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102 lines
2.7 KiB
102 lines
2.7 KiB
package cli
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import (
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"errors"
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"flag"
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"fmt"
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"io/ioutil"
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"strings"
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"testing"
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)
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func TestCommandFlagParsing(t *testing.T) {
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cases := []struct {
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testArgs []string
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skipFlagParsing bool
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expectedErr error
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}{
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{[]string{"blah", "blah", "-break"}, false, errors.New("flag provided but not defined: -break")}, // Test normal "not ignoring flags" flow
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{[]string{"blah", "blah"}, true, nil}, // Test SkipFlagParsing without any args that look like flags
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{[]string{"blah", "-break"}, true, nil}, // Test SkipFlagParsing with random flag arg
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{[]string{"blah", "-help"}, true, nil}, // Test SkipFlagParsing with "special" help flag arg
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}
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for _, c := range cases {
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app := NewApp()
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app.Writer = ioutil.Discard
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set := flag.NewFlagSet("test", 0)
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set.Parse(c.testArgs)
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context := NewContext(app, set, nil)
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command := Command{
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Name: "test-cmd",
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Aliases: []string{"tc"},
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Usage: "this is for testing",
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Description: "testing",
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Action: func(_ *Context) error { return nil },
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}
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command.SkipFlagParsing = c.skipFlagParsing
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err := command.Run(context)
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expect(t, err, c.expectedErr)
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expect(t, []string(context.Args()), c.testArgs)
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}
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}
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func TestCommand_Run_DoesNotOverwriteErrorFromBefore(t *testing.T) {
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app := NewApp()
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app.Commands = []Command{
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{
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Name: "bar",
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Before: func(c *Context) error {
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return fmt.Errorf("before error")
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},
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After: func(c *Context) error {
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return fmt.Errorf("after error")
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},
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},
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}
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err := app.Run([]string{"foo", "bar"})
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if err == nil {
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t.Fatalf("expected to receive error from Run, got none")
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}
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if !strings.Contains(err.Error(), "before error") {
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t.Errorf("expected text of error from Before method, but got none in \"%v\"", err)
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}
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if !strings.Contains(err.Error(), "after error") {
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t.Errorf("expected text of error from After method, but got none in \"%v\"", err)
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}
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}
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func TestCommand_OnUsageError_WithWrongFlagValue(t *testing.T) {
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app := NewApp()
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app.Commands = []Command{
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{
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Name: "bar",
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Flags: []Flag{
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IntFlag{Name: "flag"},
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},
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OnUsageError: func(c *Context, err error, _ bool) error {
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if !strings.HasPrefix(err.Error(), "invalid value \"wrong\"") {
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t.Errorf("Expect an invalid value error, but got \"%v\"", err)
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}
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return errors.New("intercepted: " + err.Error())
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},
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},
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}
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err := app.Run([]string{"foo", "bar", "--flag=wrong"})
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if err == nil {
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t.Fatalf("expected to receive error from Run, got none")
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}
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if !strings.HasPrefix(err.Error(), "intercepted: invalid value") {
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t.Errorf("Expect an intercepted error, but got \"%v\"", err)
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}
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}
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