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package media
import (
"bytes"
"encoding/json"
"image"
"image/jpeg"
"mime/multipart"
"net/http"
"net/http/httptest"
"os"
"path/filepath"
"testing"
"github.com/gin-gonic/gin"
)
func init() {
gin.SetMode(gin.TestMode)
}
func newTestHandler(t *testing.T) (*MediaHandler, string) {
t.Helper()
dir := t.TempDir()
return NewMediaHandler(dir), dir
}
func testJPEGBytes(t *testing.T) []byte {
t.Helper()
img := image.NewRGBA(image.Rect(0, 0, 100, 60))
var buf bytes.Buffer
if err := jpeg.Encode(&buf, img, nil); err != nil {
t.Fatalf("encode jpeg: %v", err)
}
return buf.Bytes()
}
func multipartUpload(t *testing.T, field, filename string, data []byte) *http.Request {
t.Helper()
var body bytes.Buffer
w := multipart.NewWriter(&body)
fw, err := w.CreateFormFile(field, filename)
if err != nil {
t.Fatalf("create form file: %v", err)
}
fw.Write(data)
w.Close()
req, _ := http.NewRequest(http.MethodPost, "/admin/upload/image", &body)
req.Header.Set("Content-Type", w.FormDataContentType())
return req
}
// TestUploadValid verifies a valid JPEG upload returns success with a /media/ URL.
func TestUploadValid(t *testing.T) {
h, dir := newTestHandler(t)
rr := httptest.NewRecorder()
c, _ := gin.CreateTestContext(rr)
c.Request = multipartUpload(t, "image", "photo.jpg", testJPEGBytes(t))
h.HandleUpload(c)
if rr.Code != http.StatusOK {
t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
}
var resp map[string]interface{}
if err := json.Unmarshal(rr.Body.Bytes(), &resp); err != nil {
t.Fatalf("parse response: %v", err)
}
if resp["success"] != float64(1) {
t.Fatalf("expected success=1, got %v", resp)
}
file, ok := resp["file"].(map[string]interface{})
if !ok {
t.Fatal("expected file object in response")
}
url, _ := file["url"].(string)
if len(url) < 7 || url[:7] != "/media/" {
t.Fatalf("expected /media/ URL, got %q", url)
}
entries, _ := os.ReadDir(dir)
if len(entries) == 0 {
t.Fatal("expected original to be written to storage dir")
}
}
// TestUploadInvalidMIME rejects non-image content.
func TestUploadInvalidMIME(t *testing.T) {
h, _ := newTestHandler(t)
rr := httptest.NewRecorder()
c, _ := gin.CreateTestContext(rr)
c.Request = multipartUpload(t, "image", "evil.txt", []byte("not an image at all"))
h.HandleUpload(c)
if rr.Code != http.StatusBadRequest {
t.Fatalf("expected 400, got %d", rr.Code)
}
}
// TestUploadWrongField rejects request missing the "image" field.
func TestUploadWrongField(t *testing.T) {
h, _ := newTestHandler(t)
rr := httptest.NewRecorder()
c, _ := gin.CreateTestContext(rr)
c.Request = multipartUpload(t, "file", "photo.jpg", testJPEGBytes(t))
h.HandleUpload(c)
if rr.Code != http.StatusBadRequest {
t.Fatalf("expected 400, got %d", rr.Code)
}
}
// TestServeCacheHit serves a pre-existing cache file directly.
func TestServeCacheHit(t *testing.T) {
h, dir := newTestHandler(t)
if err := os.WriteFile(filepath.Join(dir, "abc123.webp"), []byte("FAKE_WEBP"), 0644); err != nil {
t.Fatal(err)
}
rr := httptest.NewRecorder()
c, _ := gin.CreateTestContext(rr)
c.Request = httptest.NewRequest(http.MethodGet, "/media/abc123.webp", nil)
c.Params = gin.Params{{Key: "filepath", Value: "/abc123.webp"}}
h.HandleServe(c)
if rr.Code != http.StatusOK {
t.Fatalf("expected 200, got %d", rr.Code)
}
if ct := rr.Header().Get("Content-Type"); ct != "image/webp" {
t.Fatalf("expected image/webp, got %q", ct)
}
}
// TestServeNotFound returns 404 when no original exists.
func TestServeNotFound(t *testing.T) {
h, _ := newTestHandler(t)
rr := httptest.NewRecorder()
c, _ := gin.CreateTestContext(rr)
c.Request = httptest.NewRequest(http.MethodGet, "/media/missing.webp", nil)
c.Params = gin.Params{{Key: "filepath", Value: "/missing.webp"}}
h.HandleServe(c)
if rr.Code != http.StatusNotFound {
t.Fatalf("expected 404, got %d", rr.Code)
}
}
// TestServeInvalidWidth returns 400 for non-positive width.
func TestServeInvalidWidth(t *testing.T) {
h, _ := newTestHandler(t)
rr := httptest.NewRecorder()
c, _ := gin.CreateTestContext(rr)
c.Request = httptest.NewRequest(http.MethodGet, "/media/abc.webp?w=0", nil)
c.Params = gin.Params{{Key: "filepath", Value: "/abc.webp"}}
h.HandleServe(c)
if rr.Code != http.StatusBadRequest {
t.Fatalf("expected 400, got %d", rr.Code)
}
}
// TestServeUnknownFormat returns 404 for unrecognised extensions.
func TestServeUnknownFormat(t *testing.T) {
h, _ := newTestHandler(t)
rr := httptest.NewRecorder()
c, _ := gin.CreateTestContext(rr)
c.Request = httptest.NewRequest(http.MethodGet, "/media/abc.png", nil)
c.Params = gin.Params{{Key: "filepath", Value: "/abc.png"}}
h.HandleServe(c)
if rr.Code != http.StatusNotFound {
t.Fatalf("expected 404, got %d", rr.Code)
}
}
// TestCacheKey verifies the cache filename scheme.
func TestCacheKey(t *testing.T) {
cases := []struct {
base, format string
width int
want string
}{
{"uuid1", "webp", 0, "uuid1.webp"},
{"uuid1", "webp", 800, "uuid1_800w.webp"},
{"uuid1", "jpeg", 0, "uuid1.jpg"},
{"uuid1", "jpeg", 400, "uuid1_400w.jpg"},
}
for _, tc := range cases {
got := cacheKey(tc.base, tc.width, tc.format)
if got != tc.want {
t.Errorf("cacheKey(%q, %d, %q) = %q, want %q", tc.base, tc.width, tc.format, got, tc.want)
}
}
}
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