Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tools/custom_builder/main_test.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"bufio"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestCases(t *testing.T) {
+	// Silence the output
+	log.SetOutput(io.Discard)
+
+	// Get all directories in testdata
+	folders, err := os.ReadDir("testcases")
+	require.NoError(t, err)
+
+	for _, f := range folders {
+		// Only handle folders
+		if !f.IsDir() {
+			continue
+		}
+		configFilename := filepath.Join("testcases", f.Name(), "telegraf.conf")
+		expecedFilename := filepath.Join("testcases", f.Name(), "expected.tags")
+
+		t.Run(f.Name(), func(t *testing.T) {
+			// Read the expected output
+			file, err := os.Open(expecedFilename)
+			require.NoError(t, err)
+			defer file.Close()
+
+			var expected []string
+			scanner := bufio.NewScanner(file)
+			for scanner.Scan() {
+				expected = append(expected, scanner.Text())
+			}
+			require.NoError(t, scanner.Err())
+
+			// Configure the command
+			cfg := &cmdConfig{
+				dryrun:      true,
+				quiet:       true,
+				configFiles: []string{configFilename},
+				root:        "../..",
+			}
+
+			actual, err := process(cfg)
+			require.NoError(t, err)
+			require.EqualValues(t, expected, actual)
+		})
+	}
+}