package magic

import (
	"testing"

	"sneak.berlin/go/pixa/internal/imagerequest"
)

// testMIMEJXL is the MIME type of JPEG XL.
const testMIMEJXL = "image/jxl"

// TestDetectFormatJPEGXL verifies that both JPEG XL signatures, that of a
// bare codestream and that of the container, are detected as JPEG XL and
// match the MIME type image/jxl.
func TestDetectFormatJPEGXL(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name string
		data []byte
	}{
		{"codestream", pad(0xFF, 0x0A)},
		{"container", pad(
			0x00, 0x00, 0x00, 0x0C, 0x4A, 0x58, 0x4C, 0x20, 0x0D, 0x0A, 0x87, 0x0A,
		)},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()

			got, err := DetectFormat(tt.data)
			if err != nil || got != imagerequest.FormatJXL {
				t.Errorf("DetectFormat() = %q, %v, want %q",
					got, err, imagerequest.FormatJXL)
			}

			_, err = ValidateMagicBytes(tt.data, testMIMEJXL)
			if err != nil {
				t.Errorf("ValidateMagicBytes(%q) error = %v", testMIMEJXL, err)
			}
		})
	}
}