: 0,
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},
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{
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name: "one failure",
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consecutiveFailures: 1,
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expectedBackoff: 54 * time.Minute, // 30 * (1.8^1) = 54 minutes
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},
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{
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name: "two failures",
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consecutiveFailures: 2,
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expectedBackoff: 97 * time.Minute, // 30 * (1.8^2) = 97.2 minutes ≈ 97 minutes
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},
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{
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name: "three failures",
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consecutiveFailures: 3,
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expectedBackoff: 174 * time.Minute, // 30 * (1.8^3) = 174.96 minutes ≈ 174 minutes
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},
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{
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name: "many failures",
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consecutiveFailures: 10000,
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expectedBackoff: 7 * 24 * time.Hour, // Maximum backoff (7 days)
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},
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{
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name: "maximum failures",
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consecutiveFailures: math.MaxUint,
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expectedBackoff: 7 * 24 * time.Hour, // Maximum backoff (7 days)
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},
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} {
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t.Run(tt.name, func(t *testing.T) {
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backoff := pull.CalculateBackoffTime(tt.consecutiveFailures)
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assert.Equal(t, tt.expectedBackoff, backoff)
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})
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}
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}
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