Added initial unit test for ExplicitConvert

unit_tests/recipies/Test_ExplicitConvert.cpp

+/********************************************************************************
+ * Copyright (c) 2023 CEA-List
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ ********************************************************************************/
+
+#include <catch2/catch_test_macros.hpp>
+
+#include "aidge/recipies/Recipies.hpp"
+#include "aidge/operator/Conv.hpp"
+#include "aidge/operator/Producer.hpp"
+#include "aidge/graph/OpArgs.hpp"
+#include <cstddef>
+
+using namespace Aidge;
+
+TEST_CASE("[ExplicitConvert] conv") {
+    auto conv1 = Conv(3, 32, {3, 3}, "conv1");
+    auto conv2 = Conv(32, 64, {3, 3}, "conv2");
+    auto conv3 = Conv(64, 10, {1, 1}, "conv3", {2, 2});
+
+    auto g1 = Sequential({
+        Producer({16, 3, 224, 224}, "dataProvider"),
+        conv1,
+        conv2,
+        conv3
+    });
+
+    g1->setBackend("cpu");
+    conv1->getOperator()->setDataType(DataType::Int32);
+    conv3->getOperator()->setDataType(DataType::Float64);
+
+    g1->save("ExplicitConvert_before");
+    REQUIRE(g1->getNodes().size() == 10);
+
+    g1->forwardDims();
+    explicitConvert(g1);
+
+    g1->save("ExplicitConvert_after");
+    REQUIRE(g1->getNodes().size() == 5);
+}