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package util
import (
"math/rand"
"testing"
)
type testCaseLengthStats struct {
data []uint64
q1, median, q3 float64
n50 uint64
min, max uint64
}
var cases = []testCaseLengthStats{
testCaseLengthStats{
data: []uint64{},
median: 0,
q1: 0,
q3: 0,
n50: 0,
min: 0,
max: 0,
},
testCaseLengthStats{
data: []uint64{2},
median: 2,
q1: 1,
q3: 1,
n50: 2,
min: 2,
max: 2,
},
testCaseLengthStats{
data: []uint64{1, 2},
median: 1.5,
q1: 1,
q3: 2,
n50: 2,
min: 1,
max: 2,
},
testCaseLengthStats{
data: []uint64{1, 2, 3},
median: 2,
q1: 1.5,
q3: 2.5,
n50: 3,
min: 1,
max: 3,
},
testCaseLengthStats{
data: []uint64{1, 2, 3, 4},
median: 2.5,
q1: 1.5,
q3: 3.5,
n50: 3,
min: 1,
max: 4,
},
testCaseLengthStats{
data: []uint64{2, 3, 4, 5, 6, 7, 8, 9},
median: 5.5,
q1: 3.5,
q3: 7.5,
n50: 7,
min: 2,
max: 9,
},
}
func Test(t *testing.T) {
for i, _case := range cases {
rand.Shuffle(len(_case.data), func(i, j int) {
_case.data[i], _case.data[j] = _case.data[j], _case.data[i]
})
stats := NewLengthStats()
for _, l := range _case.data {
stats.Add(l)
}
if stats.Count() != uint64(len(_case.data)) {
t.Errorf("case %d: count mismatch", i)
}
min := stats.Min()
if min != _case.min {
t.Errorf("case %d: min mismatch: %d != %d", i, min, _case.min)
}
max := stats.Max()
if max != _case.max {
t.Errorf("case %d: max mismatch: %d != %d", i, max, _case.max)
}
median := stats.Median()
if median != _case.median {
t.Errorf("case %d: median mismatch: %f != %f", i, median, _case.median)
}
q1 := stats.Q1()
if q1 != _case.q1 {
t.Errorf("case %d: q1 mismatch: %f != %f", i, q1, _case.q1)
}
q3 := stats.Q3()
if q1 != _case.q1 {
t.Errorf("case %d: q3 mismatch: %f != %f", i, q3, _case.q3)
}
n50 := stats.N50()
if n50 != _case.n50 {
t.Errorf("case %d: n50 mismatch: %d != %d", i, n50, _case.n50)
}
}
}
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