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statistics-from-a-large-sample_test.go
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package problem1093
import (
"testing"
"github.com/stretchr/testify/assert"
)
// tcs is testcase slice
var tcs = []struct {
count []int
ans []float64
}{
{
[]int{2725123, 2529890, 2612115, 3807943, 3002363, 3107290, 2767526, 981092, 896521, 2576757, 2808163, 3315813, 2004022, 2516900, 607052, 1203189, 2907162, 1849193, 1486120, 743035, 3621726, 3366475, 639843, 3836904, 462733, 2614577, 1881392, 85099, 709390, 3534613, 360309, 404975, 715871, 2258745, 1682843, 3725079, 564127, 1893839, 2793387, 2236577, 522108, 1183512, 859756, 3431566, 907265, 1272267, 2261055, 2234764, 1901434, 3023329, 863353, 2140290, 2221702, 623198, 955635, 304443, 282157, 3133971, 1985993, 1113476, 2092502, 2896781, 1245030, 2681380, 2286852, 3423914, 3549428, 2720176, 2832468, 3608887, 174642, 1437770, 1545228, 650920, 2357584, 3037465, 3674038, 2450617, 578392, 622803, 3206006, 3685232, 2687252, 1001246, 3865843, 2755767, 184888, 2543886, 2567950, 1755006, 249516, 3241670, 1422728, 809805, 955992, 415481, 26094, 2757283, 995334, 3713918, 2772540, 2719728, 1204666, 1590541, 2962447, 779517, 1322374, 1675147, 3146304, 2412486, 902468, 259007, 3161334, 1735554, 2623893, 1863961, 520352, 167827, 3654335, 3492218, 1449347, 1460253, 983079, 1135, 208617, 969433, 2669769, 284741, 1002734, 3694338, 2567646, 3042965, 3186843, 906766, 2755956, 2075889, 1241484, 3790012, 2037406, 2776032, 1123633, 2537866, 3028339, 3375304, 1621954, 2299012, 1518828, 1380554, 2083623, 3521053, 1291275, 180303, 1344232, 2122185, 2519290, 832389, 1711223, 2828198, 2747583, 789884, 2116590, 2294299, 1038729, 1996529, 600580, 184130, 3044375, 261274, 3041086, 3473202, 2318793, 2967147, 2506188, 127448, 290011, 3868450, 1659949, 3662189, 1720152, 25266, 1126602, 1015878, 2635566, 619797, 2898869, 3470795, 2226675, 2348104, 2914940, 1907109, 604482, 2574752, 1841777, 880254, 616721, 3786049, 2278898, 3797514, 1328854, 1881493, 1802018, 3034791, 3615171, 400080, 2277949, 221689, 1021253, 544372, 3101480, 1155691, 3730276, 1827138, 3621214, 2348383, 2305429, 313820, 36481, 2581470, 2794393, 902504, 2589859, 740480, 2387513, 2716342, 1914543, 3219912, 1865333, 2388350, 3525289, 3758988, 961406, 1539328, 448809, 1326527, 1339048, 2924378, 2715811, 376047, 3642811, 2973602, 389167, 1026011, 3633833, 2848596, 3353421, 1426817, 219995, 1503946, 2311246, 2618861, 1497325, 3758762, 2115273, 3238053, 2419849, 2545790},
[]float64{0, 255, 128.64187, 131, 175},
},
{
[]int{0, 1, 3, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
[]float64{1.00000, 3.00000, 2.37500, 2.50000, 3.00000},
},
{
[]int{0, 4, 3, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
[]float64{1.00000, 4.00000, 2.18182, 2.00000, 1.00000},
},
// 可以有多个 testcase
}
func Test_sampleStats(t *testing.T) {
ast := assert.New(t)
for _, tc := range tcs {
ans := sampleStats(tc.count)
ast.InDeltaSlice(tc.ans, ans, 0.00001, "输入：%v", tc)
}
}
func Benchmark_sampleStats(b *testing.B) {
for i := 0; i < b.N; i++ {
for _, tc := range tcs {
sampleStats(tc.count)
}
}
}