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110 lines
2.2 KiB
Go
110 lines
2.2 KiB
Go
package eventbus
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import (
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"context"
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"fmt"
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"math/rand"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"go.uber.org/atomic"
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)
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func TestEventbusRegUnreg(t *testing.T) {
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var (
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a = assert.New(t)
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bus = New()
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)
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a.Empty(bus.handlers)
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h1 := bus.Register(nil)
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a.NotZero(h1)
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h2 := bus.Register(nil)
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a.NotZero(h2)
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h3 := bus.Register(nil)
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a.NotZero(h3)
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a.Len(bus.handlers, 3)
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bus.Unregister(h1)
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a.Len(bus.handlers, 2)
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bus.Unregister(h2)
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a.Len(bus.handlers, 1)
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bus.Unregister(h3)
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a.Empty(bus.handlers)
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}
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func BenchmarkEventbusHandlerLookup(b *testing.B) {
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var (
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bus = New()
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ptrs []uintptr
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)
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// Register handlers
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for n := 0; n < b.N; n++ {
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ptrs = append(ptrs, bus.Register(nil))
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}
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// Register find & fire handlers
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for n := 0; n < b.N; n++ {
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bus.find(nil)
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}
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}
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func BenchmarkEventbusRegUnreg(b *testing.B) {
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var (
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bus = New()
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ptrs []uintptr
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)
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// Register handlers
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for n := 0; n < b.N; n++ {
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ptrs = append(ptrs, bus.Register(nil))
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}
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// Shuffle stored pinters
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rand.Seed(time.Now().UnixNano())
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rand.Shuffle(len(ptrs), func(i, j int) { ptrs[i], ptrs[j] = ptrs[j], ptrs[i] })
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// Unregister all pointers
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for _, ptr := range ptrs {
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bus.Unregister(ptr)
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}
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}
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func TestEventFiring(t *testing.T) {
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var (
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a = assert.New(t)
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// Let's make sure our simple tests don't
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// cause any extra stress with dat race conditions
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i = &atomic.Int32{}
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ev = func(ev string) Event {
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return &mockEvent{rType: "resource", eType: ev}
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}
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ctx = context.Background()
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bus = New()
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)
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bus.Register(func(ctx context.Context, ev Event) error { i.Inc(); return nil }, On("inc"), For("resource"))
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bus.Register(func(ctx context.Context, ev Event) error { i.Dec(); return nil }, On("dec"), For("resource"))
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bus.Register(func(ctx context.Context, ev Event) error { return fmt.Errorf("handl-err") }, On("err"), For("resource"))
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a.Equal(int32(0), i.Load())
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a.NoError(bus.WaitFor(ctx, ev("inc")))
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a.Equal(int32(1), i.Load())
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a.NoError(bus.WaitFor(ctx, ev("inc")))
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a.Equal(int32(2), i.Load())
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a.NoError(bus.WaitFor(ctx, ev("dec")))
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a.Equal(int32(1), i.Load())
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a.EqualError(bus.WaitFor(ctx, ev("err")), "handl-err")
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bus.Dispatch(ctx, ev("dec"))
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bus.Dispatch(ctx, ev("inc"))
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bus.Dispatch(ctx, ev("inc"))
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bus.wait()
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a.Equal(int32(2), i.Load())
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}
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