claudeandClaude Sonnet 5
e65d7d66c1
Collect is the all-errors-at-once counterpart to All. All still stops at the first failure (unchanged); Collect runs every function and returns the failures joined with errors.Join, which errors.Is still matches element by element. Kept as a separate function rather than a flag on All so All's signature and behaviour don't change. Closes #5 Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
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 ExampleCollect() {
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v := Collect(MinLength(4), Chars("0123456789abcdef"))
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fmt.Println(v("xy"))
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// Output:
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// must contain at least 4 characters
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// contains disallowed characters
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}
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func TestCollect(t *testing.T) {
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v := Collect(
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MinLength(4),
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MaxLength(8),
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Chars("0123456789abcdef"),
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)
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t.Run("no failures returns nil", func(t *testing.T) {
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if err := v("abc123"); err != nil {
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t.Fatalf("got %v, want nil", err)
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}
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})
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t.Run("every failure is reported", func(t *testing.T) {
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// too long (>8) and contains disallowed characters; not too short.
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err := v("xyz!!!!!!!!")
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if errors.Is(err, ErrMustBeLonger) {
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t.Error("did not expect ErrMustBeLonger in", err)
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}
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if !errors.Is(err, ErrMustBeShorter) {
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t.Error("want ErrMustBeShorter in", err)
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}
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if !errors.Is(err, ErrDisallowedChars) {
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t.Error("want ErrDisallowedChars in", err)
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}
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})
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t.Run("a single failure still matches with errors.Is", func(t *testing.T) {
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err := v("12") // only too short
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if !errors.Is(err, ErrMustBeLonger) {
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t.Error("want ErrMustBeLonger in", err)
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}
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if errors.Is(err, ErrDisallowedChars) {
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t.Error("did not expect ErrDisallowedChars in", err)
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}
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})
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}
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