feat: file_save_disk, file_delete, file_serve, upload_parse, upload_handler, thumbnail_generate (issue 0014 fase 3)

2026-04-18 17:15:39 +02:00
parent 746d9dd4c9
commit 55998e36ad
18 changed files with 1114 additions and 0 deletions
@@ -0,0 +1,100 @@
+package infra
+
+import (
+	"bytes"
+	"encoding/json"
+	"mime/multipart"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+// buildPNGMultipart crea un multipart con un campo "file" cuyo contenido tiene
+// los magic bytes de PNG (suficientes para que FileValidateType los reconozca).
+func buildPNGMultipart(t *testing.T, filename string, body string) (string, *bytes.Buffer) {
+	t.Helper()
+	var buf bytes.Buffer
+	w := multipart.NewWriter(&buf)
+	part, err := w.CreateFormFile("file", filename)
+	if err != nil {
+		t.Fatalf("CreateFormFile: %v", err)
+	}
+	// Magic bytes PNG: 89 50 4E 47 0D 0A 1A 0A
+	part.Write([]byte{0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A})
+	part.Write([]byte(body))
+	w.Close()
+	return w.FormDataContentType(), &buf
+}
+
+func TestUploadHandler(t *testing.T) {
+	t.Run("acepta upload con imagen y responde JSON", func(t *testing.T) {
+		dir := t.TempDir()
+		cfg := StorageConfig{
+			BaseDir:      dir,
+			MaxFileSize:  1 << 20,
+			AllowedTypes: []string{"image/png"},
+		}
+		ct, body := buildPNGMultipart(t, "foto.png", "data extra")
+
+		req := httptest.NewRequest("POST", "/upload", body)
+		req.Header.Set("Content-Type", ct)
+		rec := httptest.NewRecorder()
+
+		UploadHandler(cfg).ServeHTTP(rec, req)
+
+		if rec.Code != http.StatusOK {
+			t.Fatalf("got %d, body=%s", rec.Code, rec.Body.String())
+		}
+		var resp struct {
+			Files []UploadedFile `json:"files"`
+		}
+		if err := json.Unmarshal(rec.Body.Bytes(), &resp); err != nil {
+			t.Fatalf("unmarshal: %v", err)
+		}
+		if len(resp.Files) != 1 {
+			t.Fatalf("got %d files, want 1", len(resp.Files))
+		}
+		if resp.Files[0].ContentType != "image/png" {
+			t.Errorf("got ContentType %q", resp.Files[0].ContentType)
+		}
+	})
+
+	t.Run("rechaza tipo no permitido con 415", func(t *testing.T) {
+		dir := t.TempDir()
+		cfg := StorageConfig{
+			BaseDir:      dir,
+			MaxFileSize:  1 << 20,
+			AllowedTypes: []string{"application/pdf"}, // PNG no en lista
+		}
+		ct, body := buildPNGMultipart(t, "foto.png", "x")
+
+		req := httptest.NewRequest("POST", "/upload", body)
+		req.Header.Set("Content-Type", ct)
+		rec := httptest.NewRecorder()
+
+		UploadHandler(cfg).ServeHTTP(rec, req)
+
+		if rec.Code != http.StatusUnsupportedMediaType {
+			t.Errorf("got %d, want 415", rec.Code)
+		}
+	})
+
+	t.Run("rechaza body que excede MaxFileSize con 400", func(t *testing.T) {
+		dir := t.TempDir()
+		cfg := StorageConfig{
+			BaseDir:      dir,
+			MaxFileSize:  10, // muy pequeno
+			AllowedTypes: []string{"image/png"},
+		}
+		ct, body := buildPNGMultipart(t, "foto.png", "muchos bytes extra para superar 10")
+
+		req := httptest.NewRequest("POST", "/upload", body)
+		req.Header.Set("Content-Type", ct)
+		rec := httptest.NewRecorder()
+
+		UploadHandler(cfg).ServeHTTP(rec, req)
+		if rec.Code != http.StatusBadRequest {
+			t.Errorf("got %d, want 400", rec.Code)
+		}
+	})
+}