test: characterize Fiber behavior

controllers/threads_controller_test.go

@@ -1,11 +1,16 @@
 package controllers
 
 import (
+	"bytes"
 	"io"
+	"mime/multipart"
+	"net/http"
 	"net/http/httptest"
 	"testing"
 
 	"github.com/gofiber/fiber/v2"
+
+	"micrach/config"
 )
 
 type testViews struct{}
@@ -44,3 +49,37 @@ func TestGetThreadRejectsInvalidID(t *testing.T) {
 		t.Fatalf("status = %d, want %d", resp.StatusCode, fiber.StatusNotFound)
 	}
 }
+
+func TestCreateThreadRejectsInvalidMultipartBeforeDatabase(t *testing.T) {
+	previousConfig := config.App
+	t.Cleanup(func() {
+		config.App = previousConfig
+	})
+	config.App.IsCaptchaActive = false
+
+	var body bytes.Buffer
+	writer := multipart.NewWriter(&body)
+	if err := writer.WriteField("title", ""); err != nil {
+		t.Fatal(err)
+	}
+	if err := writer.WriteField("text", ""); err != nil {
+		t.Fatal(err)
+	}
+	if err := writer.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	app := fiber.New(fiber.Config{Views: testViews{}})
+	app.Post("/", CreateThread)
+
+	req := httptest.NewRequest(http.MethodPost, "/", &body)
+	req.Header.Set(fiber.HeaderContentType, writer.FormDataContentType())
+	resp, err := app.Test(req)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != fiber.StatusBadRequest {
+		t.Fatalf("status = %d, want %d", resp.StatusCode, fiber.StatusBadRequest)
+	}
+}

main.go

@@ -24,6 +24,18 @@ import (
 	"micrach/utils"
 )
 
+func skipRateLimit(isLocal bool, path string) bool {
+	isRequestForStatic := strings.Contains(path, "/static") ||
+		strings.Contains(path, "/uploads") ||
+		strings.Contains(path, "/captcha")
+	return isRequestForStatic || isLocal
+}
+
+func registerStaticRoutes(app *fiber.App) {
+	app.Static("/uploads", "./uploads")
+	app.Static("/static", "./static")
+}
+
 func main() {
 	ctx := context.Background()
 	config.Init()
@@ -54,18 +66,14 @@ func main() {
 	if config.App.IsRateLimiterEnabled {
 		app.Use(limiter.New(limiter.Config{
 			Next: func(c *fiber.Ctx) bool {
-				isDev := c.IsFromLocal()
-				path := c.Path()
-				isRequestForStatic := strings.Contains(path, "/static") || strings.Contains(path, "/uploads") || strings.Contains(path, "/captcha")
-				return isRequestForStatic || isDev
+				return skipRateLimit(c.IsFromLocal(), c.Path())
 			},
 			Max: 50,
 		}))
 	}
 	app.Use(compress.New())
 
-	app.Static("/uploads", "./uploads")
-	app.Static("/static", "./static")
+	registerStaticRoutes(app)
 
 	app.Get("/", controllers.GetThreads)
 	app.Post("/", controllers.CreateThread)

main_test.go

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/limiter"
+)
+
+func TestRegisterStaticRoutes(t *testing.T) {
+	t.Chdir(t.TempDir())
+
+	files := map[string]string{
+		"static/styles/app.css": "body { color: black; }",
+		"uploads/42/o/7.png":    "png-body",
+	}
+	for name, content := range files {
+		if err := os.MkdirAll(filepath.Dir(name), 0o755); err != nil {
+			t.Fatalf("create fixture directory: %v", err)
+		}
+		if err := os.WriteFile(name, []byte(content), 0o644); err != nil {
+			t.Fatalf("write fixture: %v", err)
+		}
+	}
+
+	app := fiber.New()
+	registerStaticRoutes(app)
+	app.Get("/static/fallback", func(c *fiber.Ctx) error {
+		return c.SendString("fallback")
+	})
+
+	tests := []struct {
+		name     string
+		path     string
+		wantCode int
+		wantBody string
+	}{
+		{name: "checked-in static file", path: "/static/styles/app.css", wantCode: fiber.StatusOK, wantBody: files["static/styles/app.css"]},
+		{name: "generated upload", path: "/uploads/42/o/7.png", wantCode: fiber.StatusOK, wantBody: files["uploads/42/o/7.png"]},
+		{name: "missing file continues routing", path: "/static/fallback", wantCode: fiber.StatusOK, wantBody: "fallback"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			resp, err := app.Test(httptest.NewRequest(http.MethodGet, tt.path, nil))
+			if err != nil {
+				t.Fatalf("request %s: %v", tt.path, err)
+			}
+			defer resp.Body.Close()
+			body, err := io.ReadAll(resp.Body)
+			if err != nil {
+				t.Fatalf("read response: %v", err)
+			}
+			if resp.StatusCode != tt.wantCode || string(body) != tt.wantBody {
+				t.Fatalf("response = (%d, %q), want (%d, %q)", resp.StatusCode, body, tt.wantCode, tt.wantBody)
+			}
+		})
+	}
+}
+
+func TestSkipRateLimit(t *testing.T) {
+	tests := []struct {
+		name    string
+		isLocal bool
+		path    string
+		want    bool
+	}{
+		{name: "ordinary remote request", path: "/", want: false},
+		{name: "local request", isLocal: true, path: "/", want: true},
+		{name: "static", path: "/static/styles/index.css", want: true},
+		{name: "upload", path: "/uploads/1/o/1.png", want: true},
+		{name: "captcha", path: "/captcha/id", want: true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := skipRateLimit(tt.isLocal, tt.path); got != tt.want {
+				t.Fatalf("skipRateLimit(%v, %q) = %v, want %v", tt.isLocal, tt.path, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestLimiterRejectsOrdinaryRemoteRequests(t *testing.T) {
+	app := fiber.New()
+	app.Use(limiter.New(limiter.Config{
+		Next: func(c *fiber.Ctx) bool {
+			return skipRateLimit(c.IsFromLocal(), c.Path())
+		},
+		Max: 2,
+	}))
+	app.Get("/", func(c *fiber.Ctx) error {
+		return c.SendStatus(fiber.StatusOK)
+	})
+
+	for requestNumber, want := range []int{fiber.StatusOK, fiber.StatusOK, fiber.StatusTooManyRequests} {
+		resp, err := app.Test(httptest.NewRequest(http.MethodGet, "/", nil))
+		if err != nil {
+			t.Fatalf("request %d: %v", requestNumber+1, err)
+		}
+		resp.Body.Close()
+		if resp.StatusCode != want {
+			t.Fatalf("request %d status = %d, want %d", requestNumber+1, resp.StatusCode, want)
+		}
+	}
+}

templates/templates_test.go

@@ -0,0 +1,30 @@
+package templates
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	"github.com/gofiber/template/html/v2"
+
+	"micrach/repositories"
+)
+
+func TestHTMLTemplatesLoadAndRender(t *testing.T) {
+	engine := html.New("../templates", ".html")
+	engine.AddFunc("Iterate", Iterate)
+	engine.AddFunc("NotNil", NotNil)
+
+	if err := engine.Load(); err != nil {
+		t.Fatalf("load templates: %v", err)
+	}
+
+	const message = "template compatibility"
+	var rendered bytes.Buffer
+	if err := engine.Render(&rendered, "pages/400", repositories.BadRequestHtmlData{Message: message}); err != nil {
+		t.Fatalf("render template: %v", err)
+	}
+	if !strings.Contains(rendered.String(), message) {
+		t.Fatalf("rendered template does not contain %q", message)
+	}
+}