Begin tests for ASTNodeExpressionBuilder

One needs to add expression information kind to allow to define proper unit tests

tests/CMakeLists.txt

@@ -12,6 +12,7 @@ add_executable (unit_tests
   test_ASTNodeDataTypeChecker.cpp
   test_ASTNodeDeclarationCleaner.cpp
   test_ASTNodeDeclarationToAffectationConverter.cpp
+  test_ASTNodeExpressionBuilder.cpp
   test_ASTNodeJumpPlacementChecker.cpp
   test_ASTNodeValueBuilder.cpp
   test_ASTPrinter.cpp

tests/test_ASTNodeExpressionBuilder.cpp

+#include <catch2/catch.hpp>
+
+#include <ASTNodeValueBuilder.hpp>
+
+#include <ASTBuilder.hpp>
+#include <ASTNodeDataTypeBuilder.hpp>
+
+#include <ASTNodeDeclarationCleaner.hpp>
+#include <ASTNodeDeclarationToAffectationConverter.hpp>
+
+#include <ASTNodeExpressionBuilder.hpp>
+
+#include <ASTSymbolTableBuilder.hpp>
+
+#include <ASTPrinter.hpp>
+
+#define CHECK_AST(data, expected_output)                                                       \
+  {                                                                                            \
+    static_assert(std::is_same_v<std::decay_t<decltype(data)>, std::string_view>);             \
+    static_assert(std::is_same_v<std::decay_t<decltype(expected_output)>, std::string_view>);  \
+                                                                                               \
+    string_input input{data, "test.pgs"};                                                      \
+    auto ast = ASTBuilder::build(input);                                                       \
+                                                                                               \
+    ASTSymbolTableBuilder{*ast};                                                               \
+    ASTNodeDataTypeBuilder{*ast};                                                              \
+    ASTNodeValueBuilder{*ast};                                                                 \
+                                                                                               \
+    ASTNodeDeclarationToAffectationConverter{*ast};                                            \
+    ASTNodeDeclarationCleaner{*ast};                                                           \
+                                                                                               \
+    ASTNodeExpressionBuilder{*ast};                                                            \
+    std::stringstream ast_output;                                                              \
+    ast_output << '\n' << ASTPrinter{*ast, ASTPrinter::Format::raw, {ASTPrinter::Info::none}}; \
+                                                                                               \
+    REQUIRE(ast_output.str() == expected_output);                                              \
+  }
+
+TEST_CASE("ASTNodeExpressionBuilder", "[language]")
+{
+  SECTION("nothing to convert")
+  {
+    std::string_view data = R"(
+)";
+
+    std::string_view result = R"(
+(root)
+)";
+
+    CHECK_AST(data, result);
+  }
+}