pcre/pcre_test.go

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package pcre_test
import (
"strings"
"sync"
"testing"
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"go.elara.ws/pcre"
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)
func TestCompileError(t *testing.T) {
r, err := pcre.Compile("(")
if err == nil {
t.Error("expected error, got nil")
}
defer r.Close()
}
func TestMatch(t *testing.T) {
r := pcre.MustCompile(`\d+ (?=USD)`)
defer r.Close()
matches := r.MatchString("9000 USD")
if !matches {
t.Error("expected 9000 USD to match")
}
matches = r.MatchString("9000 RUB")
if matches {
t.Error("expected 9000 RUB not to match")
}
matches = r.MatchString("800 USD")
if !matches {
t.Error("expected 800 USD to match")
}
matches = r.MatchString("700 CAD")
if matches {
t.Error("expected 700 CAD not to match")
}
matches = r.Match([]byte("8 USD"))
if !matches {
t.Error("expected 8 USD to match")
}
}
func TestMatchUngreedy(t *testing.T) {
r := pcre.MustCompileOpts(`Hello, (.+)\.`, pcre.Ungreedy)
defer r.Close()
submatches := r.FindAllStringSubmatch("Hello, World. Hello, pcre2.", 1)
if submatches[0][1] != "World" {
t.Errorf("expected World, got %s", submatches[0][1])
}
matches := r.MatchString("hello, world.")
if matches {
t.Error("expected lowercase 'hello, world' not to match")
}
}
func TestReplace(t *testing.T) {
r := pcre.MustCompile(`(\d+)\.\d+`)
defer r.Close()
testStr := "123.54321 Test"
newStr := r.ReplaceAllString(testStr, "${1}.12345")
if newStr != "123.12345 Test" {
t.Errorf(`expected "123.12345 Test", got "%s"`, newStr)
}
newStr = r.ReplaceAllString(testStr, "${9}.12345")
if newStr != ".12345 Test" {
t.Errorf(`expected ".12345 Test", got "%s"`, newStr)
}
newStr = r.ReplaceAllString(testStr, "${hi}.12345")
if newStr != ".12345 Test" {
t.Errorf(`expected ".12345 Test", got "%s"`, newStr)
}
newStr = r.ReplaceAllLiteralString(testStr, "${1}.12345")
if newStr != "${1}.12345 Test" {
t.Errorf(`expected "${1}.12345 Test", got "%s"`, newStr)
}
newStr = r.ReplaceAllStringFunc(testStr, func(s string) string {
return strings.Replace(s, ".", ",", -1)
})
if newStr != "123,54321 Test" {
t.Errorf(`expected "123,54321 Test", got "%s"`, newStr)
}
}
func TestSplit(t *testing.T) {
r := pcre.MustCompile("a*")
defer r.Close()
split := r.Split("abaabaccadaaae", 5)
expected := [5]string{"", "b", "b", "c", "cadaaae"}
if *(*[5]string)(split) != expected {
t.Errorf("expected %v, got %v", expected, split)
}
split = r.Split("", 0)
if split != nil {
t.Errorf("expected nil, got %v", split)
}
split = r.Split("", 5)
if split[0] != "" {
t.Errorf(`expected []string{""}, got %v`, split)
}
}
func TestFind(t *testing.T) {
r := pcre.MustCompile(`(\d+)`)
defer r.Close()
testStr := "3 times 4 is 12"
matches := r.FindAllString(testStr, -1)
if len(matches) != 3 {
t.Errorf("expected length 3, got %d", len(matches))
}
matches = r.FindAllString(testStr, 2)
if len(matches) != 2 {
t.Errorf("expected length 2, got %d", len(matches))
}
if matches[0] != "3" || matches[1] != "4" {
t.Errorf("expected [3 4], got %v", matches)
}
index := r.FindStringIndex(testStr)
if index[0] != 0 || index[1] != 1 {
t.Errorf("expected [0 1], got %v", index)
}
submatch := r.FindStringSubmatch(testStr)
if submatch[0] != "3" {
t.Errorf("expected 3, got %s", submatch[0])
}
index = r.FindStringSubmatchIndex(testStr)
if *(*[4]int)(index) != [4]int{0, 1, 0, 1} {
t.Errorf("expected [0 1 0 1], got %v", index)
}
submatches := r.FindAllStringSubmatchIndex(testStr, 2)
if len(submatches) != 2 {
t.Errorf("expected length 2, got %d", len(submatches))
}
expected := [2][4]int{{0, 1, 0, 1}, {8, 9, 8, 9}}
if *(*[4]int)(submatches[0]) != expected[0] {
t.Errorf("expected %v, got %v", expected[0], submatches[0])
}
if *(*[4]int)(submatches[1]) != expected[1] {
t.Errorf("expected %v, got %v", expected[0], submatches[0])
}
}
func TestSubexpIndex(t *testing.T) {
r := pcre.MustCompile(`(?P<number>\d)`)
defer r.Close()
index := r.SubexpIndex("number")
if index != 1 {
t.Errorf("expected 1, got %d", index)
}
index = r.SubexpIndex("string")
if index != -1 {
t.Errorf("expected -1, got %d", index)
}
num := r.NumSubexp()
if num != 1 {
t.Errorf("expected 1, got %d", num)
}
}
func TestConcurrency(t *testing.T) {
r := pcre.MustCompile(`\d*`)
defer r.Close()
wg := &sync.WaitGroup{}
wg.Add(1)
go func() {
defer wg.Done()
found := r.FindString("Test string 12345")
if found != "12345" {
t.Errorf("expected 12345, got %s", found)
}
}()
wg.Add(1)
go func() {
defer wg.Done()
matched := r.MatchString("Hello")
if matched {
t.Errorf("Expected Hello not to match")
}
}()
wg.Add(1)
go func() {
defer wg.Done()
matched := r.MatchString("54321")
if !matched {
t.Errorf("expected 54321 to match")
}
}()
wg.Wait()
}
func TestString(t *testing.T) {
const expr = `()`
r := pcre.MustCompile(expr)
defer r.Close()
if r.String() != expr {
t.Errorf("expected %s, got %s", expr, r.String())
}
}
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func TestCallout(t *testing.T) {
const expr = `(https?)://([.\w\d]+\.[\w\d]{2,4}[\w\d?&=%/.-]*)(?C2)`
subject := "https://www.elara.ws/"
r := pcre.MustCompile(expr)
defer r.Close()
executed := false
r.SetCallout(func(cb *pcre.CalloutBlock) int32 {
executed = true
if cb.CalloutNumber != 2 {
t.Errorf("[CalloutNumber] expected %d, got %d", 2, cb.CalloutNumber)
}
if cb.CaptureTop != 3 {
t.Errorf("[CaptureTop] expected %d, got %d", 3, cb.CaptureTop)
}
if cb.CaptureLast != 2 {
t.Errorf("[CaptureLast] expected %d, got %d", 2, cb.CaptureLast)
}
if cb.Subject != subject {
t.Errorf("[Subject] expected %q, got %q", subject, cb.Subject)
}
if cb.StartMatch != 0 {
t.Errorf("[StartMatch] expected %d, got %d", 0, cb.StartMatch)
}
if cb.CurrentPosition != 21 {
t.Errorf("[CurrentPosition] expected %d, got %d", 0, cb.CurrentPosition)
}
if cb.PatternPosition != 53 {
t.Errorf("[PatternPosition] expected %d, got %d", 53, cb.PatternPosition)
}
if cb.NextItemLength != 0 {
t.Errorf("[NextItemLength] expected %d, got %d", 0, cb.NextItemLength)
}
return 0
})
m := r.MatchString(subject)
if !executed {
t.Error("expected callout to be executed")
} else if !m {
t.Error("expected regular expression to match the string")
}
}