47 lines
992 B
Go
47 lines
992 B
Go
 
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package validate
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import (
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"errors"
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"fmt"
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"testing"
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)
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func ExampleRequired() {
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notBlank := Required[string]()
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fmt.Println(notBlank(""))
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// Output: is required
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}
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func TestRequired(t *testing.T) {
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t.Run("string", func(t *testing.T) {
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v := Required[string]()
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if err := v(""); !errors.Is(err, ErrRequired) {
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t.Error("empty string should be required, got", err)
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}
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if err := v("x"); err != nil {
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t.Error("non-empty string should pass, got", err)
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}
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})
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t.Run("int", func(t *testing.T) {
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v := Required[int]()
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if err := v(0); !errors.Is(err, ErrRequired) {
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t.Error("zero should be required, got", err)
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}
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if err := v(1); err != nil {
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t.Error("non-zero should pass, got", err)
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}
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})
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t.Run("pointer", func(t *testing.T) {
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v := Required[*int]()
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if err := v(nil); !errors.Is(err, ErrRequired) {
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t.Error("nil pointer should be required, got", err)
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}
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n := 0
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if err := v(&n); err != nil {
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t.Error("non-nil pointer should pass, got", err)
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}
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})
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}
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