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libraries/FastLED/tests/test_slice.cpp Normal file
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// g++ --std=c++11 test.cpp
#include "test.h"
#include "fl/slice.h"
#include "fl/unused.h"
#include "fl/vector.h"
#include "test.h"
using namespace fl;
TEST_CASE("vector slice") {
HeapVector<int> vec;
vec.push_back(1);
vec.push_back(2);
vec.push_back(3);
vec.push_back(4);
Slice<int> slice(vec.data(), vec.size());
REQUIRE_EQ(slice.length(), 4);
REQUIRE_EQ(slice[0], 1);
REQUIRE_EQ(slice[1], 2);
REQUIRE_EQ(slice[2], 3);
REQUIRE_EQ(slice[3], 4);
Slice<int> slice2 = slice.slice(1, 3);
REQUIRE_EQ(slice2.length(), 2);
REQUIRE_EQ(slice2[0], 2);
REQUIRE_EQ(slice2[1], 3);
}
TEST_CASE("matrix compile") {
int data[2][2] = {{1, 2}, {3, 4}};
// Window from (0,0) up to (1,1)
MatrixSlice<int> slice(&data[0][0], // data pointer
2, // data width
2, // data height
0, 0, // bottom-left x,y
1, 1 // top-right x,y
);
FASTLED_UNUSED(slice);
// just a compile‐time smoke test
}
TEST_CASE("matrix slice returns correct values") {
int data[2][2] = {{1, 2}, {3, 4}};
// Window from (0,0) up to (1,1)
MatrixSlice<int> slice(&data[0][0], // data pointer
2, // data width
2, // data height
0, 0, // bottom-left x,y
1, 1 // top-right x,y
);
// sanity‐check each element
REQUIRE_EQ(slice(0, 0), data[0][0]);
REQUIRE_EQ(slice(1, 0), data[0][1]);
REQUIRE_EQ(slice(0, 1), data[1][0]);
REQUIRE_EQ(slice(1, 1), data[1][1]);
// Require that the [][] operator works the same as the data
REQUIRE_EQ(slice[0][0], data[0][0]);
REQUIRE_EQ(slice[0][1], data[0][1]);
REQUIRE_EQ(slice[1][0], data[1][0]);
REQUIRE_EQ(slice[1][1], data[1][1]);
}
TEST_CASE("4x4 matrix slice returns correct values") {
int data[4][4] = {
{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}, {13, 14, 15, 16}};
// Take a 2×2 window from (1,1) up to (2,2)
MatrixSlice<int> slice(&data[0][0], // data pointer
4, // data width
4, // data height
1, 1, // bottom-left x,y
2, 2 // top-right x,y
);
// test array access
REQUIRE_EQ(slice[0][0], data[1][1]);
REQUIRE_EQ(slice[0][1], data[1][2]);
REQUIRE_EQ(slice[1][0], data[2][1]);
REQUIRE_EQ(slice[1][1], data[2][2]);
// Remember that array access is row-major, so data[y][x] == slice(x,y)
REQUIRE_EQ(slice(0, 0), data[1][1]);
REQUIRE_EQ(slice(1, 0), data[1][2]);
REQUIRE_EQ(slice(0, 1), data[2][1]);
REQUIRE_EQ(slice(1, 1), data[2][2]);
}