fix: Use mock server for TestBreakConditions (#9948)

- Follow up of forgejo/forgejo!9274
- The test does not call to Gitea for fetching comments, but when initializing the Gitea client it does check the API version and some settings. Mock these responses so this test can be run without a network connection.
- Resolves forgejo/forgejo#9928

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/9948
Reviewed-by: Mathieu Fenniak <mfenniak@noreply.codeberg.org>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>

services/migrations/gitea_downloader_test.go

@@ -407,9 +407,15 @@ func createForgejoIssueComments(comments []*gitea_sdk.Comment) []*base.Comment {
 }
 
 func TestBreakConditions(t *testing.T) {
+	giteaToken := os.Getenv("GITEA_TOKEN")
+
+	fixturePath := "./testdata/gitea/breaking_conditions"
+	server := unittest.NewMockWebServer(t, "https://gitea.com", fixturePath, giteaToken != "")
+	defer server.Close()
+
 	// Client
 	giteaClient, err := gitea_sdk.NewClient(
-		"https://gitea.com",
+		server.URL,
 		gitea_sdk.SetToken(""),
 		gitea_sdk.SetBasicAuth("", ""),
 		gitea_sdk.SetContext(t.Context()),
@@ -418,7 +424,7 @@ func TestBreakConditions(t *testing.T) {
 	require.NoError(t, err, "Clould not create Client")
 
 	// Downloader
-	downloader, err := NewGiteaDownloader(t.Context(), giteaClient, "https://gitea.com", "gitea/test_repo")
+	downloader, err := NewGiteaDownloader(t.Context(), giteaClient, server.URL, "gitea/test_repo")
 	if downloader == nil {
 		t.Fatal("NewGiteaDownloader is nil")
 	}

services/migrations/testdata/gitea/breaking_conditions/GET_%2Fapi%2Fv1%2Fsettings%2Fapi

@@ -0,0 +1,9 @@
+Alt-Svc: h3=":443"; ma=2592000
+Content-Type: application/json;charset=utf-8
+Vary: Origin
+Content-Length: 155
+Cache-Control: max-age=0, private, must-revalidate, no-transform
+X-Content-Type-Options: nosniff
+X-Frame-Options: SAMEORIGIN
+
+{"max_response_items":50,"default_paging_num":10,"default_git_trees_per_page":1000,"default_max_blob_size":10485760,"default_max_response_size":104857600}

services/migrations/testdata/gitea/breaking_conditions/GET_%2Fapi%2Fv1%2Fversion

@@ -0,0 +1,9 @@
+X-Frame-Options: SAMEORIGIN
+Content-Length: 41
+Cache-Control: max-age=0, private, must-revalidate, no-transform
+Content-Type: application/json;charset=utf-8
+Alt-Svc: h3=":443"; ma=2592000
+Vary: Origin
+X-Content-Type-Options: nosniff
+
+{"version":"1.25.0+dev-376-g223205cc6b"}