sources: Update the tests for HTTP client

Signed-off-by: Stéphane Graber <stgraber@stgraber.org>

sources/apertis-http_test.go

@@ -2,6 +2,7 @@ package sources
 
 import (
 	"fmt"
+	"net/http"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -9,6 +10,7 @@ import (
 
 func TestApertisHTTP_getLatestRelease(t *testing.T) {
 	s := &apertis{}
+	s.client = http.DefaultClient
 
 	tests := []struct {
 		release string

sources/archlinux-http_test.go

@@ -1,6 +1,7 @@
 package sources
 
 import (
+	"net/http"
 	"regexp"
 	"testing"
 
@@ -8,7 +9,8 @@ import (
 )
 
 func TestArchLinuxGetLatestRelease(t *testing.T) {
-	var src archlinux
+	src := &archlinux{}
+	src.client = http.DefaultClient
 
 	release, err := src.getLatestRelease("https://archive.archlinux.org/iso/", "x86_64")
 	require.NoError(t, err)

sources/openeuler-http_test.go

@@ -1,6 +1,7 @@
 package sources
 
 import (
+	"net/http"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -8,6 +9,7 @@ import (
 
 func TestGetLatestRelease(t *testing.T) {
 	s := &openEuler{}
+	s.client = http.DefaultClient
 
 	tests := []struct {
 		url        string

sources/openwrt-http_test.go

@@ -1,6 +1,7 @@
 package sources
 
 import (
+	"net/http"
 	"regexp"
 	"testing"
 
@@ -9,6 +10,7 @@ import (
 
 func TestOpenWrtHTTP_getLatestServiceRelease(t *testing.T) {
 	s := &openwrt{}
+	s.client = http.DefaultClient
 
 	tests := []struct {
 		release string