forked from mirror/cobra
Deprecate ExactValidArgs() and test combinations of args validators (#1643)
* deprecate ExactValidArgs in favour of MatchAll(OnlyValidArgs, ...) * test combinations of args validators * adjust docs
This commit is contained in:
Unai Martinez-Corral
GitHub
parent
2e8ba6f308
commit
70e53f62be
24
args.go
24
args.go
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@ -32,7 +32,8 @@ func NoArgs(cmd *Command, args []string) error {
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return nil
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}
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// OnlyValidArgs returns an error if any args are not in the list of ValidArgs.
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// OnlyValidArgs returns an error if there are any positional args that are not in
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// the `ValidArgs` field of `Command`
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func OnlyValidArgs(cmd *Command, args []string) error {
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if len(cmd.ValidArgs) > 0 {
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// Remove any description that may be included in ValidArgs.
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@ -41,7 +42,6 @@ func OnlyValidArgs(cmd *Command, args []string) error {
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for _, v := range cmd.ValidArgs {
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validArgs = append(validArgs, strings.Split(v, "\t")[0])
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}
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for _, v := range args {
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if !stringInSlice(v, validArgs) {
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return fmt.Errorf("invalid argument %q for %q%s", v, cmd.CommandPath(), cmd.findSuggestions(args[0]))
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@ -86,18 +86,6 @@ func ExactArgs(n int) PositionalArgs {
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}
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}
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// ExactValidArgs returns an error if
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// there are not exactly N positional args OR
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// there are any positional args that are not in the `ValidArgs` field of `Command`
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func ExactValidArgs(n int) PositionalArgs {
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return func(cmd *Command, args []string) error {
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if err := ExactArgs(n)(cmd, args); err != nil {
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return err
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}
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return OnlyValidArgs(cmd, args)
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}
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}
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// RangeArgs returns an error if the number of args is not within the expected range.
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func RangeArgs(min int, max int) PositionalArgs {
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return func(cmd *Command, args []string) error {
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@ -119,3 +107,11 @@ func MatchAll(pargs ...PositionalArgs) PositionalArgs {
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return nil
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}
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}
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// ExactValidArgs returns an error if there are not exactly N positional args OR
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// there are any positional args that are not in the `ValidArgs` field of `Command`
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//
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// Deprecated: use MatchAll(ExactArgs(n), OnlyValidArgs) instead
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func ExactValidArgs(n int) PositionalArgs {
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return MatchAll(ExactArgs(n), OnlyValidArgs)
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}
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250
args_test.go
250
args_test.go
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@ -27,7 +27,7 @@ func expectSuccess(output string, err error, t *testing.T) {
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}
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}
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func validWithInvalidArgs(err error, t *testing.T) {
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func validOnlyWithInvalidArgs(err error, t *testing.T) {
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if err == nil {
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t.Fatal("Expected an error")
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}
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@ -38,12 +38,12 @@ func validWithInvalidArgs(err error, t *testing.T) {
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}
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}
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func noArgsWithArgs(err error, t *testing.T) {
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func noArgsWithArgs(err error, t *testing.T, arg string) {
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if err == nil {
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t.Fatal("Expected an error")
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}
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got := err.Error()
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expected := `unknown command "illegal" for "c"`
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expected := `unknown command "` + arg + `" for "c"`
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if got != expected {
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t.Errorf("Expected: %q, got: %q", expected, got)
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}
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@ -93,102 +93,280 @@ func rangeArgsWithInvalidCount(err error, t *testing.T) {
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}
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}
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// NoArgs
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func TestNoArgs(t *testing.T) {
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c := getCommand(NoArgs, false)
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output, err := executeCommand(c)
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expectSuccess(output, err, t)
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}
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func TestNoArgsWithArgs(t *testing.T) {
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func TestNoArgs_WithArgs(t *testing.T) {
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c := getCommand(NoArgs, false)
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_, err := executeCommand(c, "illegal")
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noArgsWithArgs(err, t)
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_, err := executeCommand(c, "one")
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noArgsWithArgs(err, t, "one")
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}
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func TestNoArgs_WithValid_WithArgs(t *testing.T) {
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c := getCommand(NoArgs, true)
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_, err := executeCommand(c, "one")
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noArgsWithArgs(err, t, "one")
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}
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func TestNoArgs_WithValid_WithInvalidArgs(t *testing.T) {
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c := getCommand(NoArgs, true)
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_, err := executeCommand(c, "a")
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noArgsWithArgs(err, t, "a")
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}
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func TestNoArgs_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, NoArgs), true)
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_, err := executeCommand(c, "a")
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validOnlyWithInvalidArgs(err, t)
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}
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// OnlyValidArgs
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func TestOnlyValidArgs(t *testing.T) {
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c := getCommand(OnlyValidArgs, true)
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output, err := executeCommand(c, "one", "two")
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expectSuccess(output, err, t)
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}
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func TestOnlyValidArgsWithInvalidArgs(t *testing.T) {
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func TestOnlyValidArgs_WithInvalidArgs(t *testing.T) {
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c := getCommand(OnlyValidArgs, true)
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_, err := executeCommand(c, "a")
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validWithInvalidArgs(err, t)
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validOnlyWithInvalidArgs(err, t)
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}
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// ArbitraryArgs
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func TestArbitraryArgs(t *testing.T) {
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c := getCommand(ArbitraryArgs, false)
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output, err := executeCommand(c, "a", "b")
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expectSuccess(output, err, t)
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}
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func TestArbitraryArgs_WithValid(t *testing.T) {
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c := getCommand(ArbitraryArgs, true)
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output, err := executeCommand(c, "one", "two")
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expectSuccess(output, err, t)
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}
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func TestArbitraryArgs_WithValid_WithInvalidArgs(t *testing.T) {
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c := getCommand(ArbitraryArgs, true)
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output, err := executeCommand(c, "a")
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expectSuccess(output, err, t)
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}
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func TestArbitraryArgs_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, ArbitraryArgs), true)
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_, err := executeCommand(c, "a")
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validOnlyWithInvalidArgs(err, t)
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}
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// MinimumNArgs
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func TestMinimumNArgs(t *testing.T) {
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c := getCommand(MinimumNArgs(2), false)
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output, err := executeCommand(c, "a", "b", "c")
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expectSuccess(output, err, t)
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}
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func TestMinimumNArgsWithLessArgs(t *testing.T) {
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func TestMinimumNArgs_WithValid(t *testing.T) {
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c := getCommand(MinimumNArgs(2), true)
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output, err := executeCommand(c, "one", "three")
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expectSuccess(output, err, t)
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}
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func TestMinimumNArgs_WithValid__WithInvalidArgs(t *testing.T) {
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c := getCommand(MinimumNArgs(2), true)
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output, err := executeCommand(c, "a", "b")
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expectSuccess(output, err, t)
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}
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func TestMinimumNArgs_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, MinimumNArgs(2)), true)
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_, err := executeCommand(c, "a", "b")
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validOnlyWithInvalidArgs(err, t)
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}
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func TestMinimumNArgs_WithLessArgs(t *testing.T) {
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c := getCommand(MinimumNArgs(2), false)
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_, err := executeCommand(c, "a")
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minimumNArgsWithLessArgs(err, t)
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}
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func TestMinimumNArgs_WithLessArgs_WithValid(t *testing.T) {
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c := getCommand(MinimumNArgs(2), true)
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_, err := executeCommand(c, "one")
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minimumNArgsWithLessArgs(err, t)
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}
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func TestMinimumNArgs_WithLessArgs_WithValid_WithInvalidArgs(t *testing.T) {
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c := getCommand(MinimumNArgs(2), true)
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_, err := executeCommand(c, "a")
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minimumNArgsWithLessArgs(err, t)
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}
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func TestMinimumNArgs_WithLessArgs_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, MinimumNArgs(2)), true)
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_, err := executeCommand(c, "a")
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validOnlyWithInvalidArgs(err, t)
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}
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// MaximumNArgs
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func TestMaximumNArgs(t *testing.T) {
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c := getCommand(MaximumNArgs(3), false)
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output, err := executeCommand(c, "a", "b")
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expectSuccess(output, err, t)
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}
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func TestMaximumNArgsWithMoreArgs(t *testing.T) {
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func TestMaximumNArgs_WithValid(t *testing.T) {
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c := getCommand(MaximumNArgs(2), true)
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output, err := executeCommand(c, "one", "three")
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expectSuccess(output, err, t)
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}
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func TestMaximumNArgs_WithValid_WithInvalidArgs(t *testing.T) {
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c := getCommand(MaximumNArgs(2), true)
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output, err := executeCommand(c, "a", "b")
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expectSuccess(output, err, t)
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}
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func TestMaximumNArgs_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, MaximumNArgs(2)), true)
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_, err := executeCommand(c, "a", "b")
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validOnlyWithInvalidArgs(err, t)
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}
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func TestMaximumNArgs_WithMoreArgs(t *testing.T) {
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c := getCommand(MaximumNArgs(2), false)
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_, err := executeCommand(c, "a", "b", "c")
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maximumNArgsWithMoreArgs(err, t)
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}
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func TestMaximumNArgs_WithMoreArgs_WithValid(t *testing.T) {
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c := getCommand(MaximumNArgs(2), true)
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_, err := executeCommand(c, "one", "three", "two")
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maximumNArgsWithMoreArgs(err, t)
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}
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func TestMaximumNArgs_WithMoreArgs_WithValid_WithInvalidArgs(t *testing.T) {
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c := getCommand(MaximumNArgs(2), true)
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_, err := executeCommand(c, "a", "b", "c")
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maximumNArgsWithMoreArgs(err, t)
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}
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func TestMaximumNArgs_WithMoreArgs_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, MaximumNArgs(2)), true)
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_, err := executeCommand(c, "a", "b", "c")
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validOnlyWithInvalidArgs(err, t)
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}
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// ExactArgs
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func TestExactArgs(t *testing.T) {
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c := getCommand(ExactArgs(3), false)
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output, err := executeCommand(c, "a", "b", "c")
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expectSuccess(output, err, t)
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}
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func TestExactArgsWithInvalidCount(t *testing.T) {
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func TestExactArgs_WithValid(t *testing.T) {
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c := getCommand(ExactArgs(3), true)
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output, err := executeCommand(c, "three", "one", "two")
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expectSuccess(output, err, t)
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}
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func TestExactArgs_WithValid_WithInvalidArgs(t *testing.T) {
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c := getCommand(ExactArgs(3), true)
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output, err := executeCommand(c, "three", "a", "two")
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expectSuccess(output, err, t)
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}
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func TestExactArgs_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, ExactArgs(3)), true)
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_, err := executeCommand(c, "three", "a", "two")
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validOnlyWithInvalidArgs(err, t)
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}
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func TestExactArgs_WithInvalidCount(t *testing.T) {
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c := getCommand(ExactArgs(2), false)
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_, err := executeCommand(c, "a", "b", "c")
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exactArgsWithInvalidCount(err, t)
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}
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func TestExactValidArgs(t *testing.T) {
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c := getCommand(ExactValidArgs(3), true)
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output, err := executeCommand(c, "three", "one", "two")
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expectSuccess(output, err, t)
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}
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func TestExactValidArgsWithInvalidCount(t *testing.T) {
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c := getCommand(ExactValidArgs(2), false)
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func TestExactArgs_WithInvalidCount_WithValid(t *testing.T) {
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c := getCommand(ExactArgs(2), true)
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_, err := executeCommand(c, "three", "one", "two")
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exactArgsWithInvalidCount(err, t)
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}
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func TestExactValidArgsWithInvalidArgs(t *testing.T) {
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c := getCommand(ExactValidArgs(3), true)
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func TestExactArgs_WithInvalidCount_WithValid_WithInvalidArgs(t *testing.T) {
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c := getCommand(ExactArgs(2), true)
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_, err := executeCommand(c, "three", "a", "two")
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validWithInvalidArgs(err, t)
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exactArgsWithInvalidCount(err, t)
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}
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func TestExactArgs_WithInvalidCount_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, ExactArgs(2)), true)
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_, err := executeCommand(c, "three", "a", "two")
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validOnlyWithInvalidArgs(err, t)
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}
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// RangeArgs
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func TestRangeArgs(t *testing.T) {
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c := getCommand(RangeArgs(2, 4), false)
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output, err := executeCommand(c, "a", "b", "c")
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expectSuccess(output, err, t)
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}
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func TestRangeArgsWithInvalidCount(t *testing.T) {
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func TestRangeArgs_WithValid(t *testing.T) {
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c := getCommand(RangeArgs(2, 4), true)
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output, err := executeCommand(c, "three", "one", "two")
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expectSuccess(output, err, t)
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}
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func TestRangeArgs_WithValid_WithInvalidArgs(t *testing.T) {
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c := getCommand(RangeArgs(2, 4), true)
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output, err := executeCommand(c, "three", "a", "two")
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expectSuccess(output, err, t)
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}
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func TestRangeArgs_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, RangeArgs(2, 4)), true)
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_, err := executeCommand(c, "three", "a", "two")
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validOnlyWithInvalidArgs(err, t)
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}
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func TestRangeArgs_WithInvalidCount(t *testing.T) {
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c := getCommand(RangeArgs(2, 4), false)
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_, err := executeCommand(c, "a")
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rangeArgsWithInvalidCount(err, t)
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}
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func TestRangeArgs_WithInvalidCount_WithValid(t *testing.T) {
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c := getCommand(RangeArgs(2, 4), true)
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_, err := executeCommand(c, "two")
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rangeArgsWithInvalidCount(err, t)
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}
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func TestRangeArgs_WithInvalidCount_WithValid_WithInvalidArgs(t *testing.T) {
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c := getCommand(RangeArgs(2, 4), true)
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_, err := executeCommand(c, "a")
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rangeArgsWithInvalidCount(err, t)
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}
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func TestRangeArgs_WithInvalidCount_WithValidOnly_WithInvalidArgs(t *testing.T) {
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c := getCommand(MatchAll(OnlyValidArgs, RangeArgs(2, 4)), true)
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_, err := executeCommand(c, "a")
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validOnlyWithInvalidArgs(err, t)
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}
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// Takes(No)Args
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func TestRootTakesNoArgs(t *testing.T) {
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rootCmd := &Command{Use: "root", Run: emptyRun}
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childCmd := &Command{Use: "child", Run: emptyRun}
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@ -293,6 +471,32 @@ func TestMatchAll(t *testing.T) {
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}
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}
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// DEPRECATED
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func TestExactValidArgs(t *testing.T) {
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c := getCommand(ExactValidArgs(3), true)
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output, err := executeCommand(c, "three", "one", "two")
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expectSuccess(output, err, t)
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}
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func TestExactValidArgs_WithInvalidCount(t *testing.T) {
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c := getCommand(ExactValidArgs(2), false)
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_, err := executeCommand(c, "three", "one", "two")
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exactArgsWithInvalidCount(err, t)
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}
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func TestExactValidArgs_WithInvalidCount_WithInvalidArgs(t *testing.T) {
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c := getCommand(ExactValidArgs(2), true)
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_, err := executeCommand(c, "three", "a", "two")
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exactArgsWithInvalidCount(err, t)
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}
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func TestExactValidArgs_WithInvalidArgs(t *testing.T) {
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c := getCommand(ExactValidArgs(2), true)
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_, err := executeCommand(c, "three", "a")
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validOnlyWithInvalidArgs(err, t)
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}
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// This test make sure we keep backwards-compatibility with respect
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// to the legacyArgs() function.
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// It makes sure the root command accepts arguments if it does not have
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@ -302,15 +302,15 @@ rootCmd.MarkPersistentFlagRequired("region")
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### Flag Groups
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If you have different flags that must be provided together (e.g. if they provide the `--username` flag they MUST provide the `--password` flag as well) then
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If you have different flags that must be provided together (e.g. if they provide the `--username` flag they MUST provide the `--password` flag as well) then
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Cobra can enforce that requirement:
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```go
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rootCmd.Flags().StringVarP(&u, "username", "u", "", "Username (required if password is set)")
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rootCmd.Flags().StringVarP(&pw, "password", "p", "", "Password (required if username is set)")
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rootCmd.MarkFlagsRequiredTogether("username", "password")
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```
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```
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You can also prevent different flags from being provided together if they represent mutually
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You can also prevent different flags from being provided together if they represent mutually
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exclusive options such as specifying an output format as either `--json` or `--yaml` but never both:
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```go
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rootCmd.Flags().BoolVar(&u, "json", false, "Output in JSON")
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@ -327,29 +327,47 @@ In both of these cases:
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## Positional and Custom Arguments
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Validation of positional arguments can be specified using the `Args` field of `Command`.
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If `Args` is undefined or `nil`, it defaults to `ArbitraryArgs`.
|
||||
|
||||
The following validators are built in:
|
||||
|
||||
- `NoArgs` - the command will report an error if there are any positional args.
|
||||
- `ArbitraryArgs` - the command will accept any args.
|
||||
- `OnlyValidArgs` - the command will report an error if there are any positional args that are not in the `ValidArgs` field of `Command`.
|
||||
- `MinimumNArgs(int)` - the command will report an error if there are not at least N positional args.
|
||||
- `MaximumNArgs(int)` - the command will report an error if there are more than N positional args.
|
||||
- `ExactArgs(int)` - the command will report an error if there are not exactly N positional args.
|
||||
- `ExactValidArgs(int)` - the command will report an error if there are not exactly N positional args OR if there are any positional args that are not in the `ValidArgs` field of `Command`
|
||||
- `RangeArgs(min, max)` - the command will report an error if the number of args is not between the minimum and maximum number of expected args.
|
||||
- `MatchAll(pargs ...PositionalArgs)` - enables combining existing checks with arbitrary other checks (e.g. you want to check the ExactArgs length along with other qualities).
|
||||
- Number of arguments:
|
||||
- `NoArgs` - report an error if there are any positional args.
|
||||
- `ArbitraryArgs` - accept any number of args.
|
||||
- `MinimumNArgs(int)` - report an error if less than N positional args are provided.
|
||||
- `MaximumNArgs(int)` - report an error if more than N positional args are provided.
|
||||
- `ExactArgs(int)` - report an error if there are not exactly N positional args.
|
||||
- `RangeArgs(min, max)` - report an error if the number of args is not between `min` and `max`.
|
||||
- Content of the arguments:
|
||||
- `OnlyValidArgs` - report an error if there are any positional args not specified in the `ValidArgs` field of `Command`, which can optionally be set to a list of valid values for positional args.
|
||||
|
||||
An example of setting the custom validator:
|
||||
If `Args` is undefined or `nil`, it defaults to `ArbitraryArgs`.
|
||||
|
||||
Moreover, `MatchAll(pargs ...PositionalArgs)` enables combining existing checks with arbitrary other checks.
|
||||
For instance, if you want to report an error if there are not exactly N positional args OR if there are any positional
|
||||
args that are not in the `ValidArgs` field of `Command`, you can call `MatchAll` on `ExactArgs` and `OnlyValidArgs`, as
|
||||
shown below:
|
||||
|
||||
```go
|
||||
var cmd = &cobra.Command{
|
||||
Short: "hello",
|
||||
Args: MatchAll(ExactArgs(2), OnlyValidArgs),
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Hello, World!")
|
||||
},
|
||||
}
|
||||
```
|
||||
|
||||
It is possible to set any custom validator that satisfies `func(cmd *cobra.Command, args []string) error`.
|
||||
For example:
|
||||
|
||||
```go
|
||||
var cmd = &cobra.Command{
|
||||
Short: "hello",
|
||||
Args: func(cmd *cobra.Command, args []string) error {
|
||||
if len(args) < 1 {
|
||||
return errors.New("requires a color argument")
|
||||
// Optionally run one of the validators provided by cobra
|
||||
if err := cobra.MinimumNArgs(1)(cmd, args); err != nil {
|
||||
return err
|
||||
}
|
||||
// Run the custom validation logic
|
||||
if myapp.IsValidColor(args[0]) {
|
||||
return nil
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue