107 lines
2.3 KiB
C++
107 lines
2.3 KiB
C++
#include "Catch2.h"
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#include <Eule/Math.h>
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using namespace Eule;
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/** Equivalence classes:
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* -- a < b, 0 < t < 1 -> a < result < b
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* -- a > b, 0 < t < 1 -> b < result < a
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* -- a == b, 0 < t < 1 -> result == b
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*
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* -- a < b, t < 0 -> result < a
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* -- a > b, t < 0 -> result > a
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* -- a == b, t < 0 -> result == b
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*
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* -- a < b, t > 1 -> result > b
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* -- a > b, t > 1 -> result < b
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* -- a == b, t > 1 -> result == b
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*
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* -- a == 0
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* -- b == 0
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* -- a == b == 0
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*/
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// -- a < b, 0 < t < 1 -> a < result < b
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TEST_CASE(__FILE__"/a_lt_b___0_lt_t_lt_1", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(1, 2, 0.75) == 1.75);
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return;
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}
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// -- a > b, 0 < t < 1 -> b < result < a
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TEST_CASE(__FILE__"/a_gt_b___0_lt_t_lt_1", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(2, 1, 0.75) == 1.25);
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return;
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}
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// -- a == b, 0 < t < 1 -> result == b
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TEST_CASE(__FILE__"/a_eq_b___0_lt_t_lt_1", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(2, 2, 0.75) == 2.0);
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return;
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}
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// -- a < b, t < 0 -> result < a
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TEST_CASE(__FILE__"/a_lt_b___t_lt_0", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(1, 2, -0.75) == 0.25);
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return;
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}
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// -- a > b, t < 0 -> result > a
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TEST_CASE(__FILE__"/a_gt_b___t_lt_0", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(2, 1, -0.75) == 2.75);
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return;
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}
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// -- a == b, t < 0 -> result == b
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TEST_CASE(__FILE__"/a_eq_b___t_lt_0", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(2, 2, -0.75) == 2.0);
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return;
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}
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// -- a < b, t > 1 -> result > b
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TEST_CASE(__FILE__"/a_lt_b___t_gt_1", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(1, 2, 1.5) == 2.5);
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return;
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}
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// -- a > b, t > 1 -> result < b
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TEST_CASE(__FILE__"/a_gt_b___t_gt_1", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(2, 1, 1.5) == 0.5);
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return;
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}
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// -- a == b, t > 1 -> result == b
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TEST_CASE(__FILE__"/a_eq_b___t_gt_1", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(1, 1, 1.5) == 1.0);
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return;
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}
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// -- a == 0
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TEST_CASE(__FILE__"/a_eq_0", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(0, 3, 0.75) == 2.25);
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return;
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}
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// -- b == 0
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TEST_CASE(__FILE__"/b_eq_0", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(3, 0, 0.75) == 0.75);
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return;
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}
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// -- a == b == 0
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TEST_CASE(__FILE__"/a_eq_b_eq_0", "[Math][Lerp]")
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{
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REQUIRE(Math::Lerp(0, 0, 0.75) == 0.0);
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return;
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}
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