67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
 
|
package validate_test
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
"fmt"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"code.aneur.in/go/validate"
|
||
|
|
)
|
||
|
|
|
||
|
|
// A validator is any func(T) error. Compose the built-ins with your own
|
||
|
|
// closures using All (stop at the first failure) or Collect (report all).
|
||
|
|
func Example() {
|
||
|
|
username := validate.All(
|
||
|
|
validate.MinLength(3),
|
||
|
|
validate.MaxLength(16),
|
||
|
|
validate.Chars("abcdefghijklmnopqrstuvwxyz0123456789_"),
|
||
|
|
func(s string) error {
|
||
|
|
if strings.HasPrefix(s, "_") {
|
||
|
|
return errors.New("must not start with an underscore")
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
},
|
||
|
|
)
|
||
|
|
|
||
|
|
fmt.Println(username("ok_name"))
|
||
|
|
fmt.Println(username("_nope"))
|
||
|
|
fmt.Println(username("Nope"))
|
||
|
|
// Output:
|
||
|
|
// <nil>
|
||
|
|
// must not start with an underscore
|
||
|
|
// contains disallowed characters
|
||
|
|
}
|
||
|
|
|
||
|
|
// Collect runs every validator and joins the failures; errors.Is still
|
||
|
|
// matches each one.
|
||
|
|
func Example_collectAll() {
|
||
|
|
password := validate.Collect(
|
||
|
|
validate.MinLength(8),
|
||
|
|
validate.Chars("abcdefghijklmnopqrstuvwxyz"),
|
||
|
|
)
|
||
|
|
|
||
|
|
err := password("Ab1")
|
||
|
|
fmt.Println(err)
|
||
|
|
fmt.Println(errors.Is(err, validate.ErrMustBeLonger))
|
||
|
|
fmt.Println(errors.Is(err, validate.ErrDisallowedChars))
|
||
|
|
// Output:
|
||
|
|
// must contain at least 8 characters
|
||
|
|
// contains disallowed characters
|
||
|
|
// true
|
||
|
|
// true
|
||
|
|
}
|
||
|
|
|
||
|
|
// Errors are plain sentinels, so errors.Is works with no library-specific
|
||
|
|
// machinery. Err matches any error from this package.
|
||
|
|
func Example_errorsIs() {
|
||
|
|
err := validate.Email("not-an-email")
|
||
|
|
|
||
|
|
fmt.Println(err)
|
||
|
|
fmt.Println(errors.Is(err, validate.ErrInvalidEmail))
|
||
|
|
fmt.Println(errors.Is(err, validate.Err))
|
||
|
|
// Output:
|
||
|
|
// invalid email address
|
||
|
|
// true
|
||
|
|
// true
|
||
|
|
}
|