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/* Apache License, Version 2.0 */
#include "testing/testing.h"
#include "BLI_math_solvers.h"
TEST(math_solvers, Tridiagonal1)
{
float a[1] = {1}; // ignored
float b[1] = {2};
float c[1] = {1}; // ignored
float d[1] = {4};
float x[1];
EXPECT_TRUE(BLI_tridiagonal_solve(a, b, c, d, x, 1));
EXPECT_FLOAT_EQ(x[0], 2);
}
TEST(math_solvers, Tridiagonal3)
{
float a[3] = {1, 2, 3}; // 1 ignored
float b[3] = {4, 5, 6};
float c[3] = {7, 8, 9}; // 9 ignored
float d[3] = {18, 36, 24};
float x[3];
EXPECT_TRUE(BLI_tridiagonal_solve(a, b, c, d, x, 3));
EXPECT_FLOAT_EQ(x[0], 1);
EXPECT_FLOAT_EQ(x[1], 2);
EXPECT_FLOAT_EQ(x[2], 3);
}
TEST(math_solvers, CyclicTridiagonal1)
{
float a[1] = {1};
float b[1] = {2};
float c[1] = {1};
float d[1] = {4};
float x[1];
EXPECT_TRUE(BLI_tridiagonal_solve_cyclic(a, b, c, d, x, 1));
EXPECT_FLOAT_EQ(x[0], 1);
}
TEST(math_solvers, CyclicTridiagonal2)
{
float a[2] = {1, 2};
float b[2] = {3, 4};
float c[2] = {5, 6};
float d[2] = {15, 16};
float x[2];
EXPECT_TRUE(BLI_tridiagonal_solve_cyclic(a, b, c, d, x, 2));
EXPECT_FLOAT_EQ(x[0], 1);
EXPECT_FLOAT_EQ(x[1], 2);
}
TEST(math_solvers, CyclicTridiagonal3)
{
float a[3] = {1, 2, 3};
float b[3] = {4, 5, 6};
float c[3] = {7, 8, 9};
float d[3] = {21, 36, 33};
float x[3];
EXPECT_TRUE(BLI_tridiagonal_solve_cyclic(a, b, c, d, x, 3));
EXPECT_FLOAT_EQ(x[0], 1);
EXPECT_FLOAT_EQ(x[1], 2);
EXPECT_FLOAT_EQ(x[2], 3);
}
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