ut: compare dns options without order

pkg/kubelet/network/dns/dns.go

@@ -280,26 +280,6 @@ func parseResolvConf(reader io.Reader) (nameservers []string, searches []string,
 	return nameservers, searches, options, utilerrors.NewAggregate(allErrors)
 }
 
-// appendOptions appends options to the given list, but does not add duplicates.
-// append option will overwrite the previous one either in new line or in the same line.
-func appendOptions(options []string, newOption ...string) []string {
-	var optionMap = make(map[string]string)
-	for _, option := range options {
-		optName := strings.Split(option, ":")[0]
-		optionMap[optName] = option
-	}
-	for _, option := range newOption {
-		optName := strings.Split(option, ":")[0]
-		optionMap[optName] = option
-	}
-
-	options = []string{}
-	for _, v := range optionMap {
-		options = append(options, v)
-	}
-	return options
-}
-
 func (c *Configurer) getHostDNSConfig() (*runtimeapi.DNSConfig, error) {
 	var hostDNS, hostSearch, hostOptions []string
 	// Get host DNS settings
@@ -373,6 +353,26 @@ func mergeDNSOptions(existingDNSConfigOptions []string, dnsConfigOptions []v1.Po
 	return options
 }
 
+// appendOptions appends options to the given list, but does not add duplicates.
+// append option will overwrite the previous one either in new line or in the same line.
+func appendOptions(options []string, newOption ...string) []string {
+	var optionMap = make(map[string]string)
+	for _, option := range options {
+		optName := strings.Split(option, ":")[0]
+		optionMap[optName] = option
+	}
+	for _, option := range newOption {
+		optName := strings.Split(option, ":")[0]
+		optionMap[optName] = option
+	}
+
+	options = []string{}
+	for _, v := range optionMap {
+		options = append(options, v)
+	}
+	return options
+}
+
 // appendDNSConfig appends DNS servers, search paths and options given by
 // PodDNSConfig to the existing DNS config. Duplicated entries will be merged.
 // This assumes existingDNSConfig and dnsConfig are not nil.

pkg/kubelet/network/dns/dns_test.go

@@ -105,7 +105,7 @@ func TestParseResolvConf(t *testing.T) {
 			require.NoError(t, err)
 			assert.EqualValues(t, tc.nameservers, ns, "test case [%d]: name servers", i)
 			assert.EqualValues(t, tc.searches, srch, "test case [%d] searches", i)
-			assert.EqualValues(t, tc.options, opts, "test case [%d] options", i)
+			assert.EqualValues(t, sets.NewString(tc.options...), sets.NewString(opts...), "test case [%d] options", i)
 		} else {
 			require.Error(t, err, "tc.searches %v", tc.searches)
 		}