Initial commit: Go 1.23 release state
This commit is contained in:
Vorapol Rinsatitnon
494
test/range.go
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494
test/range.go
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@@ -0,0 +1,494 @@
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// 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 the 'for range' construct.
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package main
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// test range over channels
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func gen(c chan int, lo, hi int) {
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for i := lo; i <= hi; i++ {
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c <- i
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}
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close(c)
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}
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func seq(lo, hi int) chan int {
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c := make(chan int)
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go gen(c, lo, hi)
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return c
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}
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const alphabet = "abcdefghijklmnopqrstuvwxyz"
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func testblankvars() {
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n := 0
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for range alphabet {
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n++
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}
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if n != 26 {
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println("for range: wrong count", n, "want 26")
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panic("fail")
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}
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n = 0
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for _ = range alphabet {
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n++
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}
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if n != 26 {
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println("for _ = range: wrong count", n, "want 26")
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panic("fail")
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}
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n = 0
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for _, _ = range alphabet {
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n++
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}
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if n != 26 {
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println("for _, _ = range: wrong count", n, "want 26")
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panic("fail")
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}
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s := 0
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for i, _ := range alphabet {
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s += i
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}
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if s != 325 {
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println("for i, _ := range: wrong sum", s, "want 325")
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panic("fail")
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}
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r := rune(0)
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for _, v := range alphabet {
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r += v
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}
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if r != 2847 {
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println("for _, v := range: wrong sum", r, "want 2847")
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panic("fail")
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}
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}
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func testchan() {
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s := ""
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for i := range seq('a', 'z') {
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s += string(i)
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}
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if s != alphabet {
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println("Wanted lowercase alphabet; got", s)
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panic("fail")
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}
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n := 0
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for range seq('a', 'z') {
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n++
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}
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if n != 26 {
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println("testchan wrong count", n, "want 26")
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panic("fail")
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}
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}
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// test that range over slice only evaluates
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// the expression after "range" once.
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var nmake = 0
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func makeslice() []int {
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nmake++
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return []int{1, 2, 3, 4, 5}
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}
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func testslice() {
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s := 0
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nmake = 0
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for _, v := range makeslice() {
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s += v
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}
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if nmake != 1 {
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println("range called makeslice", nmake, "times")
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panic("fail")
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}
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if s != 15 {
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println("wrong sum ranging over makeslice", s)
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panic("fail")
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}
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x := []int{10, 20}
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y := []int{99}
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i := 1
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for i, x[i] = range y {
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break
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}
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if i != 0 || x[0] != 10 || x[1] != 99 {
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println("wrong parallel assignment", i, x[0], x[1])
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panic("fail")
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}
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}
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func testslice1() {
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s := 0
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nmake = 0
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for i := range makeslice() {
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s += i
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}
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if nmake != 1 {
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println("range called makeslice", nmake, "times")
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panic("fail")
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}
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if s != 10 {
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println("wrong sum ranging over makeslice", s)
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panic("fail")
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}
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}
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func testslice2() {
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n := 0
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nmake = 0
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for range makeslice() {
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n++
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}
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if nmake != 1 {
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println("range called makeslice", nmake, "times")
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panic("fail")
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}
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if n != 5 {
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println("wrong count ranging over makeslice", n)
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panic("fail")
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}
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}
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// test that range over []byte(string) only evaluates
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// the expression after "range" once.
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func makenumstring() string {
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nmake++
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return "\x01\x02\x03\x04\x05"
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}
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func testslice3() {
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s := byte(0)
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nmake = 0
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for _, v := range []byte(makenumstring()) {
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s += v
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}
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if nmake != 1 {
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println("range called makenumstring", nmake, "times")
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panic("fail")
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}
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if s != 15 {
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println("wrong sum ranging over []byte(makenumstring)", s)
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panic("fail")
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}
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}
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// test that range over array only evaluates
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// the expression after "range" once.
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func makearray() [5]int {
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nmake++
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return [5]int{1, 2, 3, 4, 5}
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}
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func testarray() {
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s := 0
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nmake = 0
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for _, v := range makearray() {
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s += v
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}
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if nmake != 1 {
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println("range called makearray", nmake, "times")
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panic("fail")
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}
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if s != 15 {
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println("wrong sum ranging over makearray", s)
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panic("fail")
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}
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}
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func testarray1() {
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s := 0
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nmake = 0
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for i := range makearray() {
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s += i
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}
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if nmake != 1 {
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println("range called makearray", nmake, "times")
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panic("fail")
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}
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if s != 10 {
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println("wrong sum ranging over makearray", s)
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panic("fail")
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}
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}
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func testarray2() {
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n := 0
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nmake = 0
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for range makearray() {
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n++
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}
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if nmake != 1 {
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println("range called makearray", nmake, "times")
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panic("fail")
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}
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if n != 5 {
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println("wrong count ranging over makearray", n)
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panic("fail")
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}
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}
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func makearrayptr() *[5]int {
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nmake++
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return &[5]int{1, 2, 3, 4, 5}
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}
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func testarrayptr() {
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nmake = 0
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x := len(makearrayptr())
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if x != 5 || nmake != 1 {
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println("len called makearrayptr", nmake, "times and got len", x)
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panic("fail")
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}
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nmake = 0
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x = cap(makearrayptr())
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if x != 5 || nmake != 1 {
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println("cap called makearrayptr", nmake, "times and got len", x)
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panic("fail")
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}
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s := 0
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nmake = 0
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for _, v := range makearrayptr() {
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s += v
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}
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if nmake != 1 {
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println("range called makearrayptr", nmake, "times")
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panic("fail")
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}
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if s != 15 {
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println("wrong sum ranging over makearrayptr", s)
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panic("fail")
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}
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}
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func testarrayptr1() {
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s := 0
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nmake = 0
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for i := range makearrayptr() {
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s += i
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}
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if nmake != 1 {
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println("range called makearrayptr", nmake, "times")
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panic("fail")
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}
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if s != 10 {
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println("wrong sum ranging over makearrayptr", s)
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panic("fail")
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}
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}
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func testarrayptr2() {
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n := 0
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nmake = 0
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for range makearrayptr() {
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n++
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}
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if nmake != 1 {
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println("range called makearrayptr", nmake, "times")
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panic("fail")
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}
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if n != 5 {
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println("wrong count ranging over makearrayptr", n)
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panic("fail")
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}
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}
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// test that range over string only evaluates
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// the expression after "range" once.
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func makestring() string {
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nmake++
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return "abcd☺"
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}
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func teststring() {
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var s rune
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nmake = 0
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for _, v := range makestring() {
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s += v
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}
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if nmake != 1 {
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println("range called makestring", nmake, "times")
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panic("fail")
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}
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if s != 'a'+'b'+'c'+'d'+'☺' {
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println("wrong sum ranging over makestring", s)
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panic("fail")
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}
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x := []rune{'a', 'b'}
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i := 1
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for i, x[i] = range "c" {
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break
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}
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if i != 0 || x[0] != 'a' || x[1] != 'c' {
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println("wrong parallel assignment", i, x[0], x[1])
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panic("fail")
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}
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y := []int{1, 2, 3}
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r := rune(1)
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for y[r], r = range "\x02" {
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break
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}
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if r != 2 || y[0] != 1 || y[1] != 0 || y[2] != 3 {
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println("wrong parallel assignment", r, y[0], y[1], y[2])
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panic("fail")
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}
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}
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func teststring1() {
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s := 0
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nmake = 0
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for i := range makestring() {
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s += i
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}
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if nmake != 1 {
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println("range called makestring", nmake, "times")
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panic("fail")
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}
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if s != 10 {
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println("wrong sum ranging over makestring", s)
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panic("fail")
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}
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}
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func teststring2() {
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n := 0
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nmake = 0
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for range makestring() {
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n++
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}
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if nmake != 1 {
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println("range called makestring", nmake, "times")
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panic("fail")
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}
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if n != 5 {
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println("wrong count ranging over makestring", n)
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panic("fail")
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}
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}
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// test that range over map only evaluates
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// the expression after "range" once.
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func makemap() map[int]int {
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nmake++
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return map[int]int{0: 'a', 1: 'b', 2: 'c', 3: 'd', 4: '☺'}
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}
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func testmap() {
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s := 0
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nmake = 0
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for _, v := range makemap() {
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s += v
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}
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if nmake != 1 {
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println("range called makemap", nmake, "times")
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panic("fail")
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}
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if s != 'a'+'b'+'c'+'d'+'☺' {
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println("wrong sum ranging over makemap", s)
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panic("fail")
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}
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}
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func testmap1() {
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s := 0
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nmake = 0
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for i := range makemap() {
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s += i
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}
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if nmake != 1 {
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println("range called makemap", nmake, "times")
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panic("fail")
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}
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if s != 10 {
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println("wrong sum ranging over makemap", s)
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panic("fail")
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}
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}
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func testmap2() {
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n := 0
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nmake = 0
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for range makemap() {
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n++
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}
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if nmake != 1 {
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println("range called makemap", nmake, "times")
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panic("fail")
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}
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if n != 5 {
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println("wrong count ranging over makemap", n)
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panic("fail")
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}
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}
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// test that range evaluates the index and value expressions
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// exactly once per iteration.
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var ncalls = 0
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func getvar(p *int) *int {
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ncalls++
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return p
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}
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func testcalls() {
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var i, v int
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si := 0
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sv := 0
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for *getvar(&i), *getvar(&v) = range [2]int{1, 2} {
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si += i
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sv += v
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}
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if ncalls != 4 {
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println("wrong number of calls:", ncalls, "!= 4")
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panic("fail")
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}
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if si != 1 || sv != 3 {
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println("wrong sum in testcalls", si, sv)
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panic("fail")
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}
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ncalls = 0
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for *getvar(&i), *getvar(&v) = range [0]int{} {
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println("loop ran on empty array")
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panic("fail")
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}
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if ncalls != 0 {
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println("wrong number of calls:", ncalls, "!= 0")
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panic("fail")
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}
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}
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func main() {
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testblankvars()
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testchan()
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testarray()
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testarray1()
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testarray2()
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testarrayptr()
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testarrayptr1()
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testarrayptr2()
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testslice()
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testslice1()
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testslice2()
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testslice3()
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teststring()
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teststring1()
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teststring2()
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testmap()
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testmap1()
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testmap2()
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testcalls()
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}
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Reference in New Issue
Block a user