render_allocation_measurement_test.go RawHistoryFolder

1package daemon
2
3import (
4	"runtime"
5	"testing"
6
7	"github.com/stretchr/testify/require"
8)
9
10var renderAllocationMeasurementSink []byte
11
12func TestRenderByteMeasurementUsesBoundedRunsAndExcludesWarmup(t *testing.T) {
13	defer func() { renderAllocationMeasurementSink = nil }()
14	for _, size := range []int{128, 4096} {
15		calls := 0
16		procs := runtime.GOMAXPROCS(0)
17		got := renderAllocatedBytesPerRun(func() {
18			calls++
19			if calls == 1 {
20				renderAllocationMeasurementSink = make([]byte, 1<<20)
21			} else {
22				renderAllocationMeasurementSink = make([]byte, size)
23			}
24		})
25		require.Equal(t, 21, calls, "one warmup and twenty samples, not a time-calibrated benchmark")
26		require.Equal(t, procs, runtime.GOMAXPROCS(0))
27		require.GreaterOrEqual(t, got, int64(size))
28		require.Less(t, got, int64(size*2), "warmup bytes must not enter the per-operation measurement")
29	}
30}