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44 lines
1004 B
Go
44 lines
1004 B
Go
package queue
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import (
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"fmt"
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"strconv"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestBalancedQueuePusher(t *testing.T) {
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const numPushers = 100
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var pushers []Pusher
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var mockedPushers []*mockedPusher
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for i := 0; i < numPushers; i++ {
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p := &mockedPusher{
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name: "pusher:" + strconv.Itoa(i),
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}
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pushers = append(pushers, p)
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mockedPushers = append(mockedPushers, p)
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}
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pusher := NewBalancedQueuePusher(pushers)
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assert.True(t, len(pusher.Name()) > 0)
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for i := 0; i < numPushers*1000; i++ {
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assert.Nil(t, pusher.Push("item"))
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}
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var counts []int
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for _, p := range mockedPushers {
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counts = append(counts, p.count)
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}
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mean := calcMean(counts)
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variance := calcVariance(mean, counts)
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assert.True(t, variance < 100, fmt.Sprintf("too big variance - %.2f", variance))
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}
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func TestBalancedQueuePusher_NoAvailable(t *testing.T) {
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pusher := NewBalancedQueuePusher(nil)
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assert.True(t, len(pusher.Name()) == 0)
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assert.Equal(t, ErrNoAvailablePusher, pusher.Push("item"))
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}
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