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150796337a
- add unittest for dynamic & fixed-size reshape - fix fixed-size reshape bugs bugs found while testing
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2014 yoco <peter.xiau@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#include "main.h"
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using Eigen::Map;
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using Eigen::MatrixXi;
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void dynamic_reshape_all_size(int row, int col) {
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// create matrix(row, col) and filled with 0, 1, 2, ...
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Eigen::MatrixXi m(row, col);
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for(int r = 0; r < row; ++r)
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for(int c = 0; c < col; ++c)
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m(r, c) = col * c + r;
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// for all possible shape
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for(int new_r = 1; new_r <= row * col; ++new_r) {
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// skip invalid shape
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if(row * col % new_r != 0)
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continue;
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// reshape and compare
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int new_c = row * col / new_r;
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VERIFY_IS_EQUAL(m.reshape(new_r, new_c),
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Map<MatrixXi>(m.data(), new_r, new_c));
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}
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}
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// just test a 4x4 matrix, enumerate all combination manually,
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// so I don't have to do template-meta-programming here.
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void static_reshape_all_size() {
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// create matrix(row, col) and filled with 0, 1, 2, ...
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int row = 4;
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int col = 4;
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Eigen::MatrixXi m(row, col);
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for(int r = 0; r < row; ++r)
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for(int c = 0; c < col; ++c)
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m(r, c) = col * c + r;
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// reshape and compare
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VERIFY_IS_EQUAL((m.reshape< 1, 16>()), Map<MatrixXi>(m.data(), 1, 16));
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VERIFY_IS_EQUAL((m.reshape< 2, 8>()), Map<MatrixXi>(m.data(), 2, 8));
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VERIFY_IS_EQUAL((m.reshape< 4, 4>()), Map<MatrixXi>(m.data(), 4, 4));
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VERIFY_IS_EQUAL((m.reshape< 8, 2>()), Map<MatrixXi>(m.data(), 8, 2));
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VERIFY_IS_EQUAL((m.reshape<16, 1>()), Map<MatrixXi>(m.data(), 16, 1));
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}
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void test_reshape()
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{
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CALL_SUBTEST(dynamic_reshape_all_size(4, 4));
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CALL_SUBTEST(static_reshape_all_size());
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}
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