~mna/webparts-flag

ref: 306cfcede5b817c470e3564493265d6125d97956 webparts-flag/flag_test.go -rw-r--r-- 3.2 KiB
306cfcedMartin Angers implement parsing with and without env vars 1 year, 7 months ago
                                                                                
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package flag

import (
	"strings"
	"testing"
	"time"

	"github.com/stretchr/testify/require"
)

type F struct {
	S     string        `flag:"s,string,long-string"`
	I     int           `flag:"i,int"`
	B     bool          `flag:"b"`
	H     bool          `flag:"h,help"`
	T     time.Duration `flag:"t"`
	N     int
	args  []string
	flags map[string]bool
}

func (f *F) SetArgs(args []string) {
	f.args = args
}

func (f *F) SetFlags(flags map[string]bool) {
	f.flags = flags
}

func TestParseFlags(t *testing.T) {
	cases := []struct {
		args []string
		want *F
		err  string
	}{
		{
			want: &F{},
		},
		{
			args: []string{"toto"},
			want: &F{
				args: []string{"toto"},
			},
		},
		{
			args: []string{"-h"},
			want: &F{
				H:     true,
				flags: map[string]bool{"h": true},
			},
		},
		{
			args: []string{"-i", "10", "--int", "20"},
			want: &F{
				I:     20,
				flags: map[string]bool{"i": true, "int": true},
			},
		},
		{
			args: []string{"-i", "10", "--int", "20"},
			want: &F{
				I:     20,
				flags: map[string]bool{"i": true, "int": true},
			},
		},
		{
			args: []string{"-s", "a", "--string", "b", "-long-string", "c"},
			want: &F{
				S:     "c",
				flags: map[string]bool{"s": true, "string": true, "long-string": true},
			},
		},
		{
			args: []string{"-b", "--b", "-b"},
			want: &F{
				B:     true,
				flags: map[string]bool{"b": true},
			},
		},
		{
			args: []string{"-b", "-int", "1", "-string", "a", "arg1", "arg2"},
			want: &F{
				B:     true,
				I:     1,
				S:     "a",
				args:  []string{"arg1", "arg2"},
				flags: map[string]bool{"b": true, "int": true, "string": true},
			},
		},
		{
			args: []string{"-n", "1"},
			want: &F{},
			err:  "not defined: -n",
		},
		{
			args: []string{"-t", "3s"},
			want: &F{
				T:     3 * time.Second,
				flags: map[string]bool{"t": true},
			},
		},
		{
			args: []string{"-t", "nope"},
			want: &F{},
			err:  "invalid value",
		},
	}

	var p Parser
	for _, c := range cases {
		t.Run(strings.Join(c.args, " "), func(t *testing.T) {
			var f F
			err := p.Parse(c.args, &f)

			if c.err != "" {
				require.Error(t, err)
				require.Contains(t, err.Error(), c.err)
				return
			}

			require.NoError(t, err)
			require.Equal(t, c.want, &f)
		})
	}
}

func TestParseNoFlag(t *testing.T) {
	type F struct {
		V int
	}
	var p Parser

	f := F{V: 4}
	err := p.Parse([]string{"x"}, &f)
	require.NoError(t, err)
	require.Equal(t, 4, f.V)
}

type noFlagSetArgs struct {
	args []string
}

func (n *noFlagSetArgs) SetArgs(args []string) {
	n.args = args
}

func TestParseNoFlagSetArgs(t *testing.T) {
	var p Parser
	f := noFlagSetArgs{}
	err := p.Parse([]string{"x"}, &f)
	require.NoError(t, err)
	require.Equal(t, []string{"x"}, f.args)
}

func TestParseArgsError(t *testing.T) {
	type F struct {
		X bool `flag:"x"`
	}
	var p Parser
	f := F{}
	err := p.Parse([]string{"-zz"}, &f)
	require.Error(t, err)
	require.Contains(t, err.Error(), "-zz")
}

func TestParseNotStructPointer(t *testing.T) {
	var (
		i int
		p Parser
	)
	require.Panics(t, func() {
		_ = p.Parse([]string{"-h"}, i)
	})
}

func TestParseUnsupportedFlagType(t *testing.T) {
	type F struct {
		C *bool `flag:"c"`
	}
	var (
		f F
		p Parser
	)
	require.Panics(t, func() {
		_ = p.Parse([]string{"-h"}, &f)
	})
}