test(linters): Enable sloppyLen (#15512)

.golangci.yml

@@ -109,6 +109,7 @@ linters-settings:
       - nilValReturn
       - offBy1
       - regexpPattern
+      - sloppyLen
       - sloppyReassign
       - sloppyTypeAssert
       - sortSlice

plugins/inputs/aerospike/aerospike.go

@@ -218,7 +218,7 @@ func (a *Aerospike) parseNodeInfo(acc telegraf.Accumulator, stats map[string]str
 
 func (a *Aerospike) getNamespaces(n *as.Node, infoPolicy *as.InfoPolicy) ([]string, error) {
 	var namespaces []string
-	if len(a.Namespaces) <= 0 {
+	if len(a.Namespaces) == 0 {
 		info, err := n.RequestInfo(infoPolicy, "namespaces")
 		if err != nil {
 			return namespaces, err
@@ -262,7 +262,7 @@ func (a *Aerospike) parseNamespaceInfo(acc telegraf.Accumulator, stats map[strin
 func (a *Aerospike) getSets(n *as.Node, infoPolicy *as.InfoPolicy) ([]string, error) {
 	var namespaceSets []string
 	// Gather all sets
-	if len(a.Sets) <= 0 {
+	if len(a.Sets) == 0 {
 		stats, err := n.RequestInfo(infoPolicy, "sets")
 		if err != nil {
 			return namespaceSets, err

plugins/inputs/dovecot/dovecot.go

@@ -46,7 +46,7 @@ func (d *Dovecot) Gather(acc telegraf.Accumulator) error {
 		d.Servers = append(d.Servers, "127.0.0.1:24242")
 	}
 
-	if len(d.Filters) <= 0 {
+	if len(d.Filters) == 0 {
 		d.Filters = append(d.Filters, "")
 	}
 

plugins/inputs/file/file.go

@@ -83,7 +83,7 @@ func (f *File) refreshFilePaths() error {
 			return fmt.Errorf("could not compile glob %q: %w", file, err)
 		}
 		files := g.Match()
-		if len(files) <= 0 {
+		if len(files) == 0 {
 			return fmt.Errorf("could not find file(s): %v", file)
 		}
 		allFiles = append(allFiles, files...)

plugins/inputs/opcua_listener/opcua_listener_test.go

@@ -221,7 +221,7 @@ func TestSubscribeClientIntegration(t *testing.T) {
 						}
 					}
 
-					if len(newRemaining) <= 0 {
+					if len(newRemaining) == 0 {
 						return
 					}
 
@@ -361,7 +361,7 @@ func TestSubscribeClientIntegrationAdditionalFields(t *testing.T) {
 						}
 					}
 
-					if len(newRemaining) <= 0 {
+					if len(newRemaining) == 0 {
 						return
 					}
 					// Test if the received metric matches one of the expected

plugins/inputs/x509_cert/x509_cert.go

@@ -511,7 +511,7 @@ func (c *X509Cert) collectCertURLs() []*url.URL {
 
 	for _, path := range c.globpaths {
 		files := path.Match()
-		if len(files) <= 0 {
+		if len(files) == 0 {
 			c.Log.Errorf("could not find file: %v", path.GetRoots())
 			continue
 		}