Add tests for cpp_macro_definition parsing

test/cpp_preprocessor.cpp

@@ -0,0 +1,59 @@
+// Copyright (C) 2017 Jonathan Müller <jonathanmueller.dev@gmail.com>
+// This file is subject to the license terms in the LICENSE file
+// found in the top-level directory of this distribution.
+
+#include <cppast/cpp_preprocessor.hpp>
+
+#include "test_parser.hpp"
+
+using namespace cppast;
+
+TEST_CASE("cpp_macro_definition")
+{
+    auto code = R"(
+#include <iostream>
+#define G
+#define A
+#define B hello
+#define C(x, y) x##_name
+#define D(...) __VA_ARGS__
+#define E() bar\
+baz
+#define F () bar
+#undef G
+)";
+
+    auto check_macro = [](const cpp_macro_definition& macro, const char* replacement,
+                          const char* args) {
+        REQUIRE(macro.replacement() == replacement);
+        if (args)
+        {
+            REQUIRE(macro.is_function_like());
+            REQUIRE(macro.parameters().value() == args);
+        }
+        else
+        {
+            REQUIRE(!macro.is_function_like());
+            REQUIRE(!macro.parameters().has_value());
+        }
+    };
+
+    auto file  = parse({}, "cpp_macro_definition.cpp", code);
+    auto count = test_visit<cpp_macro_definition>(*file, [&](const cpp_macro_definition& macro) {
+        if (macro.name() == "A")
+            check_macro(macro, "", nullptr);
+        else if (macro.name() == "B")
+            check_macro(macro, "hello", nullptr);
+        else if (macro.name() == "C")
+            check_macro(macro, "x##_name", "x,y");
+        else if (macro.name() == "D")
+            check_macro(macro, "__VA_ARGS__", "...");
+        else if (macro.name() == "E")
+            check_macro(macro, "barbaz", "");
+        else if (macro.name() == "F")
+            check_macro(macro, "() bar", nullptr);
+        else
+            REQUIRE(false);
+    });
+    REQUIRE(count == 6u);
+}