add more tests

tests/math/testpivector2d.cpp

@@ -652,6 +652,51 @@ TEST_F(Vector2DTest, transposed_returns_correct_dimensions) {
 	}
 }
 
+TEST(Vector2DTransposeTest, emptyMatrix_returnsEmpty) {
+	PIVector2D<int> empty;
+	auto transposed = empty.transposed();
+	EXPECT_TRUE(transposed.isEmpty());
+	EXPECT_EQ(transposed.rows(), 0);
+	EXPECT_EQ(transposed.cols(), 0);
+}
+
+TEST(Vector2DTransposeTest, singleElement_returnsSame) {
+	PIVector2D<int> single(1, 1, 42);
+	auto transposed = single.transposed();
+	EXPECT_EQ(transposed.rows(), 1);
+	EXPECT_EQ(transposed.cols(), 1);
+	EXPECT_EQ(transposed.element(0, 0), 42);
+}
+
+TEST(Vector2DTransposeTest, oneRow_becomesOneColumn) {
+	PIVector2D<int> rowVec(1, 5);
+	for (size_t c = 0; c < 5; ++c) rowVec.element(0, c) = static_cast<int>(c);
+	auto transposed = rowVec.transposed();
+	EXPECT_EQ(transposed.rows(), 5);
+	EXPECT_EQ(transposed.cols(), 1);
+	for (size_t r = 0; r < 5; ++r) {
+		EXPECT_EQ(transposed.element(r, 0), static_cast<int>(r));
+	}
+}
+
+TEST(Vector2DTransposeTest, oneColumn_becomesOneRow) {
+	PIVector2D<int> colVec(5, 1);
+	for (size_t r = 0; r < 5; ++r) colVec.element(r, 0) = static_cast<int>(r);
+	auto transposed = colVec.transposed();
+	EXPECT_EQ(transposed.rows(), 1);
+	EXPECT_EQ(transposed.cols(), 5);
+	for (size_t c = 0; c < 5; ++c) {
+		EXPECT_EQ(transposed.element(0, c), static_cast<int>(c));
+	}
+}
+
+TEST_F(Vector2DTest, transposed_doesNotModifyOriginal) {
+	auto original = vec; // копия для сравнения
+	auto transposed = vec.transposed();
+	// Проверяем, что исходный массив не изменился
+	EXPECT_EQ(vec, original);
+}
+
 TEST_F(Vector2DTest, reverseRows_reverses_row_order) {
 	auto original = vec;
 	vec.reverseRows();