Improve performance of globpath with some patterns (#4836)

internal/globpath/globpath_test.go

@@ -6,7 +6,6 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
@@ -29,31 +28,32 @@ func TestCompileAndMatch(t *testing.T) {
 	require.NoError(t, err)
 
 	matches := g1.Match()
-	assert.Len(t, matches, 6)
+	require.Len(t, matches, 6)
 	matches = g2.Match()
-	assert.Len(t, matches, 2)
+	require.Len(t, matches, 2)
 	matches = g3.Match()
-	assert.Len(t, matches, 1)
+	require.Len(t, matches, 1)
 	matches = g4.Match()
-	assert.Len(t, matches, 0)
+	require.Len(t, matches, 0)
 	matches = g5.Match()
-	assert.Len(t, matches, 0)
+	require.Len(t, matches, 0)
 }
 
-func TestFindRootDir(t *testing.T) {
+func TestRootGlob(t *testing.T) {
+	dir := getTestdataDir()
 	tests := []struct {
 		input  string
 		output string
 	}{
-		{"/var/log/telegraf.conf", "/var/log"},
-		{"/home/**", "/home"},
-		{"/home/*/**", "/home"},
-		{"/lib/share/*/*/**.txt", "/lib/share"},
+		{dir + "/**", dir + "/*"},
+		{dir + "/nested?/**", dir + "/nested?/*"},
+		{dir + "/ne**/nest*", dir + "/ne*"},
+		{dir + "/nested?/*", ""},
 	}
 
 	for _, test := range tests {
-		actual := findRootDir(test.input)
-		assert.Equal(t, test.output, actual)
+		actual, _ := Compile(test.input)
+		require.Equal(t, actual.rootGlob, test.output)
 	}
 }
 
@@ -64,7 +64,7 @@ func TestFindNestedTextFile(t *testing.T) {
 	require.NoError(t, err)
 
 	matches := g1.Match()
-	assert.Len(t, matches, 1)
+	require.Len(t, matches, 1)
 }
 
 func getTestdataDir() string {