migrations: add test for importing pull requests in gitea uploader (#18752)

* logs: add the buffer logger to inspect logs during testing

Signed-off-by: Loïc Dachary <loic@dachary.org>

* migrations: add test for importing pull requests in gitea uploader

Signed-off-by: Loïc Dachary <loic@dachary.org>

* for each git.OpenRepositoryCtx, call Close

* Content is expected to return the content of the log

* test for errors before defer

Co-authored-by: Loïc Dachary <loic@dachary.org>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/migrations/testlogger_test.go

@@ -166,6 +166,11 @@ func (log *TestLogger) Init(config string) error {
 	return nil
 }
 
+// Content returns the content accumulated in the content provider
+func (log *TestLogger) Content() (string, error) {
+	return "", fmt.Errorf("not supported")
+}
+
 // Flush when log should be flushed
 func (log *TestLogger) Flush() {
 }