528 lines
14 KiB
Go
528 lines
14 KiB
Go
// Copyright 2014 The Docker & 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 mflag_test
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import (
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"bytes"
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"fmt"
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. "github.com/docker/docker/pkg/mflag"
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"os"
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"sort"
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"strings"
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"testing"
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"time"
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)
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// ResetForTesting clears all flag state and sets the usage function as directed.
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// After calling ResetForTesting, parse errors in flag handling will not
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// exit the program.
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func ResetForTesting(usage func()) {
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CommandLine = NewFlagSet(os.Args[0], ContinueOnError)
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Usage = usage
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}
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func boolString(s string) string {
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if s == "0" {
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return "false"
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}
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return "true"
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}
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func TestEverything(t *testing.T) {
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ResetForTesting(nil)
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Bool([]string{"test_bool"}, false, "bool value")
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Int([]string{"test_int"}, 0, "int value")
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Int64([]string{"test_int64"}, 0, "int64 value")
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Uint([]string{"test_uint"}, 0, "uint value")
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Uint64([]string{"test_uint64"}, 0, "uint64 value")
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String([]string{"test_string"}, "0", "string value")
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Float64([]string{"test_float64"}, 0, "float64 value")
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Duration([]string{"test_duration"}, 0, "time.Duration value")
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m := make(map[string]*Flag)
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desired := "0"
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visitor := func(f *Flag) {
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for _, name := range f.Names {
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if len(name) > 5 && name[0:5] == "test_" {
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m[name] = f
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ok := false
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switch {
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case f.Value.String() == desired:
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ok = true
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case name == "test_bool" && f.Value.String() == boolString(desired):
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ok = true
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case name == "test_duration" && f.Value.String() == desired+"s":
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ok = true
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}
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if !ok {
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t.Error("Visit: bad value", f.Value.String(), "for", name)
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}
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}
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}
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}
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VisitAll(visitor)
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if len(m) != 8 {
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t.Error("VisitAll misses some flags")
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for k, v := range m {
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t.Log(k, *v)
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}
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}
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m = make(map[string]*Flag)
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Visit(visitor)
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if len(m) != 0 {
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t.Errorf("Visit sees unset flags")
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for k, v := range m {
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t.Log(k, *v)
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}
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}
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// Now set all flags
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Set("test_bool", "true")
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Set("test_int", "1")
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Set("test_int64", "1")
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Set("test_uint", "1")
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Set("test_uint64", "1")
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Set("test_string", "1")
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Set("test_float64", "1")
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Set("test_duration", "1s")
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desired = "1"
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Visit(visitor)
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if len(m) != 8 {
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t.Error("Visit fails after set")
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for k, v := range m {
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t.Log(k, *v)
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}
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}
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// Now test they're visited in sort order.
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var flagNames []string
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Visit(func(f *Flag) {
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for _, name := range f.Names {
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flagNames = append(flagNames, name)
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}
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})
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if !sort.StringsAreSorted(flagNames) {
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t.Errorf("flag names not sorted: %v", flagNames)
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}
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}
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func TestGet(t *testing.T) {
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ResetForTesting(nil)
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Bool([]string{"test_bool"}, true, "bool value")
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Int([]string{"test_int"}, 1, "int value")
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Int64([]string{"test_int64"}, 2, "int64 value")
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Uint([]string{"test_uint"}, 3, "uint value")
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Uint64([]string{"test_uint64"}, 4, "uint64 value")
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String([]string{"test_string"}, "5", "string value")
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Float64([]string{"test_float64"}, 6, "float64 value")
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Duration([]string{"test_duration"}, 7, "time.Duration value")
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visitor := func(f *Flag) {
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for _, name := range f.Names {
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if len(name) > 5 && name[0:5] == "test_" {
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g, ok := f.Value.(Getter)
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if !ok {
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t.Errorf("Visit: value does not satisfy Getter: %T", f.Value)
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return
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}
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switch name {
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case "test_bool":
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ok = g.Get() == true
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case "test_int":
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ok = g.Get() == int(1)
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case "test_int64":
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ok = g.Get() == int64(2)
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case "test_uint":
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ok = g.Get() == uint(3)
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case "test_uint64":
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ok = g.Get() == uint64(4)
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case "test_string":
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ok = g.Get() == "5"
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case "test_float64":
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ok = g.Get() == float64(6)
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case "test_duration":
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ok = g.Get() == time.Duration(7)
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}
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if !ok {
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t.Errorf("Visit: bad value %T(%v) for %s", g.Get(), g.Get(), name)
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}
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}
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}
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}
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VisitAll(visitor)
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}
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func TestUsage(t *testing.T) {
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called := false
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ResetForTesting(func() { called = true })
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if CommandLine.Parse([]string{"-x"}) == nil {
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t.Error("parse did not fail for unknown flag")
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}
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if !called {
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t.Error("did not call Usage for unknown flag")
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}
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}
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func testParse(f *FlagSet, t *testing.T) {
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if f.Parsed() {
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t.Error("f.Parse() = true before Parse")
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}
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boolFlag := f.Bool([]string{"bool"}, false, "bool value")
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bool2Flag := f.Bool([]string{"bool2"}, false, "bool2 value")
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f.Bool([]string{"bool3"}, false, "bool3 value")
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bool4Flag := f.Bool([]string{"bool4"}, false, "bool4 value")
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intFlag := f.Int([]string{"-int"}, 0, "int value")
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int64Flag := f.Int64([]string{"-int64"}, 0, "int64 value")
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uintFlag := f.Uint([]string{"uint"}, 0, "uint value")
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uint64Flag := f.Uint64([]string{"-uint64"}, 0, "uint64 value")
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stringFlag := f.String([]string{"string"}, "0", "string value")
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f.String([]string{"string2"}, "0", "string2 value")
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singleQuoteFlag := f.String([]string{"squote"}, "", "single quoted value")
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doubleQuoteFlag := f.String([]string{"dquote"}, "", "double quoted value")
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mixedQuoteFlag := f.String([]string{"mquote"}, "", "mixed quoted value")
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mixed2QuoteFlag := f.String([]string{"mquote2"}, "", "mixed2 quoted value")
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nestedQuoteFlag := f.String([]string{"nquote"}, "", "nested quoted value")
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nested2QuoteFlag := f.String([]string{"nquote2"}, "", "nested2 quoted value")
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float64Flag := f.Float64([]string{"float64"}, 0, "float64 value")
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durationFlag := f.Duration([]string{"duration"}, 5*time.Second, "time.Duration value")
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extra := "one-extra-argument"
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args := []string{
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"-bool",
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"-bool2=true",
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"-bool4=false",
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"--int", "22",
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"--int64", "0x23",
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"-uint", "24",
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"--uint64", "25",
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"-string", "hello",
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"-squote='single'",
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`-dquote="double"`,
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`-mquote='mixed"`,
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`-mquote2="mixed2'`,
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`-nquote="'single nested'"`,
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`-nquote2='"double nested"'`,
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"-float64", "2718e28",
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"-duration", "2m",
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extra,
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}
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if err := f.Parse(args); err != nil {
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t.Fatal(err)
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}
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if !f.Parsed() {
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t.Error("f.Parse() = false after Parse")
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}
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if *boolFlag != true {
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t.Error("bool flag should be true, is ", *boolFlag)
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}
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if *bool2Flag != true {
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t.Error("bool2 flag should be true, is ", *bool2Flag)
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}
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if !f.IsSet("bool2") {
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t.Error("bool2 should be marked as set")
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}
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if f.IsSet("bool3") {
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t.Error("bool3 should not be marked as set")
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}
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if !f.IsSet("bool4") {
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t.Error("bool4 should be marked as set")
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}
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if *bool4Flag != false {
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t.Error("bool4 flag should be false, is ", *bool4Flag)
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}
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if *intFlag != 22 {
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t.Error("int flag should be 22, is ", *intFlag)
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}
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if *int64Flag != 0x23 {
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t.Error("int64 flag should be 0x23, is ", *int64Flag)
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}
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if *uintFlag != 24 {
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t.Error("uint flag should be 24, is ", *uintFlag)
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}
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if *uint64Flag != 25 {
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t.Error("uint64 flag should be 25, is ", *uint64Flag)
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}
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if *stringFlag != "hello" {
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t.Error("string flag should be `hello`, is ", *stringFlag)
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}
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if !f.IsSet("string") {
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t.Error("string flag should be marked as set")
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}
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if f.IsSet("string2") {
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t.Error("string2 flag should not be marked as set")
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}
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if *singleQuoteFlag != "single" {
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t.Error("single quote string flag should be `single`, is ", *singleQuoteFlag)
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}
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if *doubleQuoteFlag != "double" {
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t.Error("double quote string flag should be `double`, is ", *doubleQuoteFlag)
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}
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if *mixedQuoteFlag != `'mixed"` {
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t.Error("mixed quote string flag should be `'mixed\"`, is ", *mixedQuoteFlag)
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}
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if *mixed2QuoteFlag != `"mixed2'` {
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t.Error("mixed2 quote string flag should be `\"mixed2'`, is ", *mixed2QuoteFlag)
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}
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if *nestedQuoteFlag != "'single nested'" {
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t.Error("nested quote string flag should be `'single nested'`, is ", *nestedQuoteFlag)
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}
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if *nested2QuoteFlag != `"double nested"` {
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t.Error("double quote string flag should be `\"double nested\"`, is ", *nested2QuoteFlag)
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}
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if *float64Flag != 2718e28 {
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t.Error("float64 flag should be 2718e28, is ", *float64Flag)
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}
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if *durationFlag != 2*time.Minute {
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t.Error("duration flag should be 2m, is ", *durationFlag)
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}
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if len(f.Args()) != 1 {
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t.Error("expected one argument, got", len(f.Args()))
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} else if f.Args()[0] != extra {
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t.Errorf("expected argument %q got %q", extra, f.Args()[0])
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}
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}
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func testPanic(f *FlagSet, t *testing.T) {
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f.Int([]string{"-int"}, 0, "int value")
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if f.Parsed() {
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t.Error("f.Parse() = true before Parse")
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}
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args := []string{
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"-int", "21",
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}
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f.Parse(args)
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}
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func TestParsePanic(t *testing.T) {
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ResetForTesting(func() {})
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testPanic(CommandLine, t)
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}
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func TestParse(t *testing.T) {
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ResetForTesting(func() { t.Error("bad parse") })
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testParse(CommandLine, t)
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}
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func TestFlagSetParse(t *testing.T) {
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testParse(NewFlagSet("test", ContinueOnError), t)
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}
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// Declare a user-defined flag type.
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type flagVar []string
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func (f *flagVar) String() string {
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return fmt.Sprint([]string(*f))
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}
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func (f *flagVar) Set(value string) error {
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*f = append(*f, value)
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return nil
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}
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func TestUserDefined(t *testing.T) {
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var flags FlagSet
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flags.Init("test", ContinueOnError)
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var v flagVar
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flags.Var(&v, []string{"v"}, "usage")
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if err := flags.Parse([]string{"-v", "1", "-v", "2", "-v=3"}); err != nil {
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t.Error(err)
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}
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if len(v) != 3 {
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t.Fatal("expected 3 args; got ", len(v))
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}
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expect := "[1 2 3]"
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if v.String() != expect {
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t.Errorf("expected value %q got %q", expect, v.String())
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}
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}
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// Declare a user-defined boolean flag type.
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type boolFlagVar struct {
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count int
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}
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func (b *boolFlagVar) String() string {
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return fmt.Sprintf("%d", b.count)
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}
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func (b *boolFlagVar) Set(value string) error {
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if value == "true" {
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b.count++
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}
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return nil
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}
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func (b *boolFlagVar) IsBoolFlag() bool {
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return b.count < 4
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}
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func TestUserDefinedBool(t *testing.T) {
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var flags FlagSet
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flags.Init("test", ContinueOnError)
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var b boolFlagVar
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var err error
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flags.Var(&b, []string{"b"}, "usage")
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if err = flags.Parse([]string{"-b", "-b", "-b", "-b=true", "-b=false", "-b", "barg", "-b"}); err != nil {
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if b.count < 4 {
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t.Error(err)
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}
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}
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if b.count != 4 {
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t.Errorf("want: %d; got: %d", 4, b.count)
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}
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if err == nil {
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t.Error("expected error; got none")
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}
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}
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func TestSetOutput(t *testing.T) {
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var flags FlagSet
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var buf bytes.Buffer
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flags.SetOutput(&buf)
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flags.Init("test", ContinueOnError)
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flags.Parse([]string{"-unknown"})
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if out := buf.String(); !strings.Contains(out, "-unknown") {
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t.Logf("expected output mentioning unknown; got %q", out)
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}
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}
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// This tests that one can reset the flags. This still works but not well, and is
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// superseded by FlagSet.
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func TestChangingArgs(t *testing.T) {
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ResetForTesting(func() { t.Fatal("bad parse") })
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oldArgs := os.Args
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defer func() { os.Args = oldArgs }()
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os.Args = []string{"cmd", "-before", "subcmd", "-after", "args"}
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before := Bool([]string{"before"}, false, "")
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if err := CommandLine.Parse(os.Args[1:]); err != nil {
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t.Fatal(err)
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}
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cmd := Arg(0)
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os.Args = Args()
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after := Bool([]string{"after"}, false, "")
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Parse()
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args := Args()
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if !*before || cmd != "subcmd" || !*after || len(args) != 1 || args[0] != "args" {
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t.Fatalf("expected true subcmd true [args] got %v %v %v %v", *before, cmd, *after, args)
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}
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}
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// Test that -help invokes the usage message and returns ErrHelp.
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func TestHelp(t *testing.T) {
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var helpCalled = false
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fs := NewFlagSet("help test", ContinueOnError)
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fs.Usage = func() { helpCalled = true }
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var flag bool
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fs.BoolVar(&flag, []string{"flag"}, false, "regular flag")
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// Regular flag invocation should work
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err := fs.Parse([]string{"-flag=true"})
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if err != nil {
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t.Fatal("expected no error; got ", err)
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}
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if !flag {
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t.Error("flag was not set by -flag")
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}
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if helpCalled {
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t.Error("help called for regular flag")
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helpCalled = false // reset for next test
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}
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// Help flag should work as expected.
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err = fs.Parse([]string{"-help"})
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if err == nil {
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t.Fatal("error expected")
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}
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if err != ErrHelp {
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t.Fatal("expected ErrHelp; got ", err)
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}
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if !helpCalled {
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t.Fatal("help was not called")
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}
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// If we define a help flag, that should override.
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var help bool
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fs.BoolVar(&help, []string{"help"}, false, "help flag")
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helpCalled = false
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err = fs.Parse([]string{"-help"})
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if err != nil {
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t.Fatal("expected no error for defined -help; got ", err)
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}
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if helpCalled {
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t.Fatal("help was called; should not have been for defined help flag")
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}
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}
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// Test the flag count functions.
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func TestFlagCounts(t *testing.T) {
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fs := NewFlagSet("help test", ContinueOnError)
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var flag bool
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fs.BoolVar(&flag, []string{"flag1"}, false, "regular flag")
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fs.BoolVar(&flag, []string{"#deprecated1"}, false, "regular flag")
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fs.BoolVar(&flag, []string{"f", "flag2"}, false, "regular flag")
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fs.BoolVar(&flag, []string{"#d", "#deprecated2"}, false, "regular flag")
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fs.BoolVar(&flag, []string{"flag3"}, false, "regular flag")
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fs.BoolVar(&flag, []string{"g", "#flag4", "-flag4"}, false, "regular flag")
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if fs.FlagCount() != 6 {
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t.Fatal("FlagCount wrong. ", fs.FlagCount())
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}
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if fs.FlagCountUndeprecated() != 4 {
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t.Fatal("FlagCountUndeprecated wrong. ", fs.FlagCountUndeprecated())
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}
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if fs.NFlag() != 0 {
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t.Fatal("NFlag wrong. ", fs.NFlag())
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}
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err := fs.Parse([]string{"-fd", "-g", "-flag4"})
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if err != nil {
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t.Fatal("expected no error for defined -help; got ", err)
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}
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if fs.NFlag() != 4 {
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t.Fatal("NFlag wrong. ", fs.NFlag())
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}
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}
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// Show up bug in sortFlags
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func TestSortFlags(t *testing.T) {
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fs := NewFlagSet("help TestSortFlags", ContinueOnError)
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var err error
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var b bool
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fs.BoolVar(&b, []string{"b", "-banana"}, false, "usage")
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err = fs.Parse([]string{"--banana=true"})
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if err != nil {
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t.Fatal("expected no error; got ", err)
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}
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count := 0
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fs.VisitAll(func(flag *Flag) {
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count++
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if flag == nil {
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t.Fatal("VisitAll should not return a nil flag")
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}
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})
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flagcount := fs.FlagCount()
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if flagcount != count {
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t.Fatalf("FlagCount (%d) != number (%d) of elements visited", flagcount, count)
|
|
}
|
|
// Make sure its idempotent
|
|
if flagcount != fs.FlagCount() {
|
|
t.Fatalf("FlagCount (%d) != fs.FlagCount() (%d) of elements visited", flagcount, fs.FlagCount())
|
|
}
|
|
|
|
count = 0
|
|
fs.Visit(func(flag *Flag) {
|
|
count++
|
|
if flag == nil {
|
|
t.Fatal("Visit should not return a nil flag")
|
|
}
|
|
})
|
|
nflag := fs.NFlag()
|
|
if nflag != count {
|
|
t.Fatalf("NFlag (%d) != number (%d) of elements visited", nflag, count)
|
|
}
|
|
if nflag != fs.NFlag() {
|
|
t.Fatalf("NFlag (%d) != fs.NFlag() (%d) of elements visited", nflag, fs.NFlag())
|
|
}
|
|
}
|