Alec Thomas
103 lines
2.3 KiB
Go
103 lines
2.3 KiB
Go
package kong
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import (
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"bytes"
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestHelp(t *testing.T) {
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// nolint: govet
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var cli struct {
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String string `help:"A string flag."`
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Bool bool `help:"A bool flag with very long help that wraps a lot and is verbose and is really verbose."`
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Required bool `required help:"A required flag."`
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One struct {
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Flag string `help:"Nested flag."`
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} `cmd help:"A subcommand."`
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Two struct {
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Flag string `help:"Nested flag under two."`
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RequiredTwo bool `required`
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Three struct {
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RequiredThree bool `required`
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Three string `arg`
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} `arg help:"Sub-sub-arg."`
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Four struct {
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} `cmd help:"Sub-sub-command."`
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} `cmd help:"Another subcommand."`
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}
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w := bytes.NewBuffer(nil)
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exited := false
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app := mustNew(t, &cli,
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Name("test-app"),
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Description("A test app."),
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Writers(w, w),
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Exit(func(int) {
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exited = true
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panic(true) // Panic to fake "exit".
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}),
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)
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t.Run("Full", func(t *testing.T) {
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require.Panics(t, func() {
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_, err := app.Parse([]string{"--help"})
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require.NoError(t, err)
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})
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require.True(t, exited)
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t.Log(w.String())
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require.Equal(t, `usage: test-app --required <command>
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A test app.
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Flags:
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--help Show context-sensitive help.
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--string=STRING A string flag.
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--bool A bool flag with very long help that wraps a lot and is
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verbose and is really verbose.
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--required A required flag.
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Commands:
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one --required
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A subcommand.
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two <three> --required --required-two --required-three
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Sub-sub-arg.
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two four --required --required-two
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Sub-sub-command.
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`, w.String())
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})
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t.Run("Selected", func(t *testing.T) {
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exited = false
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w.Truncate(0)
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require.Panics(t, func() {
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_, err := app.Parse([]string{"two", "hello", "--help"})
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require.NoError(t, err)
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})
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require.True(t, exited)
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t.Log(w.String())
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require.Equal(t, `usage: test-app two <three> --required --required-two --required-three
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Sub-sub-arg.
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Flags:
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--string=STRING A string flag.
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--bool A bool flag with very long help that wraps a lot and is
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verbose and is really verbose.
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--required A required flag.
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--flag=STRING Nested flag under two.
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--required-two
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--required-three
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`, w.String())
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})
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}
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