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>

modules/log/buffer_test.go

@@ -0,0 +1,64 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package log
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBufferLogger(t *testing.T) {
+	logger := NewBufferLogger()
+	bufferLogger := logger.(*BufferLogger)
+	assert.NotNil(t, bufferLogger)
+
+	err := logger.Init("")
+	assert.NoError(t, err)
+
+	location, _ := time.LoadLocation("EST")
+	date := time.Date(2019, time.January, 13, 22, 3, 30, 15, location)
+
+	msg := "TEST MSG"
+	event := Event{
+		level:    INFO,
+		msg:      msg,
+		caller:   "CALLER",
+		filename: "FULL/FILENAME",
+		line:     1,
+		time:     date,
+	}
+	logger.LogEvent(&event)
+	content, err := bufferLogger.Content()
+	assert.NoError(t, err)
+	assert.Contains(t, content, msg)
+	logger.Close()
+}
+
+func TestBufferLoggerContent(t *testing.T) {
+	level := INFO
+	logger := NewLogger(0, "console", "console", fmt.Sprintf(`{"level":"%s"}`, level.String()))
+
+	logger.SetLogger("buffer", "buffer", "{}")
+	defer logger.DelLogger("buffer")
+
+	msg := "A UNIQUE MESSAGE"
+	Error(msg)
+
+	found := false
+	for i := 0; i < 30000; i++ {
+		content, err := logger.GetLoggerProviderContent("buffer")
+		assert.NoError(t, err)
+		if strings.Contains(content, msg) {
+			found = true
+			break
+		}
+		time.Sleep(1 * time.Millisecond)
+	}
+	assert.True(t, found)
+}