fix test

Author: rainyl

lib/src/core/mat.dart

@@ -294,21 +294,16 @@ class Mat extends CvStruct<cvg.Mat> {
       });
 
   num atNum<T extends num>(int row, int col, [int? i2]) {
-    return using<num>((arena) {
-      final p = arena<ffi.Int>();
-      cvRun(() => CFFI.Mat_Type(ref, p));
-      final depth = p.value & (MatType.CV_DEPTH_MAX - 1);
-      return switch (depth) {
-        MatType.CV_8U => atU8(row, col, i2),
-        MatType.CV_8S => atI8(row, col, i2),
-        MatType.CV_16U => atU16(row, col, i2),
-        MatType.CV_16S => atI16(row, col, i2),
-        MatType.CV_32S => atI32(row, col, i2),
-        MatType.CV_32F => atF32(row, col, i2),
-        MatType.CV_64F => atF64(row, col, i2),
-        _ => throw UnsupportedError("Unsupported type: $type")
-      };
-    });
+    return switch (type.depth) {
+      MatType.CV_8U => atU8(row, col, i2),
+      MatType.CV_8S => atI8(row, col, i2),
+      MatType.CV_16U => atU16(row, col, i2),
+      MatType.CV_16S => atI16(row, col, i2),
+      MatType.CV_32S => atI32(row, col, i2),
+      MatType.CV_32F => atF32(row, col, i2),
+      MatType.CV_64F => atF64(row, col, i2),
+      _ => throw UnsupportedError("Unsupported type: $type")
+    };
   }
 
   T atVec<T>(int row, int col) {

test/core/mat_test.dart

@@ -631,7 +631,7 @@ void main() async {
     expect(mat.at<cv.Vec4d>(0, 0), cv.Vec4d(99, 99, 99, 99));
   });
 
-  test('Mat at set perf', () {
+  test('Mat at set perf', skip: true, () {
     final mat = cv.Mat.zeros(3840, 2160, cv.MatType.CV_8UC1);
     final sw = Stopwatch();
 

test/video_test.dart

@@ -65,7 +65,7 @@ void main() async {
     final testImg = cv.resize(img, (216, 216));
     final translationGround = cv.Mat.eye(2, 3, cv.MatType.CV_32FC1);
     translationGround.set<double>(0, 2, 11.4159);
-    translationGround.setF64(1, 2, 17.1828);
+    translationGround.setF32(1, 2, 17.1828);
 
     final wrappedImage = cv.warpAffine(
       testImg,