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backoff_test.go
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backoff_test.go
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package backoff
import (
"math"
"testing"
)
func TestPow2(t *testing.T) {
args := []uint{0, 1, 2, 3, 4}
expectedValues := []uint{0, 2, 4, 8, 16}
for i, expected := range expectedValues {
if actual := Pow2(args[i]); expected != actual {
t.Errorf("Expected '%d', got '%d'", expected, actual)
}
}
}
func TestHalfJitter(t *testing.T) {
f := HalfJitter(0, math.MaxInt64)
expected := uint(0)
if actual := f(0); expected != actual {
t.Errorf("Expected '%d', got '%d'", expected, actual)
}
args := []uint{1, 2, 3, 4, 10, 60, 100}
expectedMins := []uint{1, 2, 4, 8, 512, 180000, 180000}
expectedCaps := []uint{2, 4, 8, 16, 1024, 1152921504606846976, math.MaxInt64}
for i, expectedCap := range expectedCaps {
for j := 0; j < 1000; j += 1 {
expectedMin := expectedMins[i]
actual := f(args[i])
if actual < expectedMin {
t.Errorf("Expected value above '%d', got '%d'", expectedMin, actual)
t.FailNow()
}
if expectedCap < actual {
t.Errorf("Expected value below '%d', got '%d'", expectedCap, actual)
t.FailNow()
}
}
}
}
func TestFullJitter(t *testing.T) {
f := FullJitter(0, math.MaxInt64)
expected := uint(0)
if actual := f(0); expected != actual {
t.Errorf("Expected '%d', got '%d'", expected, actual)
}
args := []uint{1, 2, 3, 4, 10, 60, 100}
expectedCaps := []uint{20, 40, 160, 320, 10240, 1152921504606846976, math.MaxInt64}
for i, expectedCap := range expectedCaps {
for j := 0; j < 1000; j += 1 {
if actual := f(args[i]); expectedCap < actual {
t.Errorf("Expected value below '%d', got '%d'", expectedCap, actual)
t.FailNow()
}
}
}
}
func TestPow2Uint(t *testing.T) {
args := []uint{0, 1, 2, 3, 4, 10, 60, 100}
expectedValues := []uint{1, 2, 4, 8, 16, 1024, 1152921504606846976, 9223372036854775808}
for i, expected := range expectedValues {
if actual := pow2Uint(args[i]); expected < actual {
t.Errorf("Expected '%d', got '%d'", expected, actual)
}
}
}