extras_test.go 6.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package flag_test

import (
	"os"
	"syscall"
	"testing"
	"time"

	. "github.com/namsral/flag"
)

// Test parsing a environment variables
func TestParseEnv(t *testing.T) {

	syscall.Setenv("BOOL", "")
	syscall.Setenv("BOOL2", "true")
	syscall.Setenv("INT", "22")
	syscall.Setenv("INT64", "0x23")
	syscall.Setenv("UINT", "24")
	syscall.Setenv("UINT64", "25")
	syscall.Setenv("STRING", "hello")
	syscall.Setenv("FLOAT64", "2718e28")
	syscall.Setenv("DURATION", "2m")

	f := NewFlagSet(os.Args[0], ContinueOnError)

	boolFlag := f.Bool("bool", false, "bool value")
	bool2Flag := f.Bool("bool2", false, "bool2 value")
	intFlag := f.Int("int", 0, "int value")
	int64Flag := f.Int64("int64", 0, "int64 value")
	uintFlag := f.Uint("uint", 0, "uint value")
	uint64Flag := f.Uint64("uint64", 0, "uint64 value")
	stringFlag := f.String("string", "0", "string value")
	float64Flag := f.Float64("float64", 0, "float64 value")
	durationFlag := f.Duration("duration", 5*time.Second, "time.Duration value")

	err := f.ParseEnv(os.Environ())
	if err != nil {
		t.Fatal("expected no error; got ", err)
	}
	if *boolFlag != true {
		t.Error("bool flag should be true, is ", *boolFlag)
	}
	if *bool2Flag != true {
		t.Error("bool2 flag should be true, is ", *bool2Flag)
	}
	if *intFlag != 22 {
		t.Error("int flag should be 22, is ", *intFlag)
	}
	if *int64Flag != 0x23 {
		t.Error("int64 flag should be 0x23, is ", *int64Flag)
	}
	if *uintFlag != 24 {
		t.Error("uint flag should be 24, is ", *uintFlag)
	}
	if *uint64Flag != 25 {
		t.Error("uint64 flag should be 25, is ", *uint64Flag)
	}
	if *stringFlag != "hello" {
		t.Error("string flag should be `hello`, is ", *stringFlag)
	}
	if *float64Flag != 2718e28 {
		t.Error("float64 flag should be 2718e28, is ", *float64Flag)
	}
	if *durationFlag != 2*time.Minute {
		t.Error("duration flag should be 2m, is ", *durationFlag)
	}
}

// Test parsing a configuration file
func TestParseFile(t *testing.T) {

	f := NewFlagSet(os.Args[0], ContinueOnError)

	boolFlag := f.Bool("bool", false, "bool value")
	bool2Flag := f.Bool("bool2", false, "bool2 value")
	intFlag := f.Int("int", 0, "int value")
	int64Flag := f.Int64("int64", 0, "int64 value")
	uintFlag := f.Uint("uint", 0, "uint value")
	uint64Flag := f.Uint64("uint64", 0, "uint64 value")
	stringFlag := f.String("string", "0", "string value")
	float64Flag := f.Float64("float64", 0, "float64 value")
	durationFlag := f.Duration("duration", 5*time.Second, "time.Duration value")

	err := f.ParseFile("./testdata/test.conf")
	if err != nil {
		t.Fatal("expected no error; got ", err)
	}
	if *boolFlag != true {
		t.Error("bool flag should be true, is ", *boolFlag)
	}
	if *bool2Flag != true {
		t.Error("bool2 flag should be true, is ", *bool2Flag)
	}
	if *intFlag != 22 {
		t.Error("int flag should be 22, is ", *intFlag)
	}
	if *int64Flag != 0x23 {
		t.Error("int64 flag should be 0x23, is ", *int64Flag)
	}
	if *uintFlag != 24 {
		t.Error("uint flag should be 24, is ", *uintFlag)
	}
	if *uint64Flag != 25 {
		t.Error("uint64 flag should be 25, is ", *uint64Flag)
	}
	if *stringFlag != "hello" {
		t.Error("string flag should be `hello`, is ", *stringFlag)
	}
	if *float64Flag != 2718e28 {
		t.Error("float64 flag should be 2718e28, is ", *float64Flag)
	}
	if *durationFlag != 2*time.Minute {
		t.Error("duration flag should be 2m, is ", *durationFlag)
	}
}

func TestParseFileUnknownFlag(t *testing.T) {
	f := NewFlagSet("test", ContinueOnError)
	if err := f.ParseFile("./testdata/bad_test.conf"); err == nil {
		t.Error("parse did not fail for unknown flag; ", err)
	}
}

func TestDefaultConfigFlagname(t *testing.T) {
	f := NewFlagSet("test", ContinueOnError)

	f.Bool("bool", false, "bool value")
	f.Bool("bool2", false, "bool2 value")
	f.Int("int", 0, "int value")
	f.Int64("int64", 0, "int64 value")
	f.Uint("uint", 0, "uint value")
	f.Uint64("uint64", 0, "uint64 value")
	stringFlag := f.String("string", "0", "string value")
	f.Float64("float64", 0, "float64 value")
	f.Duration("duration", 5*time.Second, "time.Duration value")

	f.String(DefaultConfigFlagname, "./testdata/test.conf", "config path")

	if err := os.Unsetenv("STRING"); err != nil {
		t.Error(err)
	}

	if err := f.Parse([]string{}); err != nil {
		t.Error("parse failed; ", err)
	}

	if *stringFlag != "hello" {
		t.Error("string flag should be `hello`, is", *stringFlag)
	}
}

func TestDefaultConfigFlagnameMissingFile(t *testing.T) {
	f := NewFlagSet("test", ContinueOnError)
	f.String(DefaultConfigFlagname, "./testdata/missing", "config path")

	if err := os.Unsetenv("STRING"); err != nil {
		t.Error(err)
	}
	if err := f.Parse([]string{}); err == nil {
		t.Error("expected error of missing config file, got nil")
	}
}

func TestFlagSetParseErrors(t *testing.T) {
	fs := NewFlagSet("test", ContinueOnError)
	fs.Int("int", 0, "int value")

	args := []string{"-int", "bad"}
	expected := `invalid value "bad" for flag -int: strconv.ParseInt: parsing "bad": invalid syntax`
	if err := fs.Parse(args); err == nil || err.Error() != expected {
		t.Errorf("expected error %q parsing from args, got: %v", expected, err)
	}

	if err := os.Setenv("INT", "bad"); err != nil {
		t.Fatalf("error setting env: %s", err.Error())
	}
	expected = `invalid value "bad" for environment variable int: strconv.ParseInt: parsing "bad": invalid syntax`
	if err := fs.Parse([]string{}); err == nil || err.Error() != expected {
		t.Errorf("expected error %q parsing from env, got: %v", expected, err)
	}
	if err := os.Unsetenv("INT"); err != nil {
		t.Fatalf("error unsetting env: %s", err.Error())
	}

	fs.String("config", "", "config filename")
	args = []string{"-config", "testdata/bad_test.conf"}
	expected = `invalid value "bad" for configuration variable int: strconv.ParseInt: parsing "bad": invalid syntax`
	if err := fs.Parse(args); err == nil || err.Error() != expected {
		t.Errorf("expected error %q parsing from config, got: %v", expected, err)
	}
}

func TestTestingPackageFlags(t *testing.T) {
	f := NewFlagSet("test", ContinueOnError)
	if err := f.Parse([]string{"-test.v", "-test.count", "1"}); err != nil {
		t.Error(err)
	}
}