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https://github.com/golang/go
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b615ad8fd5
GODEBUG=netdns=1 prints a one-time strategy decision. (cgo or go DNS lookups) GODEBUG=netdns=2 prints the per-lookup strategy as a function of the hostname. The new "netcgo" build tag forces cgo DNS lookups. GODEBUG=netdns=go (or existing build tag "netgo") forces Go DNS resolution. GODEBUG=netdns=cgo (or new build tag "netcgo") forces libc DNS resolution. Options can be combined with e.g. GODEBUG=netdns=go+1 or GODEBUG=netdns=2+cgo. Fixes #11322 Fixes #11450 Change-Id: I7a67e9f759fd0a02320e7803f9ded1638b19e861 Reviewed-on: https://go-review.googlesource.com/11584 Reviewed-by: Russ Cox <rsc@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
80 lines
1.7 KiB
Go
80 lines
1.7 KiB
Go
// 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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package net
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import (
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"bufio"
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"os"
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"runtime"
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"testing"
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)
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func TestReadLine(t *testing.T) {
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// /etc/services file does not exist on android, plan9, windows.
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switch runtime.GOOS {
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case "android", "plan9", "windows":
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t.Skipf("not supported on %s", runtime.GOOS)
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}
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filename := "/etc/services" // a nice big file
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fd, err := os.Open(filename)
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if err != nil {
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t.Fatal(err)
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}
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defer fd.Close()
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br := bufio.NewReader(fd)
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file, err := open(filename)
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if file == nil {
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t.Fatal(err)
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}
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defer file.close()
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lineno := 1
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byteno := 0
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for {
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bline, berr := br.ReadString('\n')
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if n := len(bline); n > 0 {
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bline = bline[0 : n-1]
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}
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line, ok := file.readLine()
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if (berr != nil) != !ok || bline != line {
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t.Fatalf("%s:%d (#%d)\nbufio => %q, %v\nnet => %q, %v", filename, lineno, byteno, bline, berr, line, ok)
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}
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if !ok {
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break
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}
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lineno++
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byteno += len(line) + 1
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}
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}
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func TestGoDebugString(t *testing.T) {
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defer os.Setenv("GODEBUG", os.Getenv("GODEBUG"))
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tests := []struct {
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godebug string
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key string
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want string
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}{
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{"", "foo", ""},
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{"foo=", "foo", ""},
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{"foo=bar", "foo", "bar"},
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{"foo=bar,", "foo", "bar"},
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{"foo,foo=bar,", "foo", "bar"},
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{"foo1=bar,foo=bar,", "foo", "bar"},
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{"foo=bar,foo=bar,", "foo", "bar"},
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{"foo=", "foo", ""},
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{"foo", "foo", ""},
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{",foo", "foo", ""},
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{"foo=bar,baz", "loooooooong", ""},
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}
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for _, tt := range tests {
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os.Setenv("GODEBUG", tt.godebug)
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if got := goDebugString(tt.key); got != tt.want {
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t.Errorf("for %q, goDebugString(%q) = %q; want %q", tt.godebug, tt.key, got, tt.want)
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}
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}
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}
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