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			69 lines
		
	
	
		
			1.4 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			69 lines
		
	
	
		
			1.4 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
// Copyright 2018 The Cockroach Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//     http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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// implied. See the License for the specific language governing
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// permissions and limitations under the License. See the AUTHORS file
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// for names of contributors.
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package randvar
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import (
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	"fmt"
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	"sort"
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	"testing"
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	"github.com/stretchr/testify/require"
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)
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func dumpSamples(x []int) {
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	sort.Ints(x)
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	max := x[len(x)-1]
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	step := max / 20
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	if step == 0 {
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		step = 1
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	}
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	index := 0
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	count := 0
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	for i := 0; i <= max; i += step {
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		count = 0
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		for index < len(x) {
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			if x[index] >= i+step {
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				break
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			}
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			index++
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			count++
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		}
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		fmt.Printf("[%3d-%3d) ", i, i+step)
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		for j := 0; j < count; j++ {
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			if j%50 == 0 {
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				fmt.Printf("%c", '∎')
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			}
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		}
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		fmt.Println()
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	}
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}
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func TestSkewedLatest(t *testing.T) {
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	rng := NewRand()
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	z, err := NewSkewedLatest(0, 99, 0.99)
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	require.NoError(t, err)
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	x := make([]int, 10000)
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	for i := range x {
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		x[i] = int(z.Uint64(rng))
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	}
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	if testing.Verbose() {
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		dumpSamples(x)
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	}
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}
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