randomize beta in leaky unit test

unit_tests/operator/Test_MetaOperator.cpp

@@ -757,6 +757,7 @@ TEST_CASE("[cpu/operator] MetaOperator", "[MetaOperator][CPU]") {
         std::uniform_int_distribution<std::size_t> nbDimsDist(std::size_t(3),
                                                               std::size_t(3));
         std::uniform_int_distribution<int> boolDist(0, 1);
+        std::uniform_real_distribution<float> betaDist(0,1);
 
         const std::size_t nbDims = nbDimsDist(gen);
         Log::info("Nbdims : {}", nbDims);
@@ -771,8 +772,9 @@ TEST_CASE("[cpu/operator] MetaOperator", "[MetaOperator][CPU]") {
         }
 
         const auto nbTimeSteps = dims[0];
+        const auto beta = betaDist(gen); 
 
-        auto myLeaky = Leaky(nbTimeSteps, 0.9, 1.0, "leaky");
+        auto myLeaky = Leaky(nbTimeSteps, beta, 1.0, "leaky");
         auto op =
             std::static_pointer_cast<MetaOperator_Op>(myLeaky->getOperator());
         // auto stack = Stack(2);
@@ -856,7 +858,7 @@ TEST_CASE("[cpu/operator] MetaOperator", "[MetaOperator][CPU]") {
             for (int j = 0; j < nbElementsPerTimeStep; ++j) {
                 auto reset = (result[prev + j] > 1.0 ? 1 : 0);
                 result[offset + j] =
-                    result[prev + j] * 0.9 + input[offset + j] - reset;
+                    result[prev + j] * beta + input[offset + j] - reset;
             }
         }