mirror of
https://github.com/golang/go
synced 2024-11-23 05:50:05 -07:00
694 lines
14 KiB
Go
694 lines
14 KiB
Go
// run
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test maps, almost exhaustively.
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package main
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import (
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"fmt"
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"math"
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"strconv"
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"time"
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)
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const count = 100
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func P(a []string) string {
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s := "{"
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for i := 0; i < len(a); i++ {
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if i > 0 {
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s += ","
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}
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s += `"` + a[i] + `"`
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}
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s += "}"
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return s
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}
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func main() {
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testbasic()
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testfloat()
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testnan()
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}
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func testbasic() {
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// Test a map literal.
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mlit := map[string]int{"0": 0, "1": 1, "2": 2, "3": 3, "4": 4}
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for i := 0; i < len(mlit); i++ {
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s := string([]byte{byte(i) + '0'})
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if mlit[s] != i {
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fmt.Printf("mlit[%s] = %d\n", s, mlit[s])
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}
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}
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mib := make(map[int]bool)
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mii := make(map[int]int)
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mfi := make(map[float32]int)
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mif := make(map[int]float32)
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msi := make(map[string]int)
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mis := make(map[int]string)
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mss := make(map[string]string)
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mspa := make(map[string][]string)
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// BUG need an interface map both ways too
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type T struct {
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i int64 // can't use string here; struct values are only compared at the top level
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f float32
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}
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mipT := make(map[int]*T)
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mpTi := make(map[*T]int)
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mit := make(map[int]T)
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// mti := make(map[T] int)
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type M map[int]int
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mipM := make(map[int]M)
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var apT [2 * count]*T
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for i := 0; i < count; i++ {
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s := strconv.Itoa(i)
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s10 := strconv.Itoa(i * 10)
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f := float32(i)
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t := T{int64(i), f}
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apT[i] = new(T)
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apT[i].i = int64(i)
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apT[i].f = f
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apT[2*i] = new(T) // need twice as many entries as we use, for the nonexistence check
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apT[2*i].i = int64(i)
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apT[2*i].f = f
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m := M{i: i + 1}
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mib[i] = (i != 0)
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mii[i] = 10 * i
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mfi[float32(i)] = 10 * i
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mif[i] = 10.0 * f
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mis[i] = s
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msi[s] = i
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mss[s] = s10
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mss[s] = s10
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as := make([]string, 2)
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as[0] = s10
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as[1] = s10
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mspa[s] = as
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mipT[i] = apT[i]
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mpTi[apT[i]] = i
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mipM[i] = m
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mit[i] = t
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// mti[t] = i
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}
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// test len
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if len(mib) != count {
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fmt.Printf("len(mib) = %d\n", len(mib))
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}
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if len(mii) != count {
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fmt.Printf("len(mii) = %d\n", len(mii))
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}
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if len(mfi) != count {
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fmt.Printf("len(mfi) = %d\n", len(mfi))
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}
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if len(mif) != count {
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fmt.Printf("len(mif) = %d\n", len(mif))
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}
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if len(msi) != count {
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fmt.Printf("len(msi) = %d\n", len(msi))
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}
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if len(mis) != count {
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fmt.Printf("len(mis) = %d\n", len(mis))
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}
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if len(mss) != count {
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fmt.Printf("len(mss) = %d\n", len(mss))
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}
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if len(mspa) != count {
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fmt.Printf("len(mspa) = %d\n", len(mspa))
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}
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if len(mipT) != count {
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fmt.Printf("len(mipT) = %d\n", len(mipT))
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}
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if len(mpTi) != count {
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fmt.Printf("len(mpTi) = %d\n", len(mpTi))
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}
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// if len(mti) != count {
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// fmt.Printf("len(mti) = %d\n", len(mti))
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// }
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if len(mipM) != count {
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fmt.Printf("len(mipM) = %d\n", len(mipM))
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}
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// if len(mti) != count {
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// fmt.Printf("len(mti) = %d\n", len(mti))
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// }
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if len(mit) != count {
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fmt.Printf("len(mit) = %d\n", len(mit))
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}
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// test construction directly
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for i := 0; i < count; i++ {
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s := strconv.Itoa(i)
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s10 := strconv.Itoa(i * 10)
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f := float32(i)
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// BUG m := M(i, i+1)
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if mib[i] != (i != 0) {
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fmt.Printf("mib[%d] = %t\n", i, mib[i])
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}
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if mii[i] != 10*i {
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fmt.Printf("mii[%d] = %d\n", i, mii[i])
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}
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if mfi[f] != 10*i {
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fmt.Printf("mfi[%d] = %d\n", i, mfi[f])
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}
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if mif[i] != 10.0*f {
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fmt.Printf("mif[%d] = %g\n", i, mif[i])
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}
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if mis[i] != s {
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fmt.Printf("mis[%d] = %s\n", i, mis[i])
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}
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if msi[s] != i {
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fmt.Printf("msi[%s] = %d\n", s, msi[s])
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}
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if mss[s] != s10 {
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fmt.Printf("mss[%s] = %g\n", s, mss[s])
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}
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for j := 0; j < len(mspa[s]); j++ {
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if mspa[s][j] != s10 {
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fmt.Printf("mspa[%s][%d] = %s\n", s, j, mspa[s][j])
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}
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}
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if mipT[i].i != int64(i) || mipT[i].f != f {
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fmt.Printf("mipT[%d] = %v\n", i, mipT[i])
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}
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if mpTi[apT[i]] != i {
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fmt.Printf("mpTi[apT[%d]] = %d\n", i, mpTi[apT[i]])
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}
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// if(mti[t] != i) {
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// fmt.Printf("mti[%s] = %s\n", s, mti[t])
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// }
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if mipM[i][i] != i+1 {
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fmt.Printf("mipM[%d][%d] = %d\n", i, i, mipM[i][i])
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}
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// if(mti[t] != i) {
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// fmt.Printf("mti[%v] = %d\n", t, mti[t])
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// }
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if mit[i].i != int64(i) || mit[i].f != f {
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fmt.Printf("mit[%d] = {%d %g}\n", i, mit[i].i, mit[i].f)
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}
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}
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// test existence with tuple check
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// failed lookups yield a false value for the boolean.
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for i := 0; i < count; i++ {
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s := strconv.Itoa(i)
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f := float32(i)
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{
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_, b := mib[i]
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if !b {
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fmt.Printf("tuple existence decl: mib[%d]\n", i)
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}
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_, b = mib[i]
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if !b {
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fmt.Printf("tuple existence assign: mib[%d]\n", i)
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}
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}
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{
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_, b := mii[i]
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if !b {
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fmt.Printf("tuple existence decl: mii[%d]\n", i)
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}
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_, b = mii[i]
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if !b {
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fmt.Printf("tuple existence assign: mii[%d]\n", i)
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}
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}
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{
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_, b := mfi[f]
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if !b {
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fmt.Printf("tuple existence decl: mfi[%d]\n", i)
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}
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_, b = mfi[f]
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if !b {
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fmt.Printf("tuple existence assign: mfi[%d]\n", i)
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}
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}
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{
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_, b := mif[i]
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if !b {
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fmt.Printf("tuple existence decl: mif[%d]\n", i)
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}
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_, b = mif[i]
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if !b {
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fmt.Printf("tuple existence assign: mif[%d]\n", i)
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}
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}
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{
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_, b := mis[i]
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if !b {
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fmt.Printf("tuple existence decl: mis[%d]\n", i)
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}
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_, b = mis[i]
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if !b {
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fmt.Printf("tuple existence assign: mis[%d]\n", i)
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}
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}
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{
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_, b := msi[s]
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if !b {
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fmt.Printf("tuple existence decl: msi[%d]\n", i)
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}
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_, b = msi[s]
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if !b {
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fmt.Printf("tuple existence assign: msi[%d]\n", i)
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}
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}
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{
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_, b := mss[s]
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if !b {
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fmt.Printf("tuple existence decl: mss[%d]\n", i)
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}
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_, b = mss[s]
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if !b {
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fmt.Printf("tuple existence assign: mss[%d]\n", i)
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}
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}
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{
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_, b := mspa[s]
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if !b {
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fmt.Printf("tuple existence decl: mspa[%d]\n", i)
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}
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_, b = mspa[s]
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if !b {
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fmt.Printf("tuple existence assign: mspa[%d]\n", i)
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}
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}
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{
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_, b := mipT[i]
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if !b {
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fmt.Printf("tuple existence decl: mipT[%d]\n", i)
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}
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_, b = mipT[i]
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if !b {
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fmt.Printf("tuple existence assign: mipT[%d]\n", i)
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}
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}
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{
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_, b := mpTi[apT[i]]
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if !b {
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fmt.Printf("tuple existence decl: mpTi[apT[%d]]\n", i)
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}
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_, b = mpTi[apT[i]]
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if !b {
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fmt.Printf("tuple existence assign: mpTi[apT[%d]]\n", i)
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}
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}
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{
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_, b := mipM[i]
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if !b {
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fmt.Printf("tuple existence decl: mipM[%d]\n", i)
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}
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_, b = mipM[i]
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if !b {
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fmt.Printf("tuple existence assign: mipM[%d]\n", i)
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}
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}
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{
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_, b := mit[i]
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if !b {
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fmt.Printf("tuple existence decl: mit[%d]\n", i)
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}
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_, b = mit[i]
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if !b {
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fmt.Printf("tuple existence assign: mit[%d]\n", i)
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}
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}
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// {
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// _, b := mti[t]
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// if !b {
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// fmt.Printf("tuple existence decl: mti[%d]\n", i)
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// }
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// _, b = mti[t]
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// if !b {
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// fmt.Printf("tuple existence assign: mti[%d]\n", i)
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// }
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// }
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}
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// test nonexistence with tuple check
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// failed lookups yield a false value for the boolean.
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for i := count; i < 2*count; i++ {
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s := strconv.Itoa(i)
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f := float32(i)
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{
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_, b := mib[i]
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if b {
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fmt.Printf("tuple nonexistence decl: mib[%d]", i)
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}
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_, b = mib[i]
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if b {
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fmt.Printf("tuple nonexistence assign: mib[%d]", i)
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}
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}
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{
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_, b := mii[i]
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if b {
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fmt.Printf("tuple nonexistence decl: mii[%d]", i)
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}
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_, b = mii[i]
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if b {
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fmt.Printf("tuple nonexistence assign: mii[%d]", i)
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}
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}
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{
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_, b := mfi[f]
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if b {
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fmt.Printf("tuple nonexistence decl: mfi[%d]", i)
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}
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_, b = mfi[f]
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if b {
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fmt.Printf("tuple nonexistence assign: mfi[%d]", i)
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}
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}
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{
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_, b := mif[i]
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if b {
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fmt.Printf("tuple nonexistence decl: mif[%d]", i)
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}
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_, b = mif[i]
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if b {
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fmt.Printf("tuple nonexistence assign: mif[%d]", i)
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}
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}
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{
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_, b := mis[i]
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if b {
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fmt.Printf("tuple nonexistence decl: mis[%d]", i)
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}
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_, b = mis[i]
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if b {
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fmt.Printf("tuple nonexistence assign: mis[%d]", i)
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}
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}
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{
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_, b := msi[s]
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if b {
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fmt.Printf("tuple nonexistence decl: msi[%d]", i)
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}
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_, b = msi[s]
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if b {
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fmt.Printf("tuple nonexistence assign: msi[%d]", i)
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}
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}
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{
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_, b := mss[s]
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if b {
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fmt.Printf("tuple nonexistence decl: mss[%d]", i)
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}
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_, b = mss[s]
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if b {
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fmt.Printf("tuple nonexistence assign: mss[%d]", i)
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}
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}
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{
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_, b := mspa[s]
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if b {
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fmt.Printf("tuple nonexistence decl: mspa[%d]", i)
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}
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_, b = mspa[s]
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if b {
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fmt.Printf("tuple nonexistence assign: mspa[%d]", i)
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}
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}
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{
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_, b := mipT[i]
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if b {
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fmt.Printf("tuple nonexistence decl: mipT[%d]", i)
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}
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_, b = mipT[i]
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if b {
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fmt.Printf("tuple nonexistence assign: mipT[%d]", i)
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}
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}
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{
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_, b := mpTi[apT[i]]
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if b {
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fmt.Printf("tuple nonexistence decl: mpTi[apt[%d]]", i)
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}
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_, b = mpTi[apT[i]]
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if b {
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fmt.Printf("tuple nonexistence assign: mpTi[apT[%d]]", i)
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}
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}
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{
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_, b := mipM[i]
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if b {
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fmt.Printf("tuple nonexistence decl: mipM[%d]", i)
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}
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_, b = mipM[i]
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if b {
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fmt.Printf("tuple nonexistence assign: mipM[%d]", i)
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}
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}
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// {
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// _, b := mti[t]
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// if b {
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// fmt.Printf("tuple nonexistence decl: mti[%d]", i)
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// }
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// _, b = mti[t]
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// if b {
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// fmt.Printf("tuple nonexistence assign: mti[%d]", i)
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// }
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// }
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{
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_, b := mit[i]
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if b {
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fmt.Printf("tuple nonexistence decl: mit[%d]", i)
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}
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_, b = mit[i]
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if b {
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fmt.Printf("tuple nonexistence assign: mit[%d]", i)
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}
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}
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}
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// tests for structured map element updates
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for i := 0; i < count; i++ {
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s := strconv.Itoa(i)
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mspa[s][i%2] = "deleted"
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if mspa[s][i%2] != "deleted" {
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fmt.Printf("update mspa[%s][%d] = %s\n", s, i%2, mspa[s][i%2])
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}
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mipT[i].i += 1
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if mipT[i].i != int64(i)+1 {
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fmt.Printf("update mipT[%d].i = %d\n", i, mipT[i].i)
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}
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mipT[i].f = float32(i + 1)
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if mipT[i].f != float32(i+1) {
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fmt.Printf("update mipT[%d].f = %g\n", i, mipT[i].f)
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}
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mipM[i][i]++
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if mipM[i][i] != (i+1)+1 {
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fmt.Printf("update mipM[%d][%d] = %d\n", i, i, mipM[i][i])
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}
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}
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|
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// test range on nil map
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var mnil map[string]int
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for _, _ = range mnil {
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panic("range mnil")
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}
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}
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|
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func testfloat() {
|
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// Test floating point numbers in maps.
|
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// Two map keys refer to the same entry if the keys are ==.
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// The special cases, then, are that +0 == -0 and that NaN != NaN.
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|
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{
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var (
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pz = float32(0)
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nz = math.Float32frombits(1 << 31)
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nana = float32(math.NaN())
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nanb = math.Float32frombits(math.Float32bits(nana) ^ 2)
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)
|
|
|
|
m := map[float32]string{
|
|
pz: "+0",
|
|
nana: "NaN",
|
|
nanb: "NaN",
|
|
}
|
|
if m[pz] != "+0" {
|
|
fmt.Println("float32 map cannot read back m[+0]:", m[pz])
|
|
}
|
|
if m[nz] != "+0" {
|
|
fmt.Println("float32 map does not treat", pz, "and", nz, "as equal for read")
|
|
fmt.Println("float32 map does not treat -0 and +0 as equal for read")
|
|
}
|
|
m[nz] = "-0"
|
|
if m[pz] != "-0" {
|
|
fmt.Println("float32 map does not treat -0 and +0 as equal for write")
|
|
}
|
|
if _, ok := m[nana]; ok {
|
|
fmt.Println("float32 map allows NaN lookup (a)")
|
|
}
|
|
if _, ok := m[nanb]; ok {
|
|
fmt.Println("float32 map allows NaN lookup (b)")
|
|
}
|
|
if len(m) != 3 {
|
|
fmt.Println("float32 map should have 3 entries:", m)
|
|
}
|
|
m[nana] = "NaN"
|
|
m[nanb] = "NaN"
|
|
if len(m) != 5 {
|
|
fmt.Println("float32 map should have 5 entries:", m)
|
|
}
|
|
}
|
|
|
|
{
|
|
var (
|
|
pz = float64(0)
|
|
nz = math.Float64frombits(1 << 63)
|
|
nana = float64(math.NaN())
|
|
nanb = math.Float64frombits(math.Float64bits(nana) ^ 2)
|
|
)
|
|
|
|
m := map[float64]string{
|
|
pz: "+0",
|
|
nana: "NaN",
|
|
nanb: "NaN",
|
|
}
|
|
if m[nz] != "+0" {
|
|
fmt.Println("float64 map does not treat -0 and +0 as equal for read")
|
|
}
|
|
m[nz] = "-0"
|
|
if m[pz] != "-0" {
|
|
fmt.Println("float64 map does not treat -0 and +0 as equal for write")
|
|
}
|
|
if _, ok := m[nana]; ok {
|
|
fmt.Println("float64 map allows NaN lookup (a)")
|
|
}
|
|
if _, ok := m[nanb]; ok {
|
|
fmt.Println("float64 map allows NaN lookup (b)")
|
|
}
|
|
if len(m) != 3 {
|
|
fmt.Println("float64 map should have 3 entries:", m)
|
|
}
|
|
m[nana] = "NaN"
|
|
m[nanb] = "NaN"
|
|
if len(m) != 5 {
|
|
fmt.Println("float64 map should have 5 entries:", m)
|
|
}
|
|
}
|
|
|
|
{
|
|
var (
|
|
pz = complex64(0)
|
|
nz = complex(0, math.Float32frombits(1<<31))
|
|
nana = complex(5, float32(math.NaN()))
|
|
nanb = complex(5, math.Float32frombits(math.Float32bits(float32(math.NaN()))^2))
|
|
)
|
|
|
|
m := map[complex64]string{
|
|
pz: "+0",
|
|
nana: "NaN",
|
|
nanb: "NaN",
|
|
}
|
|
if m[nz] != "+0" {
|
|
fmt.Println("complex64 map does not treat -0 and +0 as equal for read")
|
|
}
|
|
m[nz] = "-0"
|
|
if m[pz] != "-0" {
|
|
fmt.Println("complex64 map does not treat -0 and +0 as equal for write")
|
|
}
|
|
if _, ok := m[nana]; ok {
|
|
fmt.Println("complex64 map allows NaN lookup (a)")
|
|
}
|
|
if _, ok := m[nanb]; ok {
|
|
fmt.Println("complex64 map allows NaN lookup (b)")
|
|
}
|
|
if len(m) != 3 {
|
|
fmt.Println("complex64 map should have 3 entries:", m)
|
|
}
|
|
m[nana] = "NaN"
|
|
m[nanb] = "NaN"
|
|
if len(m) != 5 {
|
|
fmt.Println("complex64 map should have 5 entries:", m)
|
|
}
|
|
}
|
|
|
|
{
|
|
var (
|
|
pz = complex128(0)
|
|
nz = complex(0, math.Float64frombits(1<<63))
|
|
nana = complex(5, float64(math.NaN()))
|
|
nanb = complex(5, math.Float64frombits(math.Float64bits(float64(math.NaN()))^2))
|
|
)
|
|
|
|
m := map[complex128]string{
|
|
pz: "+0",
|
|
nana: "NaN",
|
|
nanb: "NaN",
|
|
}
|
|
if m[nz] != "+0" {
|
|
fmt.Println("complex128 map does not treat -0 and +0 as equal for read")
|
|
}
|
|
m[nz] = "-0"
|
|
if m[pz] != "-0" {
|
|
fmt.Println("complex128 map does not treat -0 and +0 as equal for write")
|
|
}
|
|
if _, ok := m[nana]; ok {
|
|
fmt.Println("complex128 map allows NaN lookup (a)")
|
|
}
|
|
if _, ok := m[nanb]; ok {
|
|
fmt.Println("complex128 map allows NaN lookup (b)")
|
|
}
|
|
if len(m) != 3 {
|
|
fmt.Println("complex128 map should have 3 entries:", m)
|
|
}
|
|
m[nana] = "NaN"
|
|
m[nanb] = "NaN"
|
|
if len(m) != 5 {
|
|
fmt.Println("complex128 map should have 5 entries:", m)
|
|
}
|
|
}
|
|
}
|
|
|
|
func testnan() {
|
|
// Test that NaNs in maps don't go quadratic.
|
|
t := func(n int) time.Duration {
|
|
t0 := time.Now()
|
|
m := map[float64]int{}
|
|
nan := math.NaN()
|
|
for i := 0; i < n; i++ {
|
|
m[nan] = 1
|
|
}
|
|
if len(m) != n {
|
|
panic("wrong size map after nan insertion")
|
|
}
|
|
return time.Since(t0)
|
|
}
|
|
|
|
// Depending on the machine and OS, this test might be too fast
|
|
// to measure with accurate enough granularity. On failure,
|
|
// make it run longer, hoping that the timing granularity
|
|
// is eventually sufficient.
|
|
|
|
n := 30000 // 0.02 seconds on a MacBook Air
|
|
fails := 0
|
|
for {
|
|
t1 := t(n)
|
|
t2 := t(2 * n)
|
|
// should be 2x (linear); allow up to 3x
|
|
if t2 < 3*t1 {
|
|
return
|
|
}
|
|
fails++
|
|
if fails == 4 {
|
|
fmt.Printf("too slow: %d inserts: %v; %d inserts: %v\n", n, t1, 2*n, t2)
|
|
return
|
|
}
|
|
n *= 2
|
|
}
|
|
}
|