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481e6f1477
Based on the "lazyregexp" package in golang.org/x/mod; https://cs.opensource.google/go/x/mod/+/refs/tags/v0.19.0:internal/lazyregexp/lazyre.go;l=66-78 This package allows defining regular expressions that should not be compiled until used, but still providing validation to prevent invalid regular expressions from producing a panic at runtime. This is largely a copy of the package from golang.org/x/mod, with FindAllStringSubmatch and ReplaceAllStringFunc added Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
24 lines
389 B
Go
24 lines
389 B
Go
package lazyregexp
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import (
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"testing"
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)
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func TestCompileOnce(t *testing.T) {
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t.Run("invalid regexp", func(t *testing.T) {
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defer func() {
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if r := recover(); r == nil {
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t.Errorf("expected a panic")
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}
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}()
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_ = New("[")
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})
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t.Run("valid regexp", func(t *testing.T) {
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re := New("[a-z]")
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ok := re.MatchString("hello")
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if !ok {
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t.Errorf("expected a match")
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}
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})
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}
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