feat(API): media library

test/media_fixtures_test.go

@@ -0,0 +1,103 @@
+package test
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"image"
+	"image/color"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"mime/multipart"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+const webpFixtureBase64 = "UklGRhoAAABXRUJQVlA4TA0AAAAvAAAAEAcQERGIiP4HAA=="
+
+const svgFixture = `<svg xmlns="http://www.w3.org/2000/svg" width="10" height="10"/>`
+
+func solidImage(width int, height int) image.Image {
+	canvas := image.NewRGBA(image.Rect(0, 0, width, height))
+	for x := 0; x < width; x++ {
+		for y := 0; y < height; y++ {
+			canvas.Set(x, y, color.RGBA{R: uint8(x * 40), G: uint8(y * 40), B: 200, A: 255})
+		}
+	}
+	return canvas
+}
+
+func pngBytes(t *testing.T, width int, height int) []byte {
+	t.Helper()
+	buffer := &bytes.Buffer{}
+	if err := png.Encode(buffer, solidImage(width, height)); err != nil {
+		t.Fatalf("failed to encode png: %v", err)
+	}
+	return buffer.Bytes()
+}
+
+func jpegBytes(t *testing.T, width int, height int) []byte {
+	t.Helper()
+	buffer := &bytes.Buffer{}
+	if err := jpeg.Encode(buffer, solidImage(width, height), nil); err != nil {
+		t.Fatalf("failed to encode jpeg: %v", err)
+	}
+	return buffer.Bytes()
+}
+
+func webpBytes(t *testing.T) []byte {
+	t.Helper()
+	data, err := base64.StdEncoding.DecodeString(webpFixtureBase64)
+	if err != nil {
+		t.Fatalf("failed to decode webp fixture: %v", err)
+	}
+	return data
+}
+
+func paddedPngBytes(t *testing.T, size int) []byte {
+	t.Helper()
+	data := pngBytes(t, 3, 2)
+	return append(data, bytes.Repeat([]byte{0}, size-len(data))...)
+}
+
+func sha256Hex(data []byte) string {
+	sum := sha256.Sum256(data)
+	return hex.EncodeToString(sum[:])
+}
+
+func newMultipartFileRequest(t *testing.T, method string, url string, filename string, contentType string, content []byte) *http.Request {
+	t.Helper()
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+	part, err := writer.CreatePart(map[string][]string{
+		"Content-Disposition": {`form-data; name="file"; filename="` + filename + `"`},
+		"Content-Type":        {contentType},
+	})
+	if err != nil {
+		t.Fatalf("failed to create multipart part: %v", err)
+	}
+	if _, err := io.Copy(part, bytes.NewReader(content)); err != nil {
+		t.Fatalf("failed to write file content: %v", err)
+	}
+	if err := writer.Close(); err != nil {
+		t.Fatalf("failed to close multipart writer: %v", err)
+	}
+	req := httptest.NewRequest(method, url, body)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+	return req
+}
+
+func newMultipartWithoutFileRequest(t *testing.T, url string) *http.Request {
+	t.Helper()
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+	if err := writer.Close(); err != nil {
+		t.Fatalf("failed to close multipart writer: %v", err)
+	}
+	req := httptest.NewRequest(http.MethodPost, url, body)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+	return req
+}