parse_test.go

     1  // Copyright 2009 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package net
     6  
     7  import (
     8  	"bufio"
     9  	"os"
    10  	"runtime"
    11  	"testing"
    12  )
    13  
    14  func TestReadLine(t *testing.T) {
    15  	// /etc/services file does not exist on android, plan9, windows, or wasip1
    16  	// where it would be required to be mounted from the host file system.
    17  	switch runtime.GOOS {
    18  	case "android", "plan9", "windows", "wasip1":
    19  		t.Skipf("not supported on %s", runtime.GOOS)
    20  	}
    21  	filename := "/etc/services" // a nice big file
    22  
    23  	fd, err := os.Open(filename)
    24  	if err != nil {
    25  		// The file is missing even on some Unix systems.
    26  		t.Skipf("skipping because failed to open /etc/services: %v", err)
    27  	}
    28  	defer fd.Close()
    29  	br := bufio.NewReader(fd)
    30  
    31  	file, err := open(filename)
    32  	if file == nil {
    33  		t.Fatal(err)
    34  	}
    35  	defer file.close()
    36  
    37  	lineno := 1
    38  	byteno := 0
    39  	for {
    40  		bline, berr := br.ReadString('\n')
    41  		if n := len(bline); n > 0 {
    42  			bline = bline[0 : n-1]
    43  		}
    44  		line, ok := file.readLine()
    45  		if (berr != nil) != !ok || bline != line {
    46  			t.Fatalf("%s:%d (#%d)\nbufio => %q, %v\nnet => %q, %v", filename, lineno, byteno, bline, berr, line, ok)
    47  		}
    48  		if !ok {
    49  			break
    50  		}
    51  		lineno++
    52  		byteno += len(line) + 1
    53  	}
    54  }
    55  
    56  func TestDtoi(t *testing.T) {
    57  	for _, tt := range []struct {
    58  		in  string
    59  		out int
    60  		off int
    61  		ok  bool
    62  	}{
    63  		{"", 0, 0, false},
    64  		{"0", 0, 1, true},
    65  		{"65536", 65536, 5, true},
    66  		{"123456789", big, 8, false},
    67  		{"-0", 0, 0, false},
    68  		{"-1234", 0, 0, false},
    69  	} {
    70  		n, i, ok := dtoi(tt.in)
    71  		if n != tt.out || i != tt.off || ok != tt.ok {
    72  			t.Errorf("got %d, %d, %v; want %d, %d, %v", n, i, ok, tt.out, tt.off, tt.ok)
    73  		}
    74  	}
    75  }
    76
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