Add cache test for admins

options/locale/locale_en-US.ini

@@ -93,6 +93,7 @@ remove_all = Remove All
 remove_label_str = Remove item "%s"
 edit = Edit
 view = View
+test = Test
 
 enabled = Enabled
 disabled = Disabled
@@ -3224,6 +3225,9 @@ config.cache_adapter = Cache Adapter
 config.cache_interval = Cache Interval
 config.cache_conn = Cache Connection
 config.cache_item_ttl = Cache Item TTL
+config.cache_test = Test Cache
+config.cache_test_failed = Failed to probe the cache: %v.
+config.cache_test_succeeded = Probe cache succeeded, response took %s.
 
 config.session_config = Session Configuration
 config.session_provider = Session Provider

routers/web/admin/config.go

@@ -5,13 +5,16 @@
 package admin
 
 import (
+	"fmt"
 	"net/http"
 	"net/url"
 	"strconv"
 	"strings"
+	"time"
 
 	system_model "code.gitea.io/gitea/models/system"
 	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/cache"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/log"
@@ -42,6 +45,45 @@ func SendTestMail(ctx *context.Context) {
 	ctx.Redirect(setting.AppSubURL + "/admin/config")
 }
 
+const testCacheKey = "Admin.TestCacheKey"
+
+// TestCache test the cache settings
+func TestCache(ctx *context.Context) {
+	// prepare cache
+	c := cache.GetCache()
+	var elapsed string
+
+	err := func() error {
+		start := time.Now()
+
+		if err := c.Delete(testCacheKey); err != nil {
+			return err
+		}
+		if err := c.Put(testCacheKey, testCacheKey, 10); err != nil {
+			return err
+		}
+		testVal, hit := c.Get(testCacheKey)
+		if !hit {
+			return fmt.Errorf("Expect cache hit but got none")
+		}
+		if testVal != testCacheKey {
+			return fmt.Errorf("Expect cache to return same value as stored but got other")
+		}
+
+		// we want the meridian of a single response so we divide with 3
+		elapsed = fmt.Sprint(time.Since(start) / 3)
+		return nil
+	}()
+
+	if err != nil {
+		ctx.Flash.Error(ctx.Tr("admin.config.cache_test_failed", err))
+	} else {
+		ctx.Flash.Info(ctx.Tr("admin.config.cache_test_succeeded", elapsed))
+	}
+
+	ctx.Redirect(setting.AppSubURL + "/admin/config")
+}
+
 func shadowPasswordKV(cfgItem, splitter string) string {
 	fields := strings.Split(cfgItem, splitter)
 	for i := 0; i < len(fields); i++ {

routers/web/web.go

@@ -692,6 +692,7 @@ func registerRoutes(m *web.Route) {
 			m.Get("", admin.Config)
 			m.Post("", admin.ChangeConfig)
 			m.Post("/test_mail", admin.SendTestMail)
+			m.Post("/test_cache", admin.TestCache)
 			m.Get("/settings", admin.ConfigSettings)
 		})
 

templates/admin/config.tmpl

@@ -260,6 +260,14 @@
 					<dt>{{ctx.Locale.Tr "admin.config.cache_item_ttl"}}</dt>
 					<dd><code>{{.CacheItemTTL}}</code></dd>
 				{{end}}
+				<div class="divider"></div>
+				<dt class="tw-py-1">{{ctx.Locale.Tr "admin.config.cache_test"}}</dt>
+				<dd>
+					<form class="ui form ignore-dirty" action="{{AppSubUrl}}/admin/config/test_cache" method="post">
+						{{.CsrfTokenHtml}}
+						<button class="ui tiny primary button">{{ctx.Locale.Tr "test"}}</button>
+					</form>
+				</dd>
 			</dl>
 		</div>