From 967210c08829e8ffff264c22a8917517a47c5480 Mon Sep 17 00:00:00 2001
From: Rutherther <rutherther@ditigal.xyz>
Date: Mon, 6 Oct 2025 15:21:03 +0200
Subject: [PATCH] tests: add test for Linear fitness function

---
 env/src/local_search/mod.rs | 42 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/env/src/local_search/mod.rs b/env/src/local_search/mod.rs
index 53817b1ef263922b7aa8fad3e332e26d08c87e5d..40162913b08c5166557a8c5856e044ce1bb79581 100644
--- a/env/src/local_search/mod.rs
+++ b/env/src/local_search/mod.rs
@@ -79,7 +79,9 @@ where
 
 #[cfg(test)]
 pub mod tests {
-    use crate::{binary_string::{BinaryString, Bounds}, comparison::MinimizingOperator, fitness::{one_max::OneMax, rosenbrock::Rosenbrock, sphere::Sphere, BinaryFitnessWrapper}, local_search::local_search_first_improving, perturbation::BinaryStringBitPerturbation, terminating::{AndTerminatingConditions, EqualTerminatingCondition, NoBetterForCyclesTerminatingCondition}};
+    use nalgebra::SVector;
+
+    use crate::{binary_string::{BinaryString, Bounds}, comparison::MinimizingOperator, fitness::{one_max::OneMax, real::Linear, rosenbrock::Rosenbrock, sphere::Sphere, BinaryFitnessWrapper}, local_search::local_search_first_improving, perturbation::{BinaryStringBitPerturbation, BoundedPerturbation, BoundedPerturbationStrategy, RandomDistributionPerturbation}, terminating::{AndTerminatingConditions, EqualTerminatingCondition, NoBetterForCyclesTerminatingCondition}};
 
     #[test]
     fn test_local_search_sphere() {
@@ -216,4 +218,42 @@ pub mod tests {
         );
     }
 
+    #[test]
+    fn test_local_search_linear() {
+        let optimum = SVector::<f64, 2>::from_vec(vec![-10.0, 10.0]);
+        let max = SVector::<f64, 2>::from_vec(vec![10.0, 10.0]);
+        let min = -SVector::<f64, 2>::from_vec(vec![10.0, 10.0]);
+
+        let linear = Linear::new(7.0, SVector::<f64, 2>::from_vec(vec![0.2, -0.5]));
+
+        let result = local_search_first_improving(
+            &linear,
+            &mut
+                AndTerminatingConditions::new(
+                    vec![
+                        &mut EqualTerminatingCondition::new_remembered(optimum.clone()),
+                        &mut NoBetterForCyclesTerminatingCondition::new(100)
+                    ]
+                ),
+            &mut BoundedPerturbation::new(
+                RandomDistributionPerturbation::normal(0.5).unwrap(),
+                min,
+                max,
+                BoundedPerturbationStrategy::Retry(10)),
+            &MinimizingOperator::new(),
+            &SVector::<f64, 2>::zeros(),
+        ).unwrap();
+
+        println!("{:?}", result);
+
+        assert_eq!(
+            result.best_candidate.fit,
+            -0.0
+        );
+
+        assert_eq!(
+            result.best_candidate.pos,
+            optimum
+        );
+    }
 }