libgo/go/flag/flag_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 flag_test
   6
   7 import (
   8         . "flag"
   9         "fmt"
  10         "testing"
  11 )
  12
  13 var (
  14         test_bool    = Bool("test_bool", false, "bool value")
  15         test_int     = Int("test_int", 0, "int value")
  16         test_int64   = Int64("test_int64", 0, "int64 value")
  17         test_uint    = Uint("test_uint", 0, "uint value")
  18         test_uint64  = Uint64("test_uint64", 0, "uint64 value")
  19         test_string  = String("test_string", "0", "string value")
  20         test_float   = Float("test_float", 0, "float value")
  21         test_float64 = Float("test_float64", 0, "float64 value")
  22 )
  23
  24 func boolString(s string) string {
  25         if s == "0" {
  26                 return "false"
  27         }
  28         return "true"
  29 }
  30
  31 func TestEverything(t *testing.T) {
  32         m := make(map[string]*Flag)
  33         desired := "0"
  34         visitor := func(f *Flag) {
  35                 if len(f.Name) > 5 && f.Name[0:5] == "test_" {
  36                         m[f.Name] = f
  37                         ok := false
  38                         switch {
  39                         case f.Value.String() == desired:
  40                                 ok = true
  41                         case f.Name == "test_bool" && f.Value.String() == boolString(desired):
  42                                 ok = true
  43                         }
  44                         if !ok {
  45                                 t.Error("Visit: bad value", f.Value.String(), "for", f.Name)
  46                         }
  47                 }
  48         }
  49         VisitAll(visitor)
  50         if len(m) != 8 {
  51                 t.Error("VisitAll misses some flags")
  52                 for k, v := range m {
  53                         t.Log(k, *v)
  54                 }
  55         }
  56         m = make(map[string]*Flag)
  57         Visit(visitor)
  58         if len(m) != 0 {
  59                 t.Errorf("Visit sees unset flags")
  60                 for k, v := range m {
  61                         t.Log(k, *v)
  62                 }
  63         }
  64         // Now set all flags
  65         Set("test_bool", "true")
  66         Set("test_int", "1")
  67         Set("test_int64", "1")
  68         Set("test_uint", "1")
  69         Set("test_uint64", "1")
  70         Set("test_string", "1")
  71         Set("test_float", "1")
  72         Set("test_float64", "1")
  73         desired = "1"
  74         Visit(visitor)
  75         if len(m) != 8 {
  76                 t.Error("Visit fails after set")
  77                 for k, v := range m {
  78                         t.Log(k, *v)
  79                 }
  80         }
  81 }
  82
  83 func TestUsage(t *testing.T) {
  84         called := false
  85         ResetForTesting(func() { called = true })
  86         if ParseForTesting([]string{"a.out", "-x"}) {
  87                 t.Error("parse did not fail for unknown flag")
  88         }
  89         if !called {
  90                 t.Error("did not call Usage for unknown flag")
  91         }
  92 }
  93
  94 func TestParse(t *testing.T) {
  95         ResetForTesting(func() { t.Error("bad parse") })
  96         boolFlag := Bool("bool", false, "bool value")
  97         bool2Flag := Bool("bool2", false, "bool2 value")
  98         intFlag := Int("int", 0, "int value")
  99         int64Flag := Int64("int64", 0, "int64 value")
 100         uintFlag := Uint("uint", 0, "uint value")
 101         uint64Flag := Uint64("uint64", 0, "uint64 value")
 102         stringFlag := String("string", "0", "string value")
 103         floatFlag := Float("float", 0, "float value")
 104         float64Flag := Float("float64", 0, "float64 value")
 105         extra := "one-extra-argument"
 106         args := []string{
 107                 "a.out",
 108                 "-bool",
 109                 "-bool2=true",
 110                 "--int", "22",
 111                 "--int64", "23",
 112                 "-uint", "24",
 113                 "--uint64", "25",
 114                 "-string", "hello",
 115                 "--float", "3141.5",
 116                 "-float64", "2718e28",
 117                 extra,
 118         }
 119         if !ParseForTesting(args) {
 120                 t.Fatal("parse failed")
 121         }
 122         if *boolFlag != true {
 123                 t.Error("bool flag should be true, is ", *boolFlag)
 124         }
 125         if *bool2Flag != true {
 126                 t.Error("bool2 flag should be true, is ", *bool2Flag)
 127         }
 128         if *intFlag != 22 {
 129                 t.Error("int flag should be 22, is ", *intFlag)
 130         }
 131         if *int64Flag != 23 {
 132                 t.Error("int64 flag should be 23, is ", *int64Flag)
 133         }
 134         if *uintFlag != 24 {
 135                 t.Error("uint flag should be 24, is ", *uintFlag)
 136         }
 137         if *uint64Flag != 25 {
 138                 t.Error("uint64 flag should be 25, is ", *uint64Flag)
 139         }
 140         if *stringFlag != "hello" {
 141                 t.Error("string flag should be `hello`, is ", *stringFlag)
 142         }
 143         if *floatFlag != 3141.5 {
 144                 t.Error("float flag should be 3141.5, is ", *floatFlag)
 145         }
 146         if *float64Flag != 2718e28 {
 147                 t.Error("float64 flag should be 2718e28, is ", *float64Flag)
 148         }
 149         if len(Args()) != 1 {
 150                 t.Error("expected one argument, got", len(Args()))
 151         } else if Args()[0] != extra {
 152                 t.Errorf("expected argument %q got %q", extra, Args()[0])
 153         }
 154 }
 155
 156 // Declare a user-defined flag.
 157 type flagVar []string
 158
 159 func (f *flagVar) String() string {
 160         return fmt.Sprint([]string(*f))
 161 }
 162
 163 func (f *flagVar) Set(value string) bool {
 164         *f = append(*f, value)
 165         return true
 166 }
 167
 168 func TestUserDefined(t *testing.T) {
 169         ResetForTesting(func() { t.Fatal("bad parse") })
 170         var v flagVar
 171         Var(&v, "v", "usage")
 172         if !ParseForTesting([]string{"a.out", "-v", "1", "-v", "2", "-v=3"}) {
 173                 t.Error("parse failed")
 174         }
 175         if len(v) != 3 {
 176                 t.Fatal("expected 3 args; got ", len(v))
 177         }
 178         expect := "[1 2 3]"
 179         if v.String() != expect {
 180                 t.Errorf("expected value %q got %q", expect, v.String())
 181         }
 182 }