diff --git a/tests/math/testpivector2d.cpp b/tests/math/testpivector2d.cpp
new file mode 100644
index 00000000..daf710b1
--- /dev/null
+++ b/tests/math/testpivector2d.cpp
@@ -0,0 +1,54 @@
+#include "gtest/gtest.h"
+#include "pivector2d.h"
+
+void assert_fill_with(PIVector2D<int> vec, int rows, int cols, int val) {
+	for(int r = 0; r < rows; r++) {
+		for(int c = 0; c < cols; c++) {
+			ASSERT_EQ(vec.element(r, c), val);
+		}
+	}
+}
+
+int ROWS_COUNT_INIT = 200;
+int ROWS_COUNT_INCREASE = 300;
+int ROWS_COUNT_REDUCE = 100;
+
+int COLS_COUNT_INIT = 200;
+int COLS_COUNT_INCREASE = 300;
+int COLS_COUNT_REDUCE = 100;
+
+TEST(PIVector2D_Test, resize_is_increase_col_count) {
+	PIVector2D<int> vec(ROWS_COUNT_INIT, COLS_COUNT_INIT, INT32_MAX);
+	vec.resize(ROWS_COUNT_INIT, COLS_COUNT_INCREASE, 0);
+	ASSERT_EQ(vec.cols(), COLS_COUNT_INCREASE);
+}
+
+TEST(PIVector2D_Test, resize_is_reduce_col_count) {
+	PIVector2D<int> vec(ROWS_COUNT_INIT, COLS_COUNT_INIT, INT32_MAX);
+	vec.resize(ROWS_COUNT_INIT, COLS_COUNT_REDUCE, 0);
+	ASSERT_EQ(vec.cols(), COLS_COUNT_REDUCE);
+}
+
+TEST(PIVector2D_Test, resize_is_increase_rows_count) {
+	PIVector2D<int> vec(ROWS_COUNT_INIT, COLS_COUNT_INIT, INT32_MAX);
+	vec.resize(ROWS_COUNT_INCREASE, COLS_COUNT_INIT, 0);
+	ASSERT_EQ(vec.rows(), ROWS_COUNT_INCREASE);
+}
+
+TEST(PIVector2D_Test, resize_is_reduce_rows_count) {
+	PIVector2D<int> vec(ROWS_COUNT_INIT, COLS_COUNT_INIT, INT32_MAX);
+	vec.resize(ROWS_COUNT_REDUCE, COLS_COUNT_INIT, 0);
+	ASSERT_EQ(vec.rows(), ROWS_COUNT_REDUCE);
+}
+
+TEST(PIVector2D_Test, resize_increase_is_data_stay_consistent) {
+	PIVector2D<int> vec(ROWS_COUNT_INIT, COLS_COUNT_INIT, INT32_MAX);
+	vec.resize(ROWS_COUNT_INCREASE, COLS_COUNT_INCREASE, 0);
+	assert_fill_with(vec, ROWS_COUNT_INIT, COLS_COUNT_INIT, INT32_MAX);
+}
+
+TEST(PIVector2D_Test, resize_reduce_is_data_stay_consistent) {
+	PIVector2D<int> vec(ROWS_COUNT_INIT, COLS_COUNT_INIT, INT32_MAX);
+	vec.resize(ROWS_COUNT_REDUCE, COLS_COUNT_REDUCE, 0);
+	assert_fill_with(vec, ROWS_COUNT_REDUCE, COLS_COUNT_REDUCE, INT32_MAX);
+}
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